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Problem with preamp..need direction.

I have a cheap audcom 2 tube/remote pre w/auricaps.
Im getting music out of the L channel with the volume all the way down.It does it with the tuner,sacd player and phono.The R channel is quiet.
If there is no source of music (turn the tuner off) I get a hum from the L channel.
I have switched the tubes around,installed different tubes.No fix.

I switched the speaker cables in back of the amp and then the problem goes to the R channel.
I switched the I.C.'s in back of the amp....then the preamp and the R channel stays affected.
I guess this narrows it down to the preamp.
My question is "NOW WHAT"! I have soldering skills but thats where my tech.ability/knowledge ends.
I'd like to be able to do a DIY fix if possible.
Thanks for any help.
david99
7 responses Add your response
unsound
7,329 posts
 
David, its only a guess, but, I think Marakanetz is right on.
david99 OP
1,467 posts
 
I contacted the guy (Bob) I bought it from.
He is a good tech. and installed the auricaps.
I had 1 minor problem in the past and he took care of it free including shipping back to me.
I contacted him and he said it may be a pot or internal adjustment for voltage.There are 2 adjustment pots inside.I turned the adjustment screws but this did no good.
If I cant figure this out,I'll send it back to him.
He has offered (again) to take care of me even though I bought this pre off him almost a year ago.
Its sellers like him that make buying on AudiogoN a great pleasure...thank you Bob!!!
Post removed 
marakanetz's avatar
marakanetz
5,473 posts
 
david,
try to replace volume pot for the alps japanese attenuator. it's affordable and will most-likely get rid of your problem along with valuable upgrade of your preamp.
david99 OP
1,467 posts
 
Viridian-The hum is audible anywhere in my room.
It diminishes w/music but is still there,but very low.Its the same with tuner/cd/phono.
It hums the loudest when no signal is being fed.
With the volume down all the way I can hear the music from the 1 channel throughout my house.
Makes good back ground music,but....would you really live with this!

Marakenetz-Its a volume pot.

Now here's my tech.knowledge at its best.Could it be a bad cap? Power supply?
I need some advice guys/Elizabeth.
marakanetz's avatar
marakanetz
5,473 posts
 
Is it volume pot or attenuator?
Typical problem for volume pots indeed.
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