[R-390] Servicing Advice on Signal Generator URM-25D

[Roy Morgan]

At 10:19 PM 1/8/2005, pdulaff at earthlink.net wrote:
>...L117 has failed on my signal generator. ...what else in the unit should 
>I change as a preventative maintenance item ?

All the resistors and capacitors in the Twin Tee audio oscillator circuit.

All other paper capacitors.

You really should have the Dallas Lankford 18-page document:

>URM-25D Overhaul Notes by Dallas Lankford 11-88, revised. 1-94, with copy 
>of HSN Supplement from Issue 41 about the "Terminal Board". (The Overhaul 
>Notes themselves did not appear in HSN, only a notice that they were 
>available separately.. There are about 18 pages if I remember 
>correctly.  Dallas has not made a similar set of notes for the -F model, 
>unfortunately.)


You can get a copy from the editors of Hollow State News for a modest sum. 
It will be the best modest sum you have ever spent if you intend to keep 
your URM-25D running indefinitely.

Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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