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Saw this random piece of equipment at a collectible/junk shop nearby. Since I run a couple of vintage tube audio components, and have a box full of various NOS tubes I have yet to use in them, a tube tester at the right price might be a useful toy. planning on taking a few of my tubes to this shop to try out the machine and see if it's operating OK. But don't know anything about relative quality of this model vs. others.
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Emission testers such as this one may be less valuable than transconductance testers in the sense that they bring less on e-bay, but they are useful in their own right. Depends what you want to do with it whether it is good for you. If all you want to do is get a quick check on whether a tube has a reasonable chance of working in a circuit, an emission tester will do that. Don't know about this one in particular, but many of them will test for open elements and for shorts. The real test is in the application anyway and no tester can simulate every application.Upside: quick and easy test, cheap tester. Downside: can't match output tubes, can't get a "reading" to advertise when selling tubes.
I say go for it if the price is right and it works well and has its manual. You didn't mention price. $50 or less would be a bargain. Good luck!
they are asking $75 but I'm sure that's negotiable.
It may marginally be worth that if it's perfect, but I bet they aren't going to money-back-guarantee it! A lot of these antique places get kind of carried away on their pricing. If you have patience, let it sit there for a while and then offer 'em $20 for that old piece of junk! Best of luck!
Manual is online at Boat Anchor Manual Archive. Good tester for antique radios and TVs cuz it takes nearly every tube base ever made (at least if it's the "B" version). But not a "thorough" test - just cathode emission and shorts.
The Knight KG600 is an emission tester. It enables you to find out whether the tube conducts to the cathode of the tube. The more valuable and useful type of tester is the mutual conductance tester. Those kinds of testers measure at the plate of the tube and can give you an indication of how well the tube is able to amplify a signal.
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