[R-1051] 5 mhz standard

[Steve Hobensack]

Jerry,

Be sure the internal temperature of the module is near 85 degree C. I had to drill a small hole and use a lab thermometer. There are 4 resistors that make up a temperature sensing bridge. One resistor is embedded in the oven chassis and there is an adjustment for temperature. There is a 17 volt voltage regulator that drives the heating element. (not 27 volt as stated in the schematic). The oven circuit is troublesome. It has been my experience that if internal temperature is not near 85C, the frequency will not go to 5 mhz using the coarse or fine frequency adjustments.

Steve N8YE

Date: Mon, 19 Jan 2009 15:18:19 -0500
From: jrbarnish at DRPA.ORG
To: r-1051 at mailman.qth.net
Subject: [R-1051] 5 mhz standard








Gentlemen:
 
I just found this 
web page today. I acquired an R1051B
recently and found 
the 5mhz standard is not adustable..It is 
170hz off 
frequency.
 
I would like to get 
it to where it is supposed to be.
Having no idea how 
to fix  it and no schematics as of yet,
does anyone have 
advice?
 
 
Jerry 
WB2CAK
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