Hello, I've been repairing amps for over 55 years now. I've seen many different brands, units, various state of dammages and self inflicted whatever. So you could say that at my age I've seen it all...
But no.
A few days ago I saw a post on these master volume pots for a Fender Twin. You know, the one with the Push-Pull switch.
A twin (combo) came to visit my bench and to my delight it's equipped with 2 orange JBL's 120. Second time in all these years that I encountered this model.
But nostalgia on the side, the volume pot had a problem. I checked the inners and found that the carbon track was broken. I happens that this potmeter is no longer available. So I have to rely on some other version but it seems to be to tall. No luck.
Until I read that article, somewhere...
It seems that CTS pots have the same pcb with various carbontracs (resistance). I had a Mesa Boogie volume pot in my collection and swapped the small pcb.
It fitted 100% and the twin has a fully working volume pot again.
Except the tap for the high pass cap is'nt there. No problem, I placed it over the in- and output of the pot.
So, to make it short (?), all you younger technicians: You are never to old to learn something new. Most of the time it's hidden some where.
Can I say that I'm a dinosaur?
But no.
A few days ago I saw a post on these master volume pots for a Fender Twin. You know, the one with the Push-Pull switch.
A twin (combo) came to visit my bench and to my delight it's equipped with 2 orange JBL's 120. Second time in all these years that I encountered this model.
But nostalgia on the side, the volume pot had a problem. I checked the inners and found that the carbon track was broken. I happens that this potmeter is no longer available. So I have to rely on some other version but it seems to be to tall. No luck.
Until I read that article, somewhere...
It seems that CTS pots have the same pcb with various carbontracs (resistance). I had a Mesa Boogie volume pot in my collection and swapped the small pcb.
It fitted 100% and the twin has a fully working volume pot again.
Except the tap for the high pass cap is'nt there. No problem, I placed it over the in- and output of the pot.
So, to make it short (?), all you younger technicians: You are never to old to learn something new. Most of the time it's hidden some where.
Can I say that I'm a dinosaur?
