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#1039713 - 01/30/06 07:54 PM Amp problem, can I fix it?
filete Offline
Member

Registered: 07/12/03
Posts: 8
Hi there!

I am about to move my studio to another place, and I found
an old power amp (Alesis R-100) that it has this problem, I wonder
if I can fix it:

The right volume knob, when you turn all the way down, it continues
to let sound out, if I turn to other position he gets a lot of variations
on the volume level.
As you can see, this makes impossible to stay on a specific volume
level exactly as the left channel.

Is this a easy thing to solve?
And can I fix it or should I get technician help?

This amp has been for several years (2-3), in the original
cardbox, but with no use.
If this problem becomes expensive to fix it, I just might give it
away and get another one!

Any help or repair link would be great!

Thanks!

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#1039714 - 01/30/06 08:04 PM Re: Amp problem, can I fix it?
Bill@Welcome Home Studios Offline
MP Hall of Fame Member

Registered: 08/23/03
Posts: 9613
One of the most useful things that a studio can have is a stepped attenuating system for monitor level control. This insures repeatability. Were I in your shoes, I'd probably run that particular amp flat out, and go to GoldPoint or DACT and get an attenuator. I'd probably even calibrate it to RP200 as per Bob Katz's excellent instructions in his mastering book.

Bill
_________________________
"I believe that entertainment can aspire to be art, and can become art, but if you set out to make art you're an idiot."

Steve Martin

Show business: we're all here because we're not all there.


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#1039715 - 01/30/06 08:13 PM Re: Amp problem, can I fix it?
filete Offline
Member

Registered: 07/12/03
Posts: 8
Sorry, but does not look the amp have a potentiometer problem?

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#1039716 - 01/30/06 08:30 PM Re: Amp problem, can I fix it?
Bill@Welcome Home Studios Offline
MP Hall of Fame Member

Registered: 08/23/03
Posts: 9613
Quote:
Originally posted by filete:
Sorry, but does not look the amp have a potentiometer problem?
Sure. And likely (but not definitely)it is a dirty or failing pot. But you knew that. Open the unit, and see if it can be easily replaced. If not, take it to a repair shop and let them do it. I don't know what bench time costs in your area, and I don't know how hard it would be to change the pot in this amp.... but it still shouldn't take more than 2 hours of bench time. Surely the amp is worth more than that?

Bill
_________________________
"I believe that entertainment can aspire to be art, and can become art, but if you set out to make art you're an idiot."

Steve Martin

Show business: we're all here because we're not all there.


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#1039717 - 01/30/06 08:45 PM Re: Amp problem, can I fix it?
filete Offline
Member

Registered: 07/12/03
Posts: 8
I am gonna open and try to clean it with a
contact cleaner.
Is this a correct procedure?
If that does not work, can you easy replace it,
or it involves soldering?

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#1039718 - 01/30/06 08:50 PM Re: Amp problem, can I fix it?
Bill@Welcome Home Studios Offline
MP Hall of Fame Member

Registered: 08/23/03
Posts: 9613
I'd surely try contact cleaner first. Yes, to replace it would require solder. The problem with some of the inexpensive gear is that it is not really easy for non-techs to replace parts, like it used to be. Sometimes it is very much worth paying someone else to do it for you.

Bill
_________________________
"I believe that entertainment can aspire to be art, and can become art, but if you set out to make art you're an idiot."

Steve Martin

Show business: we're all here because we're not all there.


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#1039719 - 01/30/06 08:56 PM Re: Amp problem, can I fix it?
filete Offline
Member

Registered: 07/12/03
Posts: 8
Quote:
Originally posted by Bill@Welcome Home Studios:
I'd surely try contact cleaner first. Yes, to replace it would require solder. The problem with some of the inexpensive gear is that it is not really easy for non-techs to replace parts, like it used to be. Sometimes it is very much worth paying someone else to do it for you.

Bill
Yes, I think that too.
Ok, thanks.
By the way, how did you manage to use your
own avatar?

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#1039720 - 01/30/06 11:02 PM Re: Amp problem, can I fix it?
Bill@Welcome Home Studios Offline
MP Hall of Fame Member

Registered: 08/23/03
Posts: 9613
If you look in your profile, you'll see that option.

Bill
_________________________
"I believe that entertainment can aspire to be art, and can become art, but if you set out to make art you're an idiot."

Steve Martin

Show business: we're all here because we're not all there.


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