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zx450 crossover potentiometer part #
Posted: Thu Sep 27, 2007 10:49 am
by m22_jack
I've searched with absolutely no luck.
Every winter my zx450 starts _groaning_ until it gets warmed up. After speaking to a tech several years ago, I discovered it's a common problem when the crossover pots are fouled. Since it was warming up at the time, I sort of let the issue rest.
That was several moves and several computers ago and the part number has long since been lost.
The part is marked B10K, which is a pretty generic marking for a 10k audio potentiometer. However, that doesn't give much information regarding power rating, etc.
If anyone knows the part #, I'd sure appreciate the information. Thanks in advance.
Matt
Re: zx450 crossover potentiometer part #
Posted: Thu Oct 04, 2007 12:02 pm
by ezamps
m22_jack wrote:I've searched with absolutely no luck.
Every winter my zx450 starts _groaning_ until it gets warmed up. After speaking to a tech several years ago, I discovered it's a common problem when the crossover pots are fouled. Since it was warming up at the time, I sort of let the issue rest.
That was several moves and several computers ago and the part number has long since been lost.
The part is marked B10K, which is a pretty generic marking for a 10k audio potentiometer. However, that doesn't give much information regarding power rating, etc.
If anyone knows the part #, I'd sure appreciate the information. Thanks in advance.
Matt
It's a basic 10k log (B taper) quad pot. I had a few but recently tossed them. Oops. These are hard to find because of the many variations of shaft types, case size and resistance. You can try searching surplus places, but I have to tell you that you likely won't find them. Won't PG sell you one? They used to do this...
On the other hand, it seems weird that the only thing that causes this problem is a pot. You can certainly test this by putting the whole amp in a freezer overnight and trying it out. Use a heat gun on LOW to pinpoint the faulty component. Or do the reverse (this is easier) and buy some freeze spray that will chill components one at a time, waiting for them to "thaw" before squirting another. I bet you'll find it's actually an OPAMP IN the crossover circuitry, and not a pot. Those are easier to find.
Posted: Thu Oct 04, 2007 1:40 pm
by 1moreamp
Call Phil at PG I am sure he has them for a price, but they will be exact parts, and no guessing.
My wonder is how and why they are failing on you ? I have another client local to me that killed his but he played with them everyday, all day, instead of buying a EQ.
Constant fiddling with these can cause them to die, but normally I have never had any issues with PG pots that were set and left alone. Since they are sealed you cannot clean them which is done on the open ones regularly. but here again being sealed I am wondering how and why they are getting dirty and noisy ???
Phil at PG the parts manager, the 800 number is on their website which has changed name to RODIN. best of luck C