[R-390] RE: Power transformer failure

[Tim Shoppa]

N8YE writes:
>  I have said this before, and I think it is worth reminding again.
>  have had two power transformer failures. The fix is not too
> difficult, so don't trash the transformer until you check out the
> little hi-tension feed-through ceramic tubes in the transformer.
> The failure was just inside transformer in the tar potting at the
> entrance to the tube.

Last time I checked, 390A transformers (in fact entire power supply
modules) were readily available at Fair Radio. I got several not for
use in 390A's but just for use as general purpose B+/filament supplies
for experimenting because the price was so attractive - way less
than new transformers of similar ratings.

Of course I had to provide capacitor/chokes for filtering...

I compare what Fair Radio charges for a whole power supply module
and compare it to what a single much more minor 390A part otherwise goes
for on E-bay - Wow!

Tim N3QE