How did you like the process and the radio. I am troubleshooting a Mk12D
problem now where the radio does not modulate, but has a carrier. It
finally works, after it warms up?. It never failed on the shop bench,
even with spray cooling and placing it in a refrigerator. I am going to
swap the two Narco Mk12Ds and see if the problem follow the radio or is
somewhere else.

endre wrote:

Thanks. Same basic radio. Had a Narco 12D upgraded by narco to 12D+.
Same weight same location.

(C Kingsbury) wrote in message . com...
(endre) wrote in message . com...
I am reading the FARs and am having a hard time figure out whether I
can slide out my old radios and have them upgraded and put them back
in. Slide in and out only no wiring or changing the shelf itself. Or
do I need A&P inspection?

Weight & Balance is your main issue. AFAICT you're A-OK if you're
replacing like with like, but if you're making real changes that would
affect CoG, you at least need to get a new W&B signed off.

-cwk.