Single 4CX250 tube amplifier.The first i made, give about 300W max on 2 meters. Below,23cm 60W with 2C39.
I will be pleased to help you if you if you need and plan to build one of those amps. |
23 cm quarter Kw cavity amplifier with Gu-7 russian tube, design from CT1DMK ( See his PAGE ) and 1Kw vhf amp in construction. Two new tubes, GS35 and GS31.Tnx to JA8FDT who sells all kind of Russian tubes. GI-7 2 meters amplifier.The idea was to make it the smaller possible.Size is: 25(w)X25(d)X15(h,cm),complete, including coax relay ,PS etc.Max power i have been able to get was 250W.I will include more info on it when it will be completely finished...
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turns of the segundary winding removed.It is not quite powerfull enought,so i can only
get about 200w out from this amplifier.If i can find another transformer identical to this
one,i will put two of them in parallel.A place inside the enclosure is reserved for this.