[Hammarlund] HQ-170 Audio

[Carl]

Its in the 170A also, same comments apply.

Ill be quiet for awhile and will be digging into a customers Alpha 76PA 
repair job that ate its bandswitch, fried the 160M toroid and probably more. 
That should put me into a foul mood soon (-;

Carl


----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: <hammarlund at mailman.qth.net>
Sent: Monday, February 21, 2011 2:13 PM
Subject: Re: [Hammarlund] HQ-170 Audio


> 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
>
> ______________________________________________________________
> Hammarlund mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hammarlund
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hammarlund at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html