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Hammarlund PA-500 RF Deck Info




 
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Author Topic: Hammarlund PA-500 RF Deck Info  (Read 5275 times)
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Steve W8TOW
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« 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


* 20160522_092453.jpg (2428.25 KB, 3264x1836 - viewed 283 times.)

* 20160522_095246.jpg (1724.47 KB, 3264x1836 - viewed 348 times.)
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Always buiilding & fixing stuff. Current station is a "Old Buzzard" KW, running a pair of Taylor T-200's modulated by Taylor 203Z's; Johnson 500 / SX-101A; Globe King 400B / BC-1004; and Finally, BC-610 with SX28  CU 160m morn & 75m wkends.
73  W8TOW
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Patrick J. / KD5OEI
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« Reply #1 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'..
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Patrick J. / KD5OEI
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« Reply #2 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.

* ge_ham_news_vol_01.pdf (2186.14 KB - downloaded 132 times.)
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Radio Candelstein - Flagship Station of the NRK Radio Network.
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AC0OB - A Place where Thermionic Emitters Rule!
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« Reply #3 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
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