[Heathkit] Heathkit TT-1 Tube Tester Problem

[B Riches]

 Hi Harry,
I will test a 12by7 on mine tomorrow.73,Bill, WA2DVU
    On Wednesday, February 19, 2020, 03:57:53 PM EST, Harry Williams <willisw200 at msn.com> wrote:  
 
 Hi....I am having trouble testing a 12BY7 on my TT-1 tube checker. I have tried testing 5 or 6 of them and when I pull the gm test switch the meter slams the right hand peg on all the 12BY7's. Other tubes seem to test just fine. I have gone through all of the operational checks and calibration procedures and everything looks ok. So I am wondering if the settings in the tube list are correct. I have the latest supplement (1978) and I do not see any updates in the settings for that tube. So I am wondering if someone else that has a TT-1 that has tested a 12BY7 can verify that the settings for that tube are correct.

Thanks and 73's
Harry
W0LS
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