Just got through adding the JE labs phono preamp to my JE labs line stage. Line stage is still working fine, but the phono preamp isn't doing so hot. Gain is very very weak and I have hum in the right channel and a buzz in the left. I have included the schem for the phono preamp. Am I correct in interpreting this as using both halfs of one 6sl7 per channel? I would appreciate any hints on what is most likely the cause of the stated symptoms.
Thanks
Vince
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Topic - phono preamp problems - Vinnie 16:46:47 03/04/07 (18)
- I use both triodes of one 6sl7 per channel, nt! - je2a3 08:22:53 03/05/07 (0)
- Re: phono preamp problems - je2a3 08:19:00 03/05/07 (0)
- Have you measured the voltages and do they match that marked on the schematic? nt - Stephen R 02:48:57 03/05/07 (7)
- Re: Have you measured the voltages and do they match that marked on the schematic? nt - Vinnie 03:36:38 03/05/07 (6)
- Re: Have you measured the voltages and do they match that marked on the schematic? nt - Ron Oehlert 14:42:49 03/05/07 (4)
- Re: Have you measured the voltages and do they match that marked on the schematic? nt - Vinnie 15:45:20 03/05/07 (3)
- Break it down. - Stephen R 01:18:45 03/07/07 (2)
- Re: Break it down. - Vinnie 03:04:24 03/07/07 (1)
- Re: Signal tracing - Ron Oehlert 08:08:34 03/07/07 (0)
- I mean the voltages on the anodes (nt) - Stephen R 04:49:56 03/05/07 (0)
- Re: phono preamp problems - Ron Oehlert 22:20:17 03/04/07 (2)
- Re: phono preamp problems - Vinnie 03:32:44 03/05/07 (1)
- Re: phono preamp problems - Ron Oehlert 14:46:37 03/05/07 (0)
- Re: phono preamp problems - Michael Samra 22:02:05 03/04/07 (2)
- Re: phono preamp problems - Vinnie 03:34:31 03/05/07 (1)
- Re: phono preamp problems - Michael Samra 09:58:45 03/05/07 (0)
- Re: phono preamp problems - Chris O 19:31:01 03/04/07 (1)
- Re: phono preamp problems - Vinnie 03:38:30 03/05/07 (0)