oxxe Messages: 1 Registered: May 2014 Location: Germany
Junior Member
Hey there, I'm new here, so HELLO to everybody!
I've found a Kustum K150-8 in my grandpas house.
Now i decidet to refurbish this thing.
Almost all pots are scratching and I thougt i would easyly replace them.
Now I'm searcing for these CTS Pots with long windings.
Does anyone have a clue where i can order those?
Many thanks in advance!!
By the way two more questions:
The serial nummer is : 77496
When was the amp build?
The four speakers were all put parallel together.
It looks a kind of selfmade
To which impedance is the amp stable?
pleat Messages: 1452 Registered: June 2004 Location: Belding, Mi
Senior Member
First off, Welcome to the site.
I would try cleaning the controls with a control spray cleaner. I'm not sure the pots are ava. other than from a donor amp. One of the tech guys may have a better answer if the pots can still be purchased and where.
From the serial number, it should be between July - December 1971.
The speakers are 8 ohms if original and would be wired in series/parallel for a 8 ohm total load to the amp.
What color is your amp?
Willkommen! Your English is much better than my German, so I won't try anything more in German here.
You are lucky that your grandfather had a great amp for you to find. The original pots were custom manufactured and will not be available to purchase through any regular supply sources.
Pleat is right in suggesting that you clean the pots with a good quality control cleaner. I use a product made by Caig called DeoxIT. I don't know if you can find it where you are located, but it does a great job of cleaning and lubricating old noisy pots.
And yes, tell us what color it is and post a photo if you can.
stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
Since all the boards in these amps unplug I would do so to remove them from the amp an then if you have soldering skills I would then unsolder the pots one at a time from the board, spray them out and then solder them back in.
Sometimes what I do on boards that the pots can be a big time project to unsolder out, I will drill a hole in the board on top of the pot that is big enough in size to let the spray nozzle get into the slot area of the pot.
If you do this you must be sure that 1, you are not drilling into any other circuit part or board trace and 2, when drilling you must hold the board in a way to not let any drill shavings get down into the pot.
pleat Messages: 1452 Registered: June 2004 Location: Belding, Mi
Senior Member
The amp is a K150-8 Self contained 4x10 so the pots can be sprayed cleaned without removing the pots or drilling holes in the circuit boards, but that is a great idea on the K150 and K250 slant metal face amps.