[Milsurplus] BC-348 Conversions

[Mike Hanz]

w7qho wrote:

> So, having said the above I would like to offer up a few BC-348 
> improvements I've found to be worthwhile.  First off, the dynamotors 
> have a finite operating life and are hard to find so install an AC 
> supply if the radio is to be used regularly. 


Dennis suggested a great list of improvements.  He already knows this 
full well, but I would recommend avoiding putting a thermionic rectifier 
tube in the power supply if you are going to install it internally.  
(External supplies are preferable, frankly.)  The heat balance of the 
BC-224/348 was carefully designed by RCA to provide as stable an 
environment as it could possibly be, but introduction of additional heat 
sources like a rectifier filament within the unvented cabinet drove many 
hams to add cooling holes because of the induced frequency drift.  Other 
than that caution, everything else Dennis recommended is golden.

73,
Mike  KC4TOS