"On june17th the stations DL2NDO and DJ2LF had a duplex QSO in cw, one way
on 8953Hz, the other on 10.368200MHz. Frequency ratio 1:1 158 067.
On 8953Hz DJ2LF transmitted 12W from an AF amplifier with 2 tubes EL12/375
via loading coil 0.4H and 136KHz antenna. DL2NDO's receiver from 0 to 30MHz
was homemade with a tuned front end for 8953Hz. Antenna 15m wire 10m up.
He transmitted on 10GHz with 0.2W and antenna 50cm diameter. The receiver
at DJ2LF site was an old wide band FM transceiver with gunnplexer and 100MHz
IF. To this IF a 1000Hz
ozillator was connected which always started when a strong carrier was
received. So the cw signals were copied clearly despite the gunnplexer. The
8953Hz link worked immediately, but not the 10GHz. The reason was: DL2NDO
put the 10GHz equipment behind the closed window. But the the window plane
was coated to avoid thermic losses. After opening the window the signal was
loud and clear. Distance about 1Km.
73 Walter DJ2LF ".....
Well done, gentlemen !!!!......that is what we call : FUN !!!! and i
didn't know that it will be possible to encounter radioham with gunplexer
and "100 MHZ IF" yet...I thought i was the only one, hi !!!! (but with FI
at 30MHZ, because on 100mhz near PARIS, it's awful !!!! hi !!!...We use gun
cavity for 10ghz atv at the radio club, but not yet in FM WIDEBAND....just
for FUN, we prepare a project to go FIELDAY and top mountain: 10ghz on one
side, and barbecue on the other...!!! hi !!!
(have a look at http://f6kaw.free.fr/ , hyper and laser page)....
Congratulations and cheerio !!!!......Pascal.....F5PNP......
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