Home electron Tube Data sheets Back
Frank's Electron tube Pages  
Frank's electron Tube Data sheets Precision 660  

The Precision 660 tube tester with my DIY socket adapter
Circuit diagram
Circuit diagram tubes part only
G140 adapter
Coletronics Flyer
Test Data :
Tube-list in excel (updated 2023-11-26)
H2B Rolchart
TRC HB
TRC 63-10
TRC 65-08-15
TRC 65-10-01
TRC 65-10-25
TRC 66-04-01
TRC 66-06-25
TRC 67-08-09
TRC 68-10-01
TRC 69-04-01
TRC 70-02-01
TRC 70-06-01
TRC 70-11-01
TRC 71-02-15
TRC 71-06-01
TRC 76-01-01
Form 660 TDC (9-59) transistor test data