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

[Dukes HiFi]

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


> On Jun 3, 2017, at 7:32 PM, Josh Gibbs <gibbsjj at gmail.com> wrote:
> 
> My shielding attempts made no difference. I also unbolted the transformer
> so I could move it around slightly (as much as the leads would allow). That
> had no effect.
> 
> I think my next step will be to remove the transformer + power board from
> the chassis and run it on the bench. That should stop the noise if its
> magnetic. Might replace the bridge rectifier while I have the power board
> out.... its a $2 part (VJ048 - NTE53000 equivalent).
> 
> -Josh WA7FPV
> 
> On Sat, Jun 3, 2017 at 2:53 PM, Gary F <dukeshifi at comcast.net> wrote:
> 
>> If those are cracked, I guess I wold replace them.
>> 
>> They likely will not fix the hum but should not be left if cracked.
>> 
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