[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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