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Old 23rd October 2007, 09:22 PM   #1
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Anyone know anything about this tube? According to the guy I just bought 20 from, they are 6688/E180F equivalent, but I can't find a datasheet to verify this. Anyone tried them?
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Old 23rd October 2007, 09:28 PM   #2
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You find the oddest stuff

Duncan just has pinouts, I'm sure you've found:
http://tdsl.duncanamps.com/tubesearch2.php?TSD=6j9p

My suggestion, breadboard an E180F pre and get it working just right, then drop in the 6J9P and see what happens.

Cheers!
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Old 23rd October 2007, 10:23 PM   #3
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Quote:
Originally posted by Geek
You find the oddest stuff
I'm always on the lookout for cheap stuff, and the 6688 is just about my favorite tube, but at nearly $5 per tube it is just too rich for my blood -- so, for $1 each (ebay), I just couldn't say no.

Yeah, I figured I'd just drop them into a working circuit, but I also thought I should ask about them in case there is some unexpected weirdness.
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Old 23rd October 2007, 10:28 PM   #4
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Old 2nd November 2007, 07:34 PM   #5
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They arrived. They are physically larger than the 6688's, but they test the same in my tester, and dropped into a circuit seem to work just fine.
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