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Re: TDA2822 ill treatment test! Photo of blown TDA


Vince Vielhaber
 

Didn't have it on long enough to transmit. Turned on, saw the number on the DVM, turned off and said some unrepeatable things.

Vince.

On 03/05/2018 11:56 AM, Jerry Gaffke via Groups.Io wrote:
Good thing you didn't transmit, that would have given you something.
Something like smoke and flames where Q13 and R141 used to be on your
Bitx40.
Just in case others decide to replicate your experiment.

Not a good idea to run these rigs with much more than 12v.
(Finals are fine to 24v if you give them an adequate heatsink.)

Jerry

On Mon, Mar 5, 2018 at 08:34 am, Vince Vielhaber wrote:

B40, nothing. I accidently gave mine 20+ when a regulator shorted in
the worst possibly way. No damage done. With that audio chip I'll be
using a much better regulator! Although I may replace it before I
power it up. Then I can run a couple of experiments on the original.

--
Michigan VHF Corp.

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