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Author Topic: GS-35b legal limit linear for 75 meters  (Read 3367 times)
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AB2EZ
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"Season's Greetings" looks okay to me...


« on: May 09, 2007, 07:58:48 AM »

I tried out my newly built GS35b linear amplifier for the first time last night. It works!

I need to move the cathode bias supply wire in the filament supply/biasing circuitry (from the filament transformer secondary center tap to the side of the transformer secondary that connects to the cathode) to get rid of some hum... but other than that, it worked fine driven by my Ranger. Still lots of work left to add the front rack panels, and to integrate it all into a rack with nice meters, lights, etc.. You can see pictures of the major subassemblies/decks here:

http://mysite.verizon.net/sdp2/id20.html

Best regards
Stu
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Stewart ("Stu") Personick. Pictured: (from The New Yorker) "Season's Greetings" looks OK to me. Let's run it by the legal department
Ed/KB1HYS
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« Reply #1 on: May 09, 2007, 08:05:36 AM »

Nice work there. Where did you get the variable caps? are they homebrew?
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73 de Ed/KB1HYS
Happiness is Hot Tubes, Cold 807's, and warm room filling AM Sound.
 "I've spent three quarters of my life trying to figure out how to do a $50 job for $.50, the rest I spent trying to come up with the $0.50" - D. Gingery
WA1GFZ
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« Reply #2 on: May 09, 2007, 08:22:47 AM »

Stu,
I heard your strapping signal last night. I have seen guys make tirfilar input chokes using tubes with cathodes. This way you can connect everything normal. fc
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