![]() |
Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
|
Hey all- new to this asylum. I added a new pre amp to my chain a few months back. I was previously using the built in pre amp. I never had any hum with the built in pre amp and I do now. I make my own cables, so tonight I went straight from built in preamp, direct to the amp and bang, no hum.My initial thought is that I had connected the cable shield to the wrong end but cables are as they should be. Both external pre and deck are earthed. I removed the earth from the external pre and the hum got worse.
Any ideas? Typically only hums above 80db.
I'm loathe to buy a new preamp if this happens again.
For reference, the pre is a musical fidelity V90 LPS that get great reviews. I upgraded the power supply to a linear power supply unit as well.
Edits: 01/20/24
This post is made possible by the generous support of people like you and our sponsors:
Topic - Ground hum? - mbrierley 10:13:05 01/20/24 (12)
- First... - Cougar 09:19:41 01/21/24 (0)
- RE: Ground hum? - Rod M 12:55:35 01/20/24 (9)
- Not MM/MC - mbrierley 00:23:52 01/22/24 (2)
- Not even pre-amp - mbrierley 08:15:35 02/19/24 (1)
- RE: Not even pre-amp - mbrierley 05:56:40 02/20/24 (0)
- Not MM/MC - mbrierley 06:09:54 01/21/24 (0)
- RE: Ground hum? - mbrierley 15:19:41 01/20/24 (4)
- When I had a ground loop issue, the phono pre was the cause. - ghost of olddude55 05:15:14 01/21/24 (3)
- Mixed Grounds - Triode_Kingdom 07:19:29 01/21/24 (2)
- So I've read. - ghost of olddude55 07:28:51 01/21/24 (1)
- RE: So I've read. - Triode_Kingdom 08:23:56 01/21/24 (0)
- Might be a ground loop. - ghost of olddude55 11:43:25 01/20/24 (0)