[Milsurplus] BC-348 modifications

[Ray Fantini]

Some years back I did a you tube video of the most common modifications that were all out of the CQ Surplus conversion handbook, that includes the AC power supply with re-working the filament string, initiation of the S meter and replacement of the audio output transformer for a low impedance transformer. A couple of other things to look at are to be certain you have the resistor in the B- of the HV supply to bias the audio output tube and maybe things like if it’s a Q swapping the 6SK7 in the front end to 6AC7 tubes for lower noise.  Oddly the receiver in that video no longer exist, couple years ago picked up a BC-348-Q that was internally hacked to death but strangely had a perfect front panel. Ended up using the chassis of that radio and built up a version that looks all original on the front, along with the shock mount but has an AC power supply and low impedance audio output for driving regular speakers or headphones.

Original video:

https://www.youtube.com/watch?v=YKRez8euQU4


Ray F/KA3EKH

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