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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 20 Aug 2019, 22:56

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 Post subject: Collins S Line AM Mod
PostPosted: 15 Aug 2019, 18:06 

Joined: 30 Aug 2017, 09:49
Posts: 38
Has anyone done the mod to use you Collins S Line Transmitter on Am. Well I am as old as my 32S-1 transmitter that I have had for 40+ years and am the second owner. I also have the 75S-1 receiver as well. They are the way they were from day one. Only new electrolytic caps and 6146's over the years. I use mainly 40 meters.I have a 20 watt transmitter that I built driving a 813 linear that I also made. There is a mod that uses 2 .01 caps a 5k lot and a switch. For Am. No holes have to be drilled and every thing can be mounted under the top cover. What I am asking has anyone done this. The reason is my 813 linear relay heats up my shack. To the point I can not use it during the day. And with the solar minimum 20 watts will not cut it. With my Collins I get 125 watts. I have talked all the way to Russia and New Zealand with my 1/4 40 meter vertical. I have talked to George and Canada with 20 watts. But that is only when the band is open. Which is few and far between now. 73's

Alpha Wolf

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