Simon Flint from Australia contacted me today because he noticed that the Sencore Mighty Mite setup data for the diode section in tube EAF801 (which is an RF Pentode with Diode section) did not appear to be testing the diode section properly. He wanted to know if I could investigate. I examined the Telefunken datasheet […]
Sencore Mighty Mite chart data EAF801 Read More »
Here is a letter from the Technical Service department of CBS Hytron tube company, dated June 1954, that discusses a common problem with tube testers. In this letter [ PDF ], which I scanned and restored via Photoshop for better readability, a person from the Max Fischman Co of Pittsburgh wrote to CBS Hytron Co.
CBS Hytron 12BH7 letter about Hickok test Read More »
Meter reading Range Micromhos BCDEF Reset DIRECTIONS: Enter your meter reading (0 – 120) into the “Meter reading” box. Choose your Range Switch position in the drop-down box. Press the “Calc Gm” button and read your micromhos score. Press “Reset” button to clear your entries or to start another calculation. NOTES: calculator works for all
TV-7 micromhos conversion calculator Read More »
Meet the TubeSound TTM-1: Testing of almost all amplifying tubes (triode, tetrode, pentode, beam power) from antique 4-pin (such as a #10, #45, or #50) through 9-pin novar (such as a 7868). Socket configuration — 4-pin, 5-pin, 6-pin, 7-pin medium (aka 1625), 7-pin miniature, octal, loctal, 9-pin-miniature, and 9-pin novar. All tests use exact tube
TubeSound TTM-1 Tube Tester & Matcher Read More »
Copyrighted by Bob Putnak, all rights reserved. “Sometimes output tubes must be selected which will provide a satisfactory balance adjustment. A tube tester usually will indicate whether a pair of tubes have reasonably similar characteristics.” – Robert Middleton, 101 Ways to Use Your Audio Test Equipment, Howard Sams Inc.[1] “Tube matching” is a controversial and
Tube Matching with a Tube Tester Read More »
