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
