[R-390] Smoke got out

Charles Steinmetz csteinmetz at yandex.com
Sun Aug 19 21:09:18 EDT 2018


dog wrote:

> I've replaced the RF section 6.3VAC wiring, including the 10uH choke on
> V205. I never did figure out what happened.

Norman Ryan previously suggested that the original choke shorted to 
ground (chassis), due either to vibration or the insulation on the 
winding wearing off (or both).  Leaving aside purely fantastical and 
magical explanations, that is the only way I can see that the damage you 
observed can be caused to a working radio.  Accordingly, I concur with 
Norman's diagnosis.

Best regards,

Charles


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