[R-390] Electronic digital readout for R390A

[Transmaster]

AD698190

* I was cruising through the National Technical Information Service. This
is a place that if you know exactly what you want and it is not classified
you can purchase it.  If they still have any in stock you can purchase the
TM for a 1939 M5 White Scout Car, I have seen the complete document set for
a F-86 Saber jet fighter in a Government repository Library.  I put
R390A/URR in the search engine and found this.  I don't know if there is
enough info in the publications to build it but the providence makes it a
very interesting, and historical device to build. *

*R-390A/Urr Digital Frequency Readout Unit. (1969) *

 AD698190
 The design and development of the R-390A/URR Digital Frequency Readout
Unit is presented. The history of development including the techniques
considered are discussed. Digital pulse subtraction, which was chosen as
the most economical technique, is descri...
Author: I. Bicevskis W. Emeny
Year: 1969
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Ken de W7ITC

Kenneth A. Crips, W7ITC, NRA Life member. Home of the Chew Crew,  Red
Headed Irish Terrier House Ninjas, Cowboy, and Ladybug  10th degree black
belts in Mouch Fue, Bed Fue, and Con Artist Fue.