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retroradioman
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Post subject: Radiola III WD-11 to UX-199 conversion.  Posted: Dec Tue 27, 2011 2:11 am |
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Joined: Dec Mon 26, 2011 9:43 pm
Posts: 3
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I am restoring a Radiola III and would like to convert to UX-199 tubes. I understand RCA issued Service Bulletin #6 (Dec. 11, 1925) showing how to convert the Radiolas III and III-A to UX199 and UX120 tubes. Does any one where I can find a copy of the bulletin or tell me how to convert to the UX-199? I plan to make an adapter to plug the tube in but the voltage and current requirements of the WD-II are; 1.1V and .25A, the UX-99 are; 3.3V and .06A. How do I compensate for the difference?
Ed
Last edited by retroradioman on Dec Tue 27, 2011 9:44 pm, edited 1 time in total.
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Bugman
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Post subject: Re: Radiola III WD-11 to UX-199 conversion. Posted: Dec Tue 27, 2011 2:54 am |
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Joined: Mar Sat 14, 2009 4:56 pm
Posts: 4812
Location: VA 22602
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You will either have to change tube sockets or make tube adapters to change the radio from WD-11's to 199's. A tube manual will supply you with all the information you need to make the change. I have built both adapters to allow me to test WD-11's in my Hickok and adapters to use another 1V tube in place of a WD-11 in a Radiola III.
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I'm not a hoarder, I'm a caretaker of scarce commodities
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Tony Wells
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Post subject: Re: Radiola III WD-11 to UX-199 conversion. Posted: Dec Tue 27, 2011 7:03 am |
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Joined: Oct Sun 18, 2009 4:38 am
Posts: 3438
Location: Tyler, TX 75707
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I'm right 97% of the time. Who cares about the other 4%!
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