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Geloso G.222 TR help
nierveze wrote:
hello again Frank, as there is no indication in the documentation of what is the normal output power of the vfo,maybe it would be useful to use new 6cl6 and 5763,also an indication of grid excitation is useful,on my set the excitation potentiometer is about 1/4 turn to get the 3.5 ma required on 80M with the driver tuning condenser correctly tuned,this can be checked in RECEIVE position of the transmit/receive switch(but this has maybe been modified in your set I see I have VFO output when the switch is on the VFO-BEAT position but the output to the grid of the 6146 is smaller than that I can measure in AM position. I need to check from the schematic if this is correct. ) AND the am/vfo-beat/cw switch in vfo-beat:this powers up only the vfo,not the pa ,this is used to tune the tx to the rx frequency(heterodyne).In this condition you can get an indication of the excitation,without using the pa,you should not have hv so no risk for the pa tube,but I am just wondering what are exactly the modifications don on your tx... -why not try to put it back in its original condition by removing all those relays this isn't possible, the original T/R switch is missing, at its place there is an on/off switch that just energize the two added relays. The DC for the relays has been obtained with a doubling rectifier on the 6.3V AC heather supply. Hope this helps 73 alain F1gqb thanks for your suggestions for the rx,I already dit it :-((( Thanks Frank IZ8DWF |
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