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Testing 01A tubes
37silverstreak
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#1

01-13-2014, 09:38 PM
Anybody know if you can test 01a tubes? There is no listing for them for my Precision series 612 tube tester.
I'm going way back on my next project, a 1925 Grebe Synchrophase MU-1, and would like to know what kind of shape the tubes are in. Should be an interesting project. I've never worked on a set this early before. Looks to be very well made and I've read that they are considered to be the best TRF sets ever designed.
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tab10672
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#2

01-13-2014, 10:05 PM
Look for 201 or 301. I have a hickock and a knight that both test them. Try the B.A.M.A. site for obsolete tube manuals for your tester.
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tab10672
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#3

01-13-2014, 10:12 PM
http://oldradios.50webs.com/precision/60...series.pdf This manual has 01a data for your tester
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tab10672
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#4

01-13-2014, 10:14 PM
http://oldradios.50webs.com/precision/ this is the parent site with all info on 612 tester
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