Re: Solid State SS replacement of tubes, for older radios, & winding Rf chokes for that: for WWII Rx: BC-348, R-390, R-392, Hammarlund, ...
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I'd like to suggest posting this to the army-radios list. Glad to have it here, but it should be of interest to them also.
Have Fun!
Reg
On Saturday, March 30, 2024 at 10:54:25 AM CDT, gren <hrgerson@...> wrote:
Of possible interest ? Solid state replacements for tubes in some common older Ham? tube Rx :-- A single common FET is used for each tube, in these Rx. ?? MPF102 : JFET VHF Amplifier? ( inexpensive, eBay )-- A small Rf choke is needed for @tube replacement. ?? they can easily be wound on the Rf choke winding machine,? Reg spoke about earlier. ??? ( Or you can buy them from Charles for $1@ ; Charles provides a 1pg instruction sheet? for DIY ) ????? A variety of small Choke Forms can be used,? purchased on eBay. Contact:Charles Smith:? did this to the BC-348, R-390a , BC-348 & R-392? and also done for a Hammarlund. ?? KV4JT ????? charlessmi1@...??
??????? ( very well written,? paper Manuals? @ $7 to $14? per radio ,? describing in detail? all the steps necessary for conversion ):
The? R-392 conversion video is the most interesting:????? Direct Plug-in SS tube replacement modules with little modification to the radio !
???????? ( while the BC-348 & R-390 require small mods done, inside the radios )
See:
BC-348 ( three (3) different video's for the different versions ): ?
R-390a: pat1 & part2:
?? Rf chokes for most SS tube conversions:
? How to wind your own ! R-392 SS Conversion: ? rick
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