[TenTec] [] Running a Century 21 on external 12V power

[Josh Gibbs]

Hi Gary,

Thanks for the offer! I may take you up on that pending the outcome of my
next round of work. I'm going to replace all the cracked capacitors - found
a couple more, one of them on the power board. I've ordered up a bunch of
those green polyester film caps to replace the cracked ones. Probably will
replace the electrolytic caps while I have the boards out... might as well.

I'm going to pull the power board and transformer, then power the radio
with those parts outside the chassis. If the noise goes away then we will
know for sure that it is magnetic coupling.

I did manage to USE the radio this weekend =)  Had a QSO with a guy down in
CA and got a 599 report! It's a great little radio - audio sounds good thru
the speaker. Maybe I ought to just forget the headphones and not worry
about the hum!

73,

-Josh WA7FPV

On Sun, Jun 4, 2017 at 7:44 PM, Dukes HiFi <dukeshifi at comcast.net> wrote:

> OK, this is beginning to sound challenging.
>
> First off, I have a parts cadaver C21 that has all of the power supply
> intact so we have a parts stream.
>
> What if I were to send this to you and you could power your C21 from my
> power supply just to see if there is a hidden design flaw or if there
> really is a bad part in yours (I’d want it back of course).
>
> It might be a good learning experience for both of us!
>
> Gary