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Title: Hammarlund PA-500 RF Deck Info Post by: Steve W8TOW on May 23, 2016, 01:44:38 PM Acquired this at Dayton this year...wonder if anyone has additional info/experience
with this? Obviously, 100TH's are in the photo, but what else would ya use? HK54's or maybe a pair of Taylor T-55's! Anyone used one of these before? (Oh and I know, this one looks like it was dropped from a C-47 at 5000 ft!) 73 Steve w8tow Title: Re: Hammarlund PA-500 RF Deck Info Post by: Opcom on May 23, 2016, 08:48:48 PM Not I, but you got the main parts there, and only a few really broken things. Hope you will fix it up! Tubes - well, whatever you got! Those types are a bit rare. I confess I would try 572Bs because they are available or even 813s but I have not looked at any specs for the load resistance etc.. leave that to the serious 'old old tube experts'..
Title: Re: Hammarlund PA-500 RF Deck Info Post by: Opcom on May 25, 2016, 01:11:36 AM There is something that looks a lot like it in GE ham news volume 1 No. 1. It uses 813s. Not classic Triodes I realize but a proven project.
Title: Re: Hammarlund PA-500 RF Deck Info Post by: DMOD on May 25, 2016, 06:30:32 PM There is something that looks a lot like it in GE ham news volume 1 No. 1. It uses 813s. Not classic Triodes I realize but a proven project. Page 4: VAN Sickle Radio on Pine Street in St. Louis. Been there many times. Phil - AC0OB |