Suddenly 6DJ8's don't work in my system 6922's are OK

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Hi, Wondering if you could help me figure this one out. I own an Audible Illusions M3a preamp and an AR PH3 Phono stage. Each of these units runs on 6922's.

I've rolled tubes for years in both these units, 6DJ8's, 6922's, 7308's. No problems at all. Tonight I decided to listen to Amprex 6DJ8's in the PH3. Removed Telefunken 6922s, put in the Amprex 6DJ8s, turned her on - warmed up - "Bzzzz", severe distortion restricted volume. Scared the hell out of me, I had just finished cleaning my stylus. But all went OK when I put the Telefunkin 6922's back in. I moved to my AI M3A. Changed the Siemens 6922s to Siements 6DJ8's. Same thing!!! Once again all is OK with the 6922's.

In the spirit of disclosure I should add one point. All week I have been rolling 6922's and 6DJ8's in the PH3's #3 position - think that's called the Cathode Follower. No problems there. This is the first time I put them in the #1 and #2 positions in a while. Perhaps tomorrow I'll try the 6DJ8's in the #3 position but that won't really tell us anything.

I'm stumpted. The 6922's I'm using were stored beside the 6DJ8's. I've used 6DJ8s countless times in each unit over the years. If you were me, where would you look to trouble shoot this one? I've never seen anything like it, have you?

Could this have anything to do with the local power grid at 3am? Ah I'm shooting in the dark. Love to hear what you think, this is wierd.

Thanks in advance for your thoughts. I appreciate it. John

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Topic - Suddenly 6DJ8's don't work in my system 6922's are OK - jk 00:18:21 01/27/16 (9)

You Were Right!!! - jk 00:14:30 01/30/16 (1)

RE: You Were Right!!! - becketma@yahoo.com 15:25:31 02/03/16 (0)

Ditto. Clean sockets & pins thoroughly. Retention sockets. (nt) - Jonesy 08:15:54 01/27/16 (0)

Sounds like a socket issue - Chip647 04:53:47 01/27/16 (5)

RE: Sounds like a socket issue - Jim McShane 08:11:52 01/27/16 (4)

Jim's Info Post on Tubes... Excellent! - Jonesy 10:09:13 01/27/16 (3)

RE: Jim's Info Post on Tubes... Excellent! - Mendel 13:16:25 01/28/16 (2)

Dental Picks! - Jonesy 17:20:27 01/28/16 (1)

RE: Dental Picks! - Mendel 17:33:02 01/28/16 (0)

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