[Premium-Rx] W-J DRO 333A schematics

[Bob Betts]

Paolo:
Yes, and please let me know if you should find one before I do.
I also need the tech data.
I have one that I just got working. No schematic so I used the "head scratch" method and reverse engineered enough to find the problems. These are very stable devices, but somewhat insensitive for my purposes.
I've since added a 20 dB low-noise preamp to the input, that is switchable, for my service bench activities...nice and sensitive now.
 
73,
Bob, N1KPR
 
La Spezia, Italy, Feb. 28, 2012

Hi All:
Here is Paolo from La Spezia, Italy. I'm in a great need of the Service Manual (with schematics) for the Watkins-Johnson 
DRO-333A Frequency Counter, can anybody help me?
TYVM and best 73!
Paolo
Paolo Viappiani 
Via G. B. Valle 7 19124 La Spezia, Italy 
Phone: +139-187-21647
email: pviappiani at tin.it, pviappiani at gmail.com 



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