2000 volume control, on/off switch

wattsabundant

wattsabundant

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Many years ago a friend gave me a 2000II preamp. It's been on the shelf since then. Recently I checked it out to make sure it functioned and permanently loaned it to my brother. It turns out that the volume control doesn't go completely off. It's not some faint music. It's readily audible in another room. With the pot full counter clock wise the resistance from the wiper to the ground terminal doesn't go to zero. The on off switch is integrated into the pot and it appears that the stop on the switch is preventing the pot from going full off. Has anybody seen this? I'm reluctant to disassemble the pot as I doubt there are replacements.
 
Likely unrelated but something similar is present in both mine and an acquaintence's Hafler DH-101.

I only noticed it when sitting on the floor near a speaker with volume all the way down and an LP was playing. The acquaintance never noticed it at all until I pointed it out and he had his since new. It's a sealed pot in those things, ALPS I believe, and a fellow (John?) at Musical concepts told me by phone it was probably the switches used (implication was cheap) causing crosstalk.
 
wattsabundant said:
Many years ago a friend gave me a 2000II preamp. It's been on the shelf since then. Recently I checked it out to make sure it functioned and permanently loaned it to my brother. It turns out that the volume control doesn't go completely off. It's not some faint music. It's readily audible in another room. With the pot full counter clock wise the resistance from the wiper to the ground terminal doesn't go to zero. The on off switch is integrated into the pot and it appears that the stop on the switch is preventing the pot from going full off. Has anybody seen this? I'm reluctant to disassemble the pot as I doubt there are replacements.
Click to expand...


It could be the cap and/or resistor on the switch also leaking. It's happened a couple times here.
 
62vauxhall said:
Likely unrelated but something similar is present in both mine and an acquaintence's Hafler DH-101.

I only noticed it when sitting on the floor near a speaker with volume all the way down and an LP was playing. The acquaintance never noticed it at all until I pointed it out and he had his since new. It's a sealed pot in those things, ALPS I believe, and a fellow (John?) at Musical concepts told me by phone it was probably the switches used (implication was cheap) causing crosstalk.
Click to expand...

I had one of the early hafler 101's and remember the issue. On the 2000 it is not at all subtle. it is normal, casual listening level.
 
You might check with "oldphaser" about that problem and he possibly could have another control.
 
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