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Hello everyone!
I have the confluence of a few problems and was wondering if anyone had thoughts.
I'm lucky enough to have a turntable with 2 tonearms mounted. Ever since a move about 18 months ago, I've only listened to one of them.
The problems:
#1: I was using my "backup" tonearm/cartridge, and I only got sound from one channel - clear sound.
I switched the signal wires to the opposite channel but did NOT switch the ground. I got sound from BOTH channels... but accompanied with a low-level (60Hz?) hum.
With signal wires connected but grounds disconnected - no sound at all from either channel
With signal wires again connected to the matching channel's ground wire: clear sound in one channel only.
I was unable to get rid of the hum.
#2 The reason I'm using my backup arm/cartridge:
I noticed distortion on a recording the other day only in certain parts of a record (was actually both sides of a 2-record set; the first record was fine). I obtained another copy, and the distortion was there, but only on one of the 2 sides. Got a 3rd copy and... a similar thing. I thought it might be an issue with the entire run. It only happened with a particularly quiet/clear minimal recording of human voices.
Noticed the same distortion issue with another new-to-me record and it then made me test further.
Yep... seemed to be a problem with the cartridge (4yo Lyra). I think the suspension may have failed. The cantilever seems like it is tilted to one side in a way I don't recall it previously doing.
No accidents were had with it-at least that I'm aware of. Oh well... need to figure out whether or not to rebuild and how to go about it.
#3 Last thing..... I do sometimes stream music from my computer to my system. Seems like the backup to the backup. I got a new computer a month ago and....... nothing. For some reason my ADC (an old Apogee Duet) appears to be receiving a signal but nothing comes out when connected to my amp as I've always done before.
Oh well!
Rare that 3 failures would happen in short order, but there you go.
Anyone have any thoughts, esp on #1?
Follow Ups:
Fixed problem #3 with the new computer + old A/DC....phew.
If only the tonearm wiring problem (#1) were a simple fix! Perhaps someone has an idea for something (obvious) I'm missing.....
Solved problem #2......
Not sure how it happened, but my tracking force was low. Fixing that immediately solved the issue. I haven't adjusted the table since I moved over a year ago.
I'm more pleased that it was NOT an issue requiring a rebuild than I am disappointed in not being able to figure out how this could have happened.
As for problem #1....
Everything points to an issue with tonearm wiring. The single, clear channel jumps to the other side when I swap the L-R signal and ground connections at the head shell.
I cannot figure out how I get sound from BOTH channels (plus the hum) if I swap ONLY the L-R signal connections at the head shell.
This is a Dynavector mono cartridge, for reference.
Thanks for any thoughts.
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