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In Reply to: RE: Is there is test data for a 6B4G on an Eico 666 tester? posted by Michael Samra on March 01, 2014 at 16:57:18
I tested several 6B4Gs on my Eico 666 using data from Coletronics chart and they all tested short on the same pin, leading me to believe the data is wrong; wouldn't be the first time. They can't all be short. Meanwhile, the tubes sit in unresolved status.
Pete
Follow Ups:
Direct heated tubes will test shorted for the heater/filament.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
The test settings should account for that. By chance I found some completely different settings that seem to be correct, 'obsolete tube' data for Eico 666. Of 3 6B4's -- 2 tubes good, one a little low.6.3. 7 75, 12315 11111, 4 1, 3-5, test on 3.
Edits: 03/03/14
Thankfully it isn't my tester.
Honest amplification is better than excessive 2nd order distortion anytime.
I'm glad you worked it out.
On my Triplett 3444 all direct heated tube show a short, heater to cathode, because they're one in the same.
But all testers are different.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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