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CT4RK Portugal flag Portugal

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See also my youtube channel on www.youtube.com/CT4RK

Please only e-QSL. No paper QSL...Please no dollars! I`m amateur radio not a commercial radio station. Hamradio is an Hobby not a business!

Hamradio since 1977.

Year of birth: 1959

Class: A (advanced)

I live since 1992 in a small coastal town of Portugal, called Sines, about 120km south of Lisbon. This small town is situated in a beautiful part of the Portuguese territory, known as Vincentian Coast, in Alentejo Litoral. Because Sines is surrounded by the Atlantic Ocean on all sides except for east, have perfect conditions for radio.

I was working during 22 years as antennas and RF high technician in high power radiobroadcasting transmitters in DW-WORLD Shortwave relay station in Sines(This station was completly dismantled in December 2012 ).

My first interest in Hamradio activity, is the homebrew. I`m a technician that love the "surplus material" the homebrew and the restoration, of old fastion transmitters and receivers.

I`m operative in the following bands: 80m 40m 30m 20m 17m 15m 12m 10m 6m 2m 70cm 23cm 3 cm. I`m looking for HF DV (digital voice) users with AOR ADR9000MKII OFDM encoder. IF you have this mode, please send to me an e-mail.

I`m ready to operate the following modes for the bands above.

Mode for HF: AM, CW, PSK, SSTV, SSB, FM, OFDM DV and DRM (listen only).

Mode for 2m: FM, AM, SSB, DV D-STAR, CW 

Mode for 70cm: FM, SSB, CW, DMR  and  D-STAR

Mode for 23cm FM,FMATV CW SSB

Mode for 3cm SSB, CW, FM

My rigs for HF bands are: Yaesu transceiver FT1000MP MARK V FIELD, A copy of FL2100 (completly rebuilded ) linear amplifier runing about 1,2Kw PEP output, an homemade 3 X 813 amplifier, (I`m rebuilding it for GU43B) runing about 1Kw RMS output, Yaesu FT901DM, two ICOM IC706MKII G (one is my mobil station) and an ICOM 7200 for HF and 50MHz. For FM, SSTV,PSK and monitoring, I use an Alinco DX77 transceiver, and also a YAESU FT747. In Mobil operation, I use the ICOM 706 MKII G. In HF portable, some times I use an old militar manpack radio, a ITT 20 TPL battery operated transceiver modified for amateur bands. On 6m, I use the IC7200, and the FT736R when working QRP mode. I would like teste D-STAR in lower bands like, 6m and 10m. I have a HX240 transverter, from TOKYO HIPOWER, that match perfectly with my ID800H D-STAR transceiver in low power mode. I have a  2X MFR151G or BLF278 MOSFET HF amplifier with about 700w out that I run now with the FT1000MPMKV field, (Adjusted to about 25W for drive the PA).  1,2Kw HF amplifier based on a BLF188XR, is under construction, and also under  modification for amateur band I have a FPA comercial  8 X MRF150 MOSFET 1200W 50dB gain linear amplifier. I have also some old fashion restored transceives. A FT200, FT101 first serie and a FT101E last serie. I have also a line from DRAKE, two T4XB  R4B and R4C receiver . I have modified a T4XB for AM only.


For AM, (I am GAP(Grupo AM de Portugal) member) I use two tube transmitters. One  GELOSO G222TR and an homemade  copy of this old fashion transmitter, with a 6146 plate modulated by two EL34 in P- P AB1 class, with STANCOR modulation transformer, runing about 50 W carrier. The receivers are GELOSO G4/214, G4/218. I have an old fashion, all tubes, cristal controled AM station for 2m, with a QQE06/40 screen modulated in the output amplifier, but my prefered AM station for 2m  is an crystal controled PHILLIPS solid state aeronautical 200W  AM transmitter in line with a PAE professional aeronautical receiver, descontinued and recovered from  an aeroport and modified for 144.550MHz.  I have the G4/152 2m tube converter, and the G 4/163 nuvistor 432MHz converter, that match with my 2m tube transmitter.

For 144MHz I use a a YAESU FT736R driving a 1000 watts (BLF 578XR) LDMOS homemade amplifier.  My other VHF rigs are:  ICOM 2100H, ICOM IC251, FT290R , IC706MKIIG, ICOM ID 800H, AZDEN PCS3000, BEGIAR TYPE2 and some portable transceivers . For working with FT290R, an ICOM IC251, I have also an homemade valve amplifier (QQE06/40)runing 120W on FM, and in AB1 class, 240W PEP in SSB! In the 70cm band i have ICOM 490E all mode trx, (10W) and also the FT736R, and the ID 800H. I have also a Hytera MD785 mobil  DMR transceiver, and a MD380 portable DMR transceiver.

The 23cm station is the FT736R driving a LDMOS (2 X MRF286) 170 watts home made amplifier. The ATV it`s all them homemade and have a 0.3 W sintetized TX driving an homemade 60 W dual module RA18H1213G amplifier. The RX are an homemade MGF1402 gasfet amplifier, a SHARP TUNER and an homemade base band processor. A GI7B amplifier for 23cm is hunder constrution.

On the 10 GHz band I working with a home made transverter based on a EYAL GAL module, with 2W output and a 20 dB Horn or 60cm dish. I only work  3 cm portable.  I have a home made power pack with a 12V -18 Amp/h battery inside and a step up buck converter to get a constante output voltage of 15V independent of the battery status.

Aerial system for sw: W3DZZ for 80-40 and TA33M for /20/15//10m

Aerial system for 6 m: ZX yagi ZX6-4 (at the moment out of service for maintenance)

Aerial system for VHF :9 elem beam vertical polarized, and a X50 vertical from Diamond

Aerial system for UHF :16 elem beam vertical polarized and the X50 Normally the X50 is all time on ID 800H for run D-STAR repeaters.

Aerial system for 23cm :20 turns RHCP helicoidal antenna

Aerial system for 10 GHz : 20 dB horn and 60 cm dish

HF pwr - Normaly 100W/1000 W PEP output

VHF pwr - Normaly 25W/1KW PEP output.

UHF normaly - 1 KW E.R.P

23 cm BAND pwr normaly more than 5Kw E.R.P.

3 cm BAND  about 5Kw E.R.P.

73 from CT4RK - Carlos Mourato


My workbench



Some of my test & measuring  equipment



My actual shack setup.


Another view of my radio room.


Receivers and computer rack.



My station in 1995................................................................................... My station in 2000


My station in 2008



Working in the new antenna system Thanks to CT1DIG ( now Silent Key) at left and my friend Carlos Nunes, to help me in this hard job.


The base of the litle tower


My friend carlos nunes do the job


The top section


My friend Carlos Nunes


Here is it


The 2m / 0,7m D-STAR and reserve X50 antenna.I use this antenna mainly for D-STAR service on UHF repeater, but also for reserve and air band listen


Heliax 7/8" cables for 2m, 70cm and 23cm bands. For HF YAGI I use 3/8" heliax cable...And the beautifull sunset over the Atlantic Ocean in Sines. (West view)


North view from my antennas. You can see the Atlantic Ocean in the horizonte.


W3DZZ dipole


West view. You can see again the Ocean.


Cables and blue sky on sunset.


Cables again


The tower in place


CT4RK in the top of tower mounting the antennas


Mounting the 23cm helical RHCP antenna


Something is wrong!


Oh my God!!! I drooped the screw!!


Well!!! Is done!!


Last inspection.





G1000DXC in place


Biginning to assemble the HF YAGI TA33M


TA33M assemblage in progress


Assemblage finished


A view of the antennas system


Cables down the wall.


The job finished


View to South


CT4RK runnig real portable station on 40m. This manpack is an old portuguese militar tactical transceiver, from 1970 decade, that was used by portuguese army in Africa. This an 20TPL transceiver from ITT - Standar Electric . This radio deliver about 10W PEP in SSB /CW and 5W in AM.


Walky Talky! Hi Hi.


This is a real "Portable radiotelephone" not a celular phone! HI HI.





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8095926 Last modified: 2017-05-14 20:04:37, 16778 bytes

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