[Collins] 75A-2 question

[jeremy-ca]

Has it ever been recapped and out of tolerance resistors replaced?
Then replace weak tubes and do an alignment.

Once the receiver is brought back to factory specs those problems will most 
likely go away. Or at least give you a valid place to start measuring the 
AGC action and make changes if necessary.

At one point I thought that my 75A4's were above the ills that only the 
"little radios" (A take off on Leona Hemsley) suffered. Once I went thru 
them I was amazed at the improvement.

Carl
KM1H



----- Original Message ----- 
From: <telegrapher at att.net>
To: <Collins at mailman.qth.net>
Sent: Thursday, August 23, 2007 2:18 PM
Subject: [Collins] 75A-2 question


>I notice that when i turn the RF gain control up on my A-2 that the AGC 
>attack time drops way down.  I normally run it to where the S-meter just 
>moves on audio which is more than adequate.  However if i'm listening to a 
>weak station  and have to turn the RF gain up higher the meter is very 
>sensitive and jumps around a lot.  It also seems to distort the Audio a 
>bit.  I guess the main thing i'm wondering about is should it affect the 
>AGC reaction time.  Higher gain setting, faster attack time and VS. Doesn't 
>seem right to me but then what do i know.
>
> Any thoughts on this.
>
> Larry
> W0OGH
>
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