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In Reply to: RE: Tube ID please... posted by popsy on July 06, 2016 at 16:33:09
Since those don't have the diamond on the bottom between the pins,those are no doubt Ei ,Pre-war Smooth Plate Siemens and Philips Labels - Nish Yugoslavia. Now, if the number is worn off and you can't tell if it's a 12AU7 or a 12AX7,putting a 12AX7 in a tube tester set for a 12AU7 will peg the scale or read almost full scale.The second tube you have is an in 6HU6 tuning eye tube most likely.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 07/06/16Follow Ups:
...6HU6 display is a dual ended teal colored bar where the gap length indicates signal strength. The pictured tube displays a green "curtain" shape that closes to indicate signal strength. Most likely a 6DA5.
i have 2 if you need some :)
I've got only one tuner that uses a 6DA5 and 5 or 6 NOS replacements so I'm good for my lifetime....kinda like Zenith TO collectors and 1L6s. But thanks anyways.
I just changed a 6HU6 in an MR67 tuner 3 weeks ago and you are right.I just had an 6HU6 on my mind because I just used my last one in that MR-67 and now I need more.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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