[R-390] test equipment question

[David C. Hallam]

That's the reason I got the 8708A phase lock synchronizer to keep my 
606B signal generator on frequency.  Of course, they fill up a big spot 
on the bench!

David
KC2JD/4

Tisha Hayes wrote:
> I know that this is broaching on heresy to mention this;
> 
> I found the URM-25D to be less than helpful when compared to a good 
> signal generator. It is drifty, the impedance matching module is a joke 
> and it is hard to get repeatable results when trying to chase the 
> performance dragon.
> 
> But; if you use a good frequency reference (like the 100 KHz calibrator 
> and that is not waay off and WWV) you can get darned close to being on 
> frequency.
> 
> If you dare to dabble with the compensation screws on the PTO to correct 
> linearity you need a much better frequency counter and signal generator. 
> Of course, gettting used HP/Agilent equipment will cost you more than 
> any one radio would ever sell for. You can find a really decent HP 400 
> series VTVM or a Boonton that would do an excellent job on measuring RF 
> levels for a song-and-a-dance.
> 
> The original maintenance manuals were written around the inherent 
> limitations of the test equipment available at the time (URM-25's). 
> While I try to keep the filaments glowing and avoid transistor/IC based 
> radios in my setup I do use more modern test equipment.
> 
> 
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