Hi and 73!
I have now, from 4th of August of 2014 until 4th August of 2015 special authorization from Portuguese authorities of communication ANACOM to work on 60 meters band on the frequencies 5288,5 kHz 5371,5 kHz 5380,5 kHz and 5403,5 kHz in the A1A and J3E radio emission class modes :)
I was the first Portuguese Class 1 (Extra Class) C.E.P.T. (European Conference of Postal and Telecommunications Administrations) Amateur Radio Operator working on the 60 meters band and also working on the 6 meters "Magic Band" as well the first one working on the 4 meters "Friendly Band".
I am almost all days QRV on 50.110 MHz CW/USB and 70.200 MHz CW/USB.
My interest areas in the radioamateur world operations are working DX with all telephony modulation modes, CW Morse Code telegraphy*, all digital modes including of course JT65, JT9, ROS, WSPR-2 and WSPR-15 QRP weak signal propagation reporter, SSTV and digital SSTV, D-STAR & DMR (D-STAR DMR-ID 2683052 with CCS7-ID (268)3052 & second DMR-ID 2683106 for DMR network), Digital Voice and WINDRM, ATV, Telephony QRP and Telegraphy QRP, Meteor Scatter, Aircraft Scatter, Moon reflection (Moon Boucing EME), antennas and electronic circuits homemade construction, Satellites, Amateur Radio Astronomy and im active in all that areas.
*(Pse, do not work CW morse code with me with MGM, the same is to say, pse dont use Machine Generated Mode computer software to work CW coding and decoding morse code with me. I think CW should be worked with vertical, iambic or bug manual or semi-automatic keys, not with digital modes computer software for God sake!).
At this moment im transmiting in HF, VHF and UHF bands with Kenwood TS-2000, Kenwood TS-870, Kenwood TS-450Sat, Kenwood TS-480Sat, Icom IC-7100, Icom IC-706MKIIG, Yaesu FT-847 and Yaesu FT-857D. Conected to these transceivers i have my 10 HF bands plus 2 VHF band (from 4 meters to 80 meters including 60 meters band and all WARC) homemade cat�s mustache fan dipole, a set of 6 half wave length dipoles conected to the same feed line with my homemade BALUN 1:1 installed inside of the attic (loft) with 10x10 meters (100 square meters) and 2.5 meters tall of a building with 3 floors high.
Also Installed inside the attic i have my homemade End Fed Wire with my homemade UNUN 9:1 working in all bands MF, HF and VHF from 160 meters band untill 6 meters band. I built the UNUN 9:1 with iron powder T200-2 toroid wrapped with 9 spiral turns of a set of 3 silver wires with 1.5 mm section each. My first version of this antenna was with a copper multifilar radiator with 2.5 mm section in inverted L geometry with 16,22 meters length long without no counterpoise (it used the coaxial shield as counterpoise). My last version have now a radiator of 54 meters long in zig zag geometry. It worked marvalous in all bands including 160 meters Top Band and 80 meters with just 16,22 meters radiator! But now with 54 meters long this antenna its a true "bomb" in perfomance in Top Band 160 meters and in 80 meters as well. It is untill now, by far, the best performer, cheapest, easy to build, easy to maintain, MF, HF and 6 meters multiband antenna i have ever built!!!
My homemade UNUN 9:1 with counterpoise and radiator elements.
Wires wires and more wires! :)...
Welcome to the caos of wires and antennas in my attic! :)...
In the image you can see my homemade end fed wire with 54 meters long in zig zag geometry in horizontal polarization (gray wire) plus my homemade fan dipole (blue wires) and my homemade vertical dual band VHF UHF antenna plus my homemade VHF monoband yagi and UHF monoband yagi.
Here a detail of the zig zag using the wood structure under the roof.
In electronics we should never work with an free or non insulated conductor or electrical compound! All untied tips conductors or electrical compound should be grounded or insulated! A detail here of the tip of the counterpoise of my end fed wire antenna with electric insulated tape laydown over the floor of the attic.
A detail of the warning signal information for irradiating systems and eletromagnetic waves irradiation acording to the legal parameters of portuguese authority of comunications (ANACOM).
On VHF and UHF im transmitting with my home made indoor (inside the attic) yagi dual band with 5 elements on VHF and 10 dBi�s and 8 elements on UHF with 12dBi�s.
I use more this antenna for satellites and moon reflection EME JT65 digital modes as well JT65M and FSK441 for meteor scatter. It is attached to my 2 home made VHF and UHF 20 dB�s LNA RX amplifiers specially design for moon reflection and meteor scatter operations. Excelent results on EME moon reflection on digital modes and meteor scatter and sure as hell excelent results working DX in SSB and FM phone direct :)
Other antena i am using for the VHF UHF bands is the VHF UHF dual band diamond X-50, a vertical ground plane antenna installed also inside the attic like all my antennas are.
I am working CW Morse Code now with the Hi-Mound MK-705 iambic dual paddle key with marble base in the left image loaned by my friend french ham Thierry F5SIB.
I also work CW with the recently acquired MFJ-564B iambic dual paddle key as you can see on the right image. Also a very good CW key for the relation price/quality. Very soft the paddles ( it feels like the piano keys :) ) and a very heavy and steady metallic base. It does not go anyware whyle you key :)
Watch the video in youtube site:
Pse, click on my HRDlog.net map for larger view and then click on the rounds, squares and triangles modes to see the call sign of the DX QSO and DXCC date and hours and other infos of the qso�s i had done.
Last hour HRDlog.net contacts
Some of my QSL (iQSL) of HRDLOG.net
This was an International Space Station (ISS) SSTV image i received on 12 April of 2015 at the downlink frequency of 145.800 MHz related to RS0ISS. ISS Low Earth Orbit (LEO) Station did a very nice passage elevation angle over Portugal in that day.
Other huge passion i have its in amateur radioastronomy. Im an amateur radio astronomer working the fade received radio signals of the sun and the Low and Short A and B level radio bursts of jupiter�s magnetosphere, meteor scatter, electrical lightnings of all around the world, amateur SETI in the hydrogen line and also scattering the hydrogen line cosmic background noise radiation in the microwave region of RF spectrum.
My actual project is one of the more hard to achieve from all radio astronomy projects i�ve been done: The reception with an home made radiotelescope for the 10 Ghz RF spectrum region to receive pulsars RF emissions. (the construction of this receiver with the cooled compressed freon gas low noise -7� celsius with a 3200 Kelvin temperature 20 dB�s pre-amplifier and parabolic dish are actually in working progress.)
The parabolic dish will be actually 2 reflectors (one main and a second concave ellipsoidal reflector gregorian system to achieve an aperture gain eficiency over 70%).
I will finish it in the next 2 moths i hope :) Maybe i will test "the first light" of this new radiotelescope lestening to the beating of the pulsars in March or April of this 2013 year :)
At the same time i am doing this radiotelescope receiver, i�m gathering some schematics to start to build a QRP transmiter with 1 watt e.i.r.p. power for the kilometric band (2222 meters) to work from 135.7 to 137.8 Khz frequency on CW, QRSS (for the very slow CW to extract with a computer sound card and special software characters from below the audible noise floor) and 200 HZ narrow band digital modes.
Imagine the head hake construction for the antenna to work on this band!!! :)
And now that in Portugal, we receive the good news from ANACOM about the new Ham band of 630 meters allowed for the Extra Class (Class 1 CEPT) Advanced Class (Class A) and General Class (Class B), i am considering in build this kilometric transceiver including also the 472 Khz - 479 Khz.
Untill then, i insert here some results in spectroscopy and spectrograms of my homemade radiotelescopes.
The next image below its one of the first radioimages of asteroids i�ve done using the hybrid technic of doppler active radiotelescope radio wavelength emition combined with virtual computerized colorization. So this means that this image its a virtual radio image of a celestial body, in this case, the Asteroid TU 24 with 17th days of exposure resulting from the emition of radiowaves from the arecibo radiotelescope.
The doppler radio waves transmited by arecibo were then reflected by the asteroid and then received by my radiotelescopes and with all the raw data i rebuild line per line the variation in S-units with a simple linear scale programmable database from 0 to 9 intensity and A to I in color depth.
Since i was unable at that time to receive the true variation in time of doppler radio waves trasmition, i lost a lot of resolution.Therefore i had to rebuild an relative reading of raw data acording to variations in shape and size magnitude of this celestial body (with normal variations in phase incidence angle etc etc..)
Anyway, it was a good experience and a great school to the arts of technic of radio emition and reception for me at that time.
This image would be impossible to see with visible wavelengths (light) because this type of body dont reflect almost any quantity of visible light, therefore, using the radio wavelength its the more possible technic to observe this kind of dark celestial bodys.
The next image below, its a screen shot of the spectrum lab, a spectrogram software that runs in windows operating system enviroment.
It is a spectrogram of other of my radiotelescopes for the meteor scater or meteor reflection.
The principle its very simple. In fact, it can be one of your first radiotelescopes exacly because you dont need very complicated antennas neither very complicated receivers and software.
This one was made tuning to a vhf taxi central call of spain with my homemade 3 El yagi antenna with an 20 dB�s amplifier beamed to barcelona region.
When a Leonids meteor shower passed trough Earth and some entered in our atmosfere, due to its speed, angle and mass, it started an ionized layer all around the meteor.
These ionized layer of atmosfere around the meteor reflected the radio signal transmited by the taxi central call of barcelona,
Of course, i received that signal with my rigs and this spectrum lab audio spectrogram.
The results are seen in the picture as falowed:
(and yes, of course i eard the signal in my radios :) )
I also participate in sharing the meteor counting on the radio meteor observatory site. I am the first Portuguese radioamateur and amateur radioastronomer in this project and that i am aware of it the only one untill the present moment i write this in 22-05-2013. Pse go here to see hourly updated live infos of meteor countings from my radiotelescopes and click in the unique balloon in Portugal. Thats me:) :
My radiotelescopes works with FFT and DSP spectrograms like Baudline for mac, DL4YHF Spectrum Lab and HROFFT for automaticly count the number of meteor events. I already share this meteor countings in the 2005 in the radio meteor observatory site, but then i leave the project.
I think i will restart the project agn :)
The G.R.A.V.E.S. (Grand R�seau Adapt� � la Veille Spatiale) French militar Radar located in Dijon. The carrier of the Radar at VHF in 143.049.750 USB and 0.780 Khz audio frequency received by my radiotelescope.
The vertical trace at 1424 UTC covering all audio frequency in the total bandwidth in the HROFFT spectrogram its from electrical origin of some kind (electrical lightning, sparks of combustive engines, neon and fluor bulb starters and so on. This list of RFI, QRM and QRN never ends :) )
Another interesting spectrogram with the DL4YHF Spectrum laboratory spectrograph software. The very fade pulse echoes of G.R.A.V.E.S. radar at every 5 seconds over the 0.750 Khz audio frequency carrier region at 0.900 Khz.
G.R.A.V.E.S. Radar radio signal reflected by ionized meteors at 0.960 Khz of audio frequency at 143.050.00 Mhz. The doppler echoes were then counted by the HROFFT software resulting in a total amount of 5 meteors.
you may watch a video of one of my radiotelescopes detecting a S-Burst of the magnetosphere of Jupiter:
Here in this 2 animeted Gif�s of Jupiter we can see how the magnetic poles have some degree of inclination from it�s axis and how one of the natural satellites of Jupiter, in this case, IO, directs and contribute for the increase of gain of the RF L-Bursts and S-Bursts of Jupiter�s magnetosphere with the Sun charged particles as they colide through the magnetosphere.
Examples of Jupiter Magnetosphere S and L-Bursts.
I like to use the software Radio-Jupiter Pro3 for the Jupiter magnetosphere IO-A and IO-B RF Bursts predictions. It is a very accurate prediction software and a very usefull tool for this kind of radioastronomy natural signals detection.
My homemade radiotelescopes tuned to the 15 meters band to lesten the RF Jupiter magnetosphere are usefull also to receive the RF bursts of the Sun Coronal Mass Ejection. Here an example of a RF Solar Burst of Coronal Ejection:
Still in the 15 meters band, beside the L and S Burst RF Jupiter Magnetosphere and Sun emitions i detect also the Milky Way Background RF Noise.
Here is an example of that kind of Spectrograms:
I like also to detect the Ionoprobes (Ionosonde) at 15 meters band using the same Radiotelescopes that i built for the L and S Jupiter�s Magnetosphere Bursts. Here is an example of an Ionospheric index reflection measurement:
And here is an example of the Ionoprobes (Ionosonde) "Chirps" typical deviation spectrograms of about 1 second or so each.
And here is an example of an HF radar Coastal ocean dynamics applications radar "CODAR" detected by my receivers and transceivers in diferent HF bands from the NOAA family doppler systems used to map the size of sea waves with the RF echoes signal scattered by the sea waves centered on the 14195Khz:
My seismic earthquake detection with my Sudden Motion Sensor of my macintosh computers.
I know all the time when it hapen an earthquake :)
And this are the WEFAX of NOAA 18 weather fax satellite images received by my station in last year of 2012.
Lately i am not doing more the reception of NOAA WEFAX satellites family.
I have so much activities in the radioamateur world including satellites and Moon Bouncing EME that reaaly i dont have time for it.
But soon i will receive some more.
And this is the software i use for my Macintosh computers for Satellite tracking and control of azimuth and elevation rotors, the MacDoppler:
One of my future plans is to develop a radiotelescope doppler RADAR system to search and visualize the asteroids orbiting our solar system:
And this is the TS-870RC app i use to control my Kenwood TS-870 with my mac.
And this is the Morse Code Machine software for windows developed by my friend Bruno Ramalhete to help radioamateurs and non radioamateurs learning Morse Code. I am the Beta Tester for this software. You can click on the link of the Bruno Ramalhete blog to read more about it and instructions to download the software : http://www.pceconsolas.blogspot.pt/
This is the last updated version at the present date of 26th December of 2013 from Bruno Ramalhete developer.
Stay tuned, i will put more images of my radiotelescopes analysis, and also more pictures of my home made antennas and electrical home made circuits.
I like to build my own antennas and electrical circuits.
I build all my systems at 21 years.
My last three electrical homebrew circuit projects i�ve done were the satelite interface tracking device, a receiver for the 15 meters band with GasFet pre amplifier of 20 dB�s to receive the very fade signals from the jupiter�s magnetosphere as well sun proton emissions and a VLF receiver for the kilometric RF spectrum region to receive the radio signals from all the lightnings around the world.
My 3 last antennas i�ve been built were the Cat�s mustache fan dipole, an antenna to work in the 10,15,17,20 and 40 meters HF band also 6 meters with the 3rd harmonic of the 17 meters dipole element installed inside the attic (loft) with an area of 10X10 meters square and 2.5 meters tall of an 3rd floor building, a portable dual band VHF UHF yagi with 6 elements for satelite field operation with portable VHF UHF dual band transceivers with a relative gain of 8 dBi in UHF and 6 dBi in VHF and an umbrella parabolic dish with 3 meters diameter (20 dBd) for the amateur SETI to work in the 1.4Ghz spectrum region.
I wrote a breeve summary of my station below this 6 pictures:
My station at November 25 of 2013. Now beyond the 2 main tables with all my rigs i have 2 more tables, one on the left side for electronics homebrew electrical circuits and antennas and the other table on the right for papers, documents, radio parts and acessories as well other notes related with the hamradio world :) It is now a dedicated room for shack :)
My Shack at January of 2014 already with my Oscilloscope Tektronix Type 454 :)
And this is my Oscilloscope Tektronix Type 454 with 150 Mhz of BW bought at 2014 :)
Go here to watch a video of my station :
Kenwood TS - 870
Kenwwod TS - 450s
Kenwood TS - 480 SAT
Icom IC - 7100
Icom IC - 706MKIIG
Yaesu FT - 847
Yasu FT - 817ND
Yaesu FT - 857D
Kenwood TS - 2000
VHF UHF Mobile radio:
Alinco DR - 605
Professional VHF Mobile radio:
Motorola GM 340
4 Meters Professional radio:
Alcatel 9223 MX
10 and 12 meters all mode mobile radio:
Home made radio-telescopes receivers and brand scanners and receivers:
Home made 5Khz to 10Khz VLF radiotelescope receiver for lightnings, "sferics", "tweeks" and "whistlers".
Home made 15 meters radiotelescope receiver for Sun protons RF emssions and jupiter�s magnetosphere RF with home made 20dB�s Gasfet Pre-Amp.
Akai WFM tuner for meteor scatter with a home made 10 dB�s gain pre amp.
Icom IC-PCR 1500 SDR multimode multiband scanner and radio telescope with home made gasfet pre amp�s to work from 150Khz to up to 3.3Ghz
Alan 1 FM AM scanner
Home made transmitters:
1- Home made kilometric 2200 meters LF band 137,5 kHz CW Transmitter/Oscilator for Morse Code telegraphy transmission with 100 watts P.A. (1 P.I.R.E.)
1- Home made hectometric 630 meters MF band 472-479 kHz CW Transmitter/Oscilator for Morse Code telegraphy transmission with 100 watts P.A. (1 P.I.R.E.)
Portable VHF UHF transceivers:
Professional portable VHF
Portable 10 and 12 meters All mode:
Albrecht AE-2990 AFS
Portable CB AM FM:
Alan 42 Multi
1 portable PMR 446 Haeger :)
2 portable PMR 446 SilverCrest (LIDL) :)
2-portable CB Great
2-portable CB Sharp Touricomm
1-Cobra 19 Plus AM CB
CW Morse Code keys:
1 - MFJ-564B dual iambic key
1 - Hi-Mound MK-705 dual iambic key loaned by F5SIB
Tools for control and instruments for mesuring:
1-Home made interface satelite tracking controled by my MacBook Intell with MacDoppler satelite tracking software for Apple Macintosh
1- Homemade DIY ( Do It Yourself ) 4 meters 70 MHz antenna tuner
1-Homemade computer to transceiver USB interface for digital modes
1-Homemade interface transceiver to osciloscope AM SSB modulation meter adapter
1-Oscilloscope Tektronix Type 454 with 150 Mhz of BW
1- EuroCB MD4 external S-meter
3-Power and VSWR meters
1-HP frequency meter with 9 digits
1- frequency meter with 5 digits
1- MFJ Multimode Data Controller MFJ-1278
1-Audio line and microfone Mixer with 5 tracks
1-Antenna tuner MFJ Versa Tuner HF 3KW series MFJ-989C
1-Antenna tuner 6-meters MFJ-903
1-Twin Tube oscilator to produce radio and audio frequency signals.
1-DC voltimeter and ampermeter
2-Alinco power supplyes DR-330 MVE 30 AMPS
1- regulated 30 AMPS power supply
1- Home made 50 Ohms RF dummy load 100 Watts
1- CW morse code Tutor MFJ-418
1- IberoSat Satellite Finder analog signal strength meter
1- Homemade End Fed Wire 54 meters long with UNUN 9:1 working in all bands MF, HF and VHF from 160 meters band untill 6 meters band.
1- Homemade End Fed Wire 16 meters long with UNUN 9:1 working in all bands MF, HF and VHF from 160 meters band untill 6 meters band.
1-Homemade cat�s mustache fan dipole for 80, 60, 40, 30, 20, 17, 15, 12, 10, 6 and 4 meters.
1 - Homemade Helical (slinky) 160, 80, 40 meters dipole.
1- Homemade delta loop for the 4 meters 70 MHz band.
1 - Homemade delta loop for the 6 meters 50 MHz band.
1 - Homemade mobile quarter wave 160 - 80 meters band (4.5 Meters tall) antenna
1 - Falcon D-Original Outback - 2012 ( 80-2 meters ) 12 bands Mobile antenna
1-Homemade 5 elements VHF 10 dBi�s and 8 elements UHF 12 dBi�s dual band yagi.
1-Homemade 2 elements VHF 6 dBi�s and 4 elements UHF 8 dBi�s dual band yagi for satelite field TX operations
1-Homemade 8 elements UHF 12 dBi�s yagi
1-Homemade dual band VHF UHF dipole
1-Homemade vertical ground plane 1/4 wave length for 20 meters band
2 -Homemade dipoles for 15 meters conected in phase for the jupiter�s magnetosphere radiotelescope
1- Homemade vertical helical antenna for the kilometric VLF (30 Khz to 100 Khz) for lightings radiotelescopes
1- homemade Helicoidal antenna for the 1.4 GHz amateur SETI and cosmic background microwave noise
1- Homemade Helicoidal antenna (Cantenna) for the 2.5 Ghz
1- Homemade Bar antenna for the VLF 7 Khz RF spectrum region
1-Homemade umbrella 3 meters diameter parabolic antenna for the amateur SETI and cosmic radiation
1-Homemade 10 meters (1,20m length) vertical portable antenna for albrecht AE2990 AFS
1-VHF-UHF Diamond X-50
1-VHF-UHF Diamond X-510
1-Diamond Supergainer SG7900 VHF 5dB UHF 7.6dB mobile antenna.
1-Santiago 1200 mobile antenna
1- 10,11 and 12 meters Sirio 827
1- Sirtel mobile antenna for 11 and 10 meters with magnetic base
1- Helical reception antenna with wide coverage band Albrecht Eurostick - DX 25-2000Mhz
1-Portable VHF 3dB - UHF 5.5dB telescopic antenna Diamond RH770
Several portable antennas including originals from portable radios
10 meters CTE mosfet 100W FM/CW 200W SSB
10 meters Homemade mosfet 50 W FM/CW 100W SSB
10 meters 25W mosfet portable linear amplifier
10 meters 50W CP-100
Syncron 10 and 11 meters 30dB�s RX Low Noise Amplifier
Homemade VHF Low Noise GAs-FET RX amplifier with 21 dB�s for EME moon reflection and meteor scatter
Homemade 1.4 Ghz 26dB�s Low Noise Amplifier for the Hydrogen Line region,
Apple Macintosh Performa & OS 9
Apple Macintosh Ibook G4 portable computer & OS X Tiger
Apple MacBook Intel portable computer & OS X Yosemite
Acer Aspire One netbook & Windows XP
Intel Pentium IV @ 3Ghz & Windows 7
Samsung Galaxy Grand Neo Duos with Android OS Ver 4.2.2 Jelly Bean
Tablet ZTE E8Q with Android OS Ver 4.4.2 Kit Kat
1-Heil PR 781 with home made PTT
1-Home made pre-amplified with roger beep microfone
1-Alinco EMS-14 with pre-amp
1-sadelta CM-40 Special with pre amp and roger beep
1-turner expander 500 with pre amp
Also, i have all transceivers original microfones
Here you can see some detailed pictures of my station:
"New kid on the block" HI HI :) My new Icom IC-7100 HF VHF UHF D-STAR and 4 meters band all mode all band bought in 13 of July of 2015 to join to all the rest of my "Fleet Armada" of transceivers HI HI.
This is my brand new "Star" in my shack: Transceiver all mode all band Kenwood TS-2000 bought at (3 hours ago ah ah) 10th July of 2013 :)
Pse watch the video on youtube here:
This is a picture of my shack on 19th July of 2013. I need to buy a new chair and table :)
Pse, go here to see my Ustream live video and audio streaming of my radioamateur activities
wow well, now that i am sharing my shack with you, i will share also a picture of my 2 electrical compounds box. Its a main and vary important part of my radioamateur activitys to build my homemade electrical circuits so therefore its an important part of my shack :)
And this is the table with the tools to build my homemade electrical circuits:
A detail of my VLF receiver construction here in a bread board for testing the dual Op. Amp. electrical circuit configuration and to detect some over reacted signal to noise ratio or other kind of RFI and noise figures. Of course, at this stage, its far way from being finished:
Already in the PCB working progress of welding the electrical circuit compounds with all the variable resistors and switches hung :)
And the next 2 pictures are a detail of my VLF radio telescope receiver PCB totally assembled to work on the 15 Khz band.
You can see the variable resistors to control the OP AMP RF gain of first stage and AF amplitude of second stage as well the headphones :) In fact, this radiotelescope receiver can work like an walkman in portable receiving operation:
And in the next picture, the PCB VLF radiotelescope receiver already with the crocodile wires conected to PCB ground and antenna terminals. Here the PCB was conected to the Computer for testing the "first light" to analyze and search for the harmonics RFI to see if all its in normal standards for this type of RF OP AMP amplification.
And here, the VLF receiver with all electrical compounds including variable resistors mounted in the PCB.
The "first light" of this radiotelescope for the VLF was trully a huge success!!!
I receive the first "sferics", "tweeks" and "whistlers" now using a much better headsets. I felt happy with the results as a young child after receiving a new toy!!! :)
And this little small yellow PCB circuit in this picture above is my Homemade 137,5 kHz CW Transmitter/Oscilator working on 2200 meters band for Morse Code and computer D.S.P. QRSS!!! Only with a binary counter and no VFO :)
And here you can see the CW Transmitter/Oscilator for 137.5 kHz with the P.A. finally assembled testing the secondary R.F. transformer and final adjustments.
My Homemade DIY ( Do It Yourself ) 4 meters 70 MHz antenna tuner with simple 12 V lamp for VSWR visual check done with all reused electronic compounds.
This is the MFJ 6 meter tuner that i changed to tune also on 4 meters band installing a diferent inductive coil in replace to the original and i also installed inside a tuner/bypass direct circuit DPDT on on type switch.
This is my homemade rewired portable Bar Antenna for VLF to work on 7Khz RF spectrum. In fact it works as a E-Field Probe.
A tipical spectrogram of my homemade VLF receiver with a relative strong "whistler" at the same time with "sferics" on the 5 Khz VLF RF spectrum region.
I will put here more spectrograms of my VLF radiotelescope everytime i have good signal readings.
And this is my homemade regulated DC power suply for testing my homemade electrical circuits with its primary and rectified, anti-ripple filtering and regulated voltage circutry:
And this is an old Reace RF power and SWR & modulation tester meter for the HF high bands short wave but i am preparing it to work also on the 630 meters band and also on the 2000 Kilometric band. I said also, exacly becasue i dont whant to destroy its hability to mesure on short wave band as well :)
Here are pictures of some of my homemade antennas. I will insert here soon a lot more pictures of my homemade antennas as well some more electrical home made systems and electrical circuits:
Homemade Portable VHF 2el 6dBi UHF 4el 8dBi for field Satellite Yagi
Homemade UHF Yagi 8el 11dBi
Feel hungry? Or the need to TX and RX in 2.4 Ghz? Why not doing both things at the same time? HI HI HI :)
This is my homemade (Can) tenna ( antenna made from a can ) to work on the 2.4 Ghz RF spectrum region.
I build it in 2009 but i made some changes in the driven element and in the directors. Now (2013) it has more gain and a bigger bandwidth.
My homemade huge 1.5 meters portable wip antenna for 10 meters band in my Albrecht AE 2990 AFS with the green 2.5 meters ground wire attached to the PL plug.
With the Albrecht AE 2990 AFS and this antenna i already make some contacts and qso�s on 10 meters New York repeater in FM on 29.620 Mhz only with no more then 2 Watts that is the power of this radio with internal batterys!!!
It is still a portable antenna HI HI :)
A detail of the reductive coil. The whole wire inside the antenna structure mesure 2.5 meters including the spiral turns of the reductive coil.
Here is a detail of the 2.5 meters ground wire for the 10 meters portable antenna pluged to the PL ground.
Homemade VHF 5el 10dBi UHF 8el 12 dBi Yagi.
And where are all my homemade antennas?
They are not on the roof!!! :)
The only ones you see there are the TV WFM VHF UHF common antennas:
There they are! :)
My homemade mustache cat dipole to work from 40 meters to 6 meters band including all WARC installed inside the attic in a building with 3 floors high along with my homemade ground plane isotropic VHF UHF dual band antenna.
It is installed already at one year. As you can see, a spider already decided to make her own house in my homemade mustach cat dipole HI HI :)
The following image is a detail of my homemade recoiled balun 1:1 with low oxigen coper to decrease the losses.
Also all the wire band elements of this mustach cat dipole are made of thick 6 milimeters low oxigen copper, once again to avoid more losses.
here is a detail of how elements are installed in the wood roof structure:
And here is a detail of the reductive coil for the 40 meters band becasue i have only 10 meters of attic. It is important the quality of this coil to maintain proper electrical wavelength and proper ressonance with reduced physical length:
And this is my homemade vertical ground plane dual band VHF UHF with 4.5 dB on VHF and 7,2 dB based in the model of Diamond X-50.
I build it with pieces of other ham broken antennas and PVC pipes. The active driven element is made of low oxygen multiwire copper streched inside the PVC pipe shell and fixed to the edge of the PVC pipe.
Whitout any problems it received signals of 59 and put TX signals of also 59 in phone SSB in france germany Italy UK etc in sporadic E propagation.
And this is a detail of the base of this antenna. Becasue it is not on the roof and away from strong winds it isnt fixed to the ground.
So i used a plastic base prepared to be filled with water to increase wheight in center of gravity:
I will put soon more pictures of my installed homemade antennas in the attic.
And this is my commitment and contribute to space scientifical research and odissey :)
My name and Ham call sign in the messages microship inside of the cube micro satellite F2-Cube nano SAT:
F-2 Nano Satellite conceptual design FSpace Laboratory Ha Noi - Viet Nam, the satellite that will carry my name, radioamateur call sign and message to space :)
This time my name and callsign will fly over to MARS on the INSIGHT space ship NASA mission: "InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) is a NASA Discovery Program mission that will place a single geophysical lander on Mars to study its deep interior."
Cooperation and Contribution with Ham newspapers, Ham magazines, Ham radio clubs and other Ham activities:
- Cooperation and contribution with Portuguese AMRAD ham radio club to its newspaper n�5 of June 2013 with the technical article i had wrote about my homemade HF and VHF UHF attic (Loft) antennas i had built.
- Cooperation and contribution with Portuguese AMRAD ham radio club to its AMRAD newspaper n�7 of December of 2013 with the technical article i had wrote about VLF.
- Cooperation and contribution with Portuguese AMRAD ham radio club to its AMRAD newspaper n�8 of March of 2014 with the technical article i had wrote about my homemade VLF electrical circuit receiver i had built on October�s 2013.
- Cooperation and contribution with Portuguese AMRAD ham radio club to its AMRAD newspaper n�9 of June of 2014 with the technical article i had wrote about my homemade VLF antennas.
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 386 of November of 2013 with the technical article i had wrote about my homemade HF, VHF and UHF antennas instaled inside the attic (Loft) with the name "radioamateur invisible antennas and HF radioastronomy".
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 387 of December of 2013 with the technical article i had wrote about VLF.
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 388 of January of 2014 with the technical article i had wrote about my VLF homemade circuit receiver.
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 389 of February of 2014 with the technical article i had wrote about my homemade VLF antennas.
- Cooperation and contribution with Portuguese ham radio club ARLC in December of 2013 with the technical article i had wrote about VLF.
- Cooperation and contribution with Portuguese ham radio club ARLC in January of 2014 with the technical article i had wrote about my VLF homemade circuit receiver.
- Cooperation and contribution as Beta Tester for Bruno Ramalhete software developer for the "Morse Code Machine" application.
- Cooperation and contribution with conceptual design FSpace Laboratory Ha Noi - Vietnam with my name and CT7ABI call sign inside the F-2 Nano Satellite microship ( CT7ABI call sign in space!!! HI HI HI :)
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 390 of�March of 2014 with the technical article i had wrote about Morse Code learning with the title "Morse Code, a Cerebral Thing".
- Cooperation and contribution with Portuguese AMRAD ham radio club to its AMRAD newspaper n�10 of�September of 2014 with the technical article i had wrote about morse Code learning with the title "Morse Code, a Cerebral Thing".
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 391 of�June of 2014 with the technical article i had wrote about�Amateur Radioastronomy�with the title "Jupiter magnetosphere Burst Detection".
- Cooperation and contribution with Portuguese AMRAD ham radio club to its AMRAD newspaper n�11 of�December of 2014 with the technical article i had wrote about Amateur Radioastronomy with the title "Jupiter Magnetosphere Burst Detection".
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 392 of�August of 2014 with the technical article i had wrote about� my homemade radiotelescope receiver for 15 meters band to work on the reception of Júpiter magnetosphere Bursts, Solar Bursts and Milky Way background noise.
- Cooperation and contribution with AMRAD ham radio club to its AMRAD newspaper nº12 of March of 2015 with the technical article i had wrote about� my homemade radiotelescope receiver for 15 meters band to work on the reception of Júpiter magnetosphere Bursts, Solar Bursts and Milky Way background noise.
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 393 of�September of 2014 with the technical article i had wrote about my homemade LF CW Transmiter to work TX CW Morse Code on the 137,5 kHz 2200 meters band.
- Cooperation and contribution with AMRAD ham radio club to its AMRAD newspaper nº13 of June of 2015 with the technical article i had wrote about� my homemade LF CW Transmiter to work TX CW Morse Code on the 137,5 kHz 2200 meters band .
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 394 of�October of 2014 with the technical article i had wrote about my homemade LF P.A. for TX CW on 137,5 kHz 2200 meters band.
- Cooperation and contribution with AMRAD ham radio club to its AMRAD newspaper nº14 of September of 2015 with the technical article i had wrote about� my homemade LF P.A. for TX CW on 137,5 kHz 2200 meters band .
- Cooperation and contribution with Portuguese ham magazine "QSP" n� 395 of November of 2014 with the technical article i had wrote about my homemade LF antenna for TX CW on 137,5 kHz 2200 meters band.
- Cooperation and contribution with AMRAD ham radio club to its AMRAD newspaper nº15 of December of 2015 with the technical article i had wrote about� my homemade LF antenna for TX CW on 137,5 kHz 2200 meters band .
Wow, by the way, i really can not resist in sharing with you OM my beautiful lovely friendly animal companion. I adopt this cat with already 7 years old. Now already have 12 years old but still in very very atletic good shape like a young tiger HIHIHI. Since then i realize it was one of the decisions i had done more important and well done in my entire life! :) HIHIHIHI
Its my cat with the name "Pantufas" and it means winter sandals. HIHIHIHIH it was not me that baptized the cat. Someone had already done that before i adopt the cat:
Isn�t she lovely? :)
My dear OM, this page is still in working progress so i will put in this site of qrz.com more data in time.
You can google it my old class 2 call sign (CS7ABI) (http://www.qrz.com/db/CS7ABI ) to watch some videos of DX Qso�s i�ve done on ham satelites that some radioamateur friends from all around the world recorded and put on youtube and other personal blogs.
For more videos of all my activities in the radioamateur world pse go to my youtube channel : http://www.youtube.com/roquefernando1
I have my biography also in http://www.cqfriends.com/user.asp?username=CT7ABI
and also in
Keep in touch, good DX,
and feel free in asking me wathever you may whant to ask.
Please, add my Skype and OOVOO user name to your contact list:
Skype user: CT7ABI
OOVOO user: ham_omega
CT7ABI/M CT7ABI/P CT7ABI/MM CT7ABI/QRP
Also licensed Citizen Band Station by ANACOM with the name Omega on 11 meters (Esta��o CB Omega) and with the Papa Tango DX Radio Group call sign 31PT140, as well with the 31CT14 call sign registered at qrz11.net and qrz11.com.
PMR 446 user with the registered number PMR1457 on PMR Portuguese site http://www.pmr446.org/
This site no longer exist now so i have a new PMR call sign registered on the new PMR 446 Portuguese register site at http://pmr-446.org/lista.html
My new PMR call sign number is BRR1457.
Below i leave you here my HRDlog.net qso map, visitors maps, solar terrestrial and propagation HF VHF conditions, and some gadgets widgets and other apps with several kinds of meteorological, propagation and usefull informations:
Near-Real-Time F2-Layer Critical Frequency World Map. Provided by STD
Near-Real-Time E-Layer Critical Frequency World Map. Provided by STD
Near real time MUF(3000)F2 world map. Provided by STD
D-layer Attenuation (Maximum Absorption) in dB´s
Weather Sat in Europe
Click in the image for larger view of my HRDlog.net qso map and then point with the mouse in the color squares to see the call sign and hour with date and locator of the QSO i had done.
Portuguese Search And Rescue (S.A.R.) Area
Portugal is the 3rd biggest exclusive economic zone in European Union and the number 11 in the world.
This is the Portuguese Map with the exclusive economic zone and also with the 3 main Portuguese archipelago Islands of A�ores, Madeira and Berlengas totalizing�89 Portuguese Islands and Islets�and 27 main Islands.
7273691 Last modified: 2016-04-27 23:22:57, 94808 bytes
You must be logged in to file a report on this page
Book Totals: 133 qso's 93 confirmed Get a free logbook at QRZ.COM