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Prize Winning GS-31 Amp by Bob, VK3ZL

Bob at the SERG convention 8 June 2008

First prize for advanced home brew competition SERG convention June 8, 2008

Now the details...

Assembled box for GS-31B amplifier

750pf Vac variable anode tune..Note cap is mounted with clamps taken from old electrolytic capacitors

Various hand made chokes for GS-31B amplifier

Pre drilled and etched front panel GS-31B amplifier

Input assembly GS-31B amplifier..Filament choke and B-minus RF choke and bypass caps

18uh inductor for GS-31B amplifier hand made with 5/32 hardened solid copper wire....I didn't bother to make smaller aux coils for 30 and 20 meters as I am unlikely to use those bands..20 and 30 are tapped into main inductor

Behind the front panel

Completed GS-31B amplifier

Sub chassis GS-31B amplifier completed

Top view GS-31B amplifier..Power transformer from AL80B

all pictures used with permission of VK3ZL

 

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