...aerospace for me (Grumman A-6/F-14/E2/C2 and all variants...then mostly in satellite/space biz). My EE's shiver at antique car single-ended wiring using the chassis as the return path...no wonder the radios have so much EMI noise.
Presumably youve done a refurb of the electrical guts (replacing paper and electrolytic capacitors, vibrator, etc).
Have you read the packard advisories about suppressing noise with distributor condensers and spark plug isolation? The attached file is for a Packard postwar radio noise but it is no different than the remedy for pre-war radios.
Attach file:
PA-439661_PA-439665_Radio.pdf Size: 1,270.90 KB; Hits: 97
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=268624