[Drake] Re: Drake TR4CW

Bonddaleena at aol.com Bonddaleena at aol.com
Thu Nov 10 19:18:58 EST 2005


 
In a message dated 11/10/2005 7:02:57 PM Eastern Standard Time,  
rkeller at ij.net writes:

Dave,
Is this the same in the TR4C? In my TR4C at least, that  R13
is a 33K in the grid to cathode of V3A mixer. Would that be
the one  to which you refer?
73, Dick KF4NS
St. Petersburg, FL 33714 USA
Keep  the glow!

----- Original Message ----- Message: 1
Date: Wed, 9 Nov  2005 06:47:27 EST
From: Wa1cvn at aol.com
Subject: Re: [Drake] TR4CW
To:  amfone at sbcglobal.net, drake at mailman.qth.net
Message-ID:  <258.905bfe.30a33bcf at aol.com>
Content-Type: text/plain;  charset="US-ASCII"

There is a swamping resistor R-13 located near the  relay
that has a tendency
to change value. It may be the cause of your  problem.  This
resistor adjusts
the current reading to the meter  and is factory selected.  I
have replaced a
couple of them for  lower or erratic meter readings.

Hope this  helps,
Dave


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I believe, this is my problem area. R13 is 'selected in production'. In my  
case, there was 2  large, parallel 5.1 ohm power resistors... In addition,  one 
leg was shorted to an adjacent terminal. However, removing these resistors,  
and attemping to measure a vottage there produced zero. Nearby, there is a 
diode  with only one end connected!
 
This was a 'parts' radio I got for cheap and I've brought it back to near  
100%, with the exception of the s-meter, but I'll get that!
 
 
ron
 
N4UE
Any APPROXIMATE value for R13??


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