Quote:
Originally Posted by bandersen
There's a family of good all around basic emission testers that share a common design. So similar you can use the same tube setup chart with all of them I've heard.
Triplett 3413
Heathkit TC-1, TC-2 or IT-17
Knight 600
ECIO 625 / 628
I'm sure there are others I'm leaving out. Personally, I used a Triplett 3413 for years and found it to be very reliable.
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Bob,
I agree with everything that you have said, except "they all use the same tube setup chart."
Yes, they are all based on the same Triplett circuit.
I own a Heathkit TC-2 and a Knight 600 and
the tube charts are completely different. Allowing for the different switch numbering, the test scales are different.
My Knight 600 is over 50 years old, and it worked fine until about 5 years ago when the capacitor in the shorts test circuit started leaking enough to make all tubes fail the short test. Replacing that one capacitor solved the problem. The only other thing ever done to this tester was to clean the switches and sockets with a traditional non-Oxy type of contact cleaner. (The Oxy type tends to collect dirt.)
James