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I just tubed up a breadboard for test, and was going to use the JJ E34Ls instead of =C= beauties. The pins on these are the right size (I miced them and reported back weeks ago), but OMG, they have no taper on the ends at all; in fact, they are beyond square, having a slight 'mushroom' of solder on the cutoff burr.They are impossible to feed into the socket keepers; there's no way to get all 8 pins perfectly lined up so that they are exactly centered in the little clampies (which move around a bit as well). I finally gave up, and used one of the quads of SEDs. I hope I didn't do something stupid with the B+.
Are you able to talk to these guys? Will they listen to you? I mean, we know that they aren't trying to make defective unusable tubes. Why do they keep doing this dumb stuff? They got to know they're digging themselves a hole.
Auwe,
Follow Ups:
Do the JJ7591s have the same problem? I was going to by another set for my 340B. The first set of JJ's seemed fine over a year ago.
Right now I would not purchase ANY JJ octal tube unless the seller can verify the tube pins are proper sized, about .092".
know a guy who has a couple cases of bulk ones but don't know the story on them.
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Boo!
Post me privately. It's iffy.
Poinz
JJ kind of pissed me off even when I called them because they tried playing dumb like they werent aware of the problem..When you can build a tube that sounds that good and really take your reputation afar and then make some mechanical blunder that can spoil it all,that really makes me wonder if they are targeting a selected crowd to use their product.
Poinz, I wish I knew. Maybe they are underfinanced, maybe the New Sensor companies are beating them up. Maybe they've had a brain drain, and lost some critical skills. Maybe they are getting bad advice from some of their large distributors.Mike Samra who also posts here sent JJ a note on his and my behalf. We never got any meaningful reply. The only word we ever got back from them was a slam against the distributor. Like the distributor MADE the tubes!
But the day of reckoning has to be near - you are right, you can't go on building junk forever regardless of how it sounds (if you can get it to work).
BTW, just for contrast - I tested 100 Tung-Sol reissue 12AX7s today. Almost zero defects - one marginal tube... And I test for noise and microphonics too.
Jim - I'm curious how you test for noise and microphonics. I know you do, because every tube I've bought from you has been fine. With all the different kinds of tubes you sell, you can't possibly have audio equipment that uses all of them. Can you?
Hi Mark,No, I can't! So I modified a commercial tester to allow me to test for noise and microphonics.
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