[Heath] IT-17 Tube Tester question

[OTR]

Hi Terry,

 

I have both a working IT-17 and a NOS 6SN7.  I ran a test for you, and found that the 6SN7 tests perfectly on this tester (with a reading of 90 on the meter for both tests) using the recommended tube type of 2.

 

Regards,

 

Wayne, VE3NKS

  _____  

From: Terry Perdue <k8tp at comcast.net>
To: heath at puck.nether.net 
Sent: Friday, February 19, 2016 5:07 PM
Subject: [Heath] IT-17 Tube Tester question


Does anyone recall having a problem testing 6SN7 tubes? I've tested a number of them, and the meter always pegs violently using the listed settings. I've noticed that changing the 'Type' setting to 1 (the chart says to use 2), gives an in-scale reading. But I have a later loose-leaf listing that was compiled after the roll-chart was produced, listing many new tubes that aren't on the roll, and it still shows type 2 for this tube.

Any comments? Other types found that don't test properly using the listed settings? Or maybe no one uses tube gear anymore...
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