|The "team" today|
After a few false starts with the PSU arrangement we fired up the transmitter into Andrew's inverted-L antenna and had almost immediate success with a QSO (following our CQ) with K1GDH (Ed) near Cambridge USA who was running 5W and gave us 539.
Our power out was 400mW. PSU was nominal 24V AC @ 500 mA plug top followed by doubler for about 74V no load and 72 on load. Grid Block keying uses -36V rail. In all 3 diodes, 3 caps, 3 bleed Rs. Very simple, fairly safe also. Filament supply is 5V DC plugtop [stabilised] and 18R resistor which gets warm!A second Sputnik rig is being built now and all being well we will be on the air on Oct 4th (Sputnik Day) to try for some more QSOs.