[Hammarlund] HQ-170 Audio

[rbethman]

Well, I've just been riding along and reading.

I *DO* have an HQ-170A, AND have the original manual that it came with.

I haven't anything to contribute, so I've stayed quiet.

Sometimes its either MORE interesting to sit back and watch/listen!

Bob - N0DGN

On 2/21/2011 2:04 PM, Carl wrote:
> I mentioned replacing Z-2 yesterday which appears to have floated above
> anyones vision.
>
> Now I wonder how many commentors actually have a HQ-170 or have looked at
> the schematic before posting?
>
> That little circuit is known as a Couplate when its a Centralab and other
> companies have their own pet names. To any tech worth his price its known as
> trouble and is automatically replaced. Now Ive seen several 170's using
> discrete components so cant say if Hammarlund changed in production, later
> in their Service Dept or it was done by someone else.
>
> The fix of course is to use discrete components and the values are on the
> schematic.
>
> If the noise is still there then at least one trouble spot has ben
> eliminated.
>
> Carl
> KM1H