Thanks for the tip, this was exactly the problem as I was using a small
KLH "bookshelf" speaker for my 897D. Once I switched to a Motorola-type
communications speaker, the hum went away.
Good call, thanks again.
On 8/29/2011 7:15 AM, Robert Scott wrote:
> A while back I was experimenting with different external speakers, and
> while trying a hi-fi type speaker with a wide frequency response, I
> also noticed an ac hum while on 2m. I've had the radio about 7 years
> and hadn't noticed it before, so I assumed it had alway been there but
> didn't show up as long as I used a communications type speaker with
> the audio below say 100hz rolled off. Just my thoughts.
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