Hello dr. YL, XYL, OM
i´m mostly interested in contesting. Running a FLEX 5000A with second RX.
Amplifiers are an old russian LV6 and a Heathkit SB221 amplifier.
Antennas in use are Quad and Vertical Antennas (80 + 40m). Also an 5m diameter magnetic loop for RX is in use.
Project in 2010 is an homemade amplifier with the amperex YD1150B. Thats an industrial triode, capable for 6kW anode dissipation.
Antenna project in 2010 is a spitfire version for 160 and 80m, maybe a tripple endfire for 40m :-)))))
A spitfire version for 40m is perfectly in use. F/B <=30dB; G 6dBi
The amplifier project is still on hold. There are too much interrupts by building antennas
Project in 2011 is a hexbeam runningas an 2 element broadband on 40m and a shortend version vor 80m. If running well, this will substitue the 80m vertical antenna.
End of 2011 a heart attack stroke me down. So i will be off air up to february 2012. Sorry for that, so no qsl´s and so on.....
Think to rearrange my projects and former life. Durnig my residence in hospital my collegas DL1LUI and Dennis built an HPSDR for me. I got it just right befor i had to stay at rehab. Very much thanks to them. Now i change my domicil and built up a new station based on FLEX5000 and HPSDR. Also i will comprise some transistorisized amplifiers. Further no tubes . I bought a used aluminium tower. At my new domicil i will built there the 80m Version of my hex antenna.
One of my hexbeams is a receiving antenna of DR1A, where i´m a member of the group. www.dr1a.de
in my job as an hf engineer we try to use transistors for getting a plasma. For that we use the transistors as an amplifier. First tries with this transistors were startet in use as an amateurradio amplifier on hf and vhf with great success.
first prototypes of an short wave amplifier with the freescale MRFE6vp61k25 MOSFET is running. two items of the transistor are swichted in paralell and producing about 2 kw. Same type is running on 144MHz and runs also perfect. More soon or via email
Amplifier Blockwith 2 times MRFE6vp61k25 or BLF578XR
Filterboard and controller, looks like a PC Box
some pictures of the hexers:
20-15-10m at 30ft/10m high -------------------------40m at 1m high, still equal to my vertical (12m diamater of spreaders)
Here is the 80m shortend version, also 40m fullsize. both are 2 Element antennas.
40m siganls are about 10db higher then the vertical antenna. 80m must be improved.
16m diameter @ 10m high. look at the smal horses right side down.
best to you
my old Quad magnetic loop 3m dia80m quater wave vertical
2427 Last modified: 2014-03-07 11:18:29, 5095 bytes
You must be logged in to file a report on this page
Currently updating logbook display.