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CBS Hytron 12BH7 letter about Hickok test. Posted in Tube Testers. On August 30th, 2014. 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. asking them why so many CBS Hytron 12BH7 tubes were testing weak on their Hickok 533A tube tester. Factory.CONTENT
This website tubesound.com has the following on the web site, "CBS Hytron 12BH7 letter about Hickok test." We viewed that the website also said " On August 30th, 2014." It also said " 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. asking them why so many CBS Hytron 12BH7 tubes were testing weak on their Hickok 533A tube tester."