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ATTN: Chicago Bill [message #16633]

Sun, 05 February 2012 11:36

Kustom_Bart
Messages: 601
Registered: October 2010
Location: Greenville, MichiGUN

Senior Member

I have a K-50 with a bad treble/bright pot. The bright push/pull works fine but the treble just spins and doesn't make any adjustment. I am looking for a replacement pot new or used or for a way to try to repair the original pot. Any ideas bill or anyone else?

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Re: ATTN: Chicago Bill [message #16634 is a reply to message #16633]

Sun, 05 February 2012 15:29

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

Because Kustom used special pots on all but the Frankie heads, you will not be able to find a replacement very easily. Antique Electronics used to have some NOS parts, but I don't know if they have or ever had the pot that you need. The main problem is the mounting method. They mount through the pc board, so they have a very long threaded mounting shaft.

There may be a broken piece inside the pot that is not allowing the shaft to turn the wiper, or the wiper is not contacting the resistance element, or the resistance element may be broken.

Does the knob turn 360 degrees or does it still stop at the normal ends?

What I've done in the past, is remove the pot from the board and take it apart. Then I can fix or replace whatever needs to be done. I will use internal parts from new pots to.

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Re: ATTN: Chicago Bill [message #16635 is a reply to message #16634]

Sun, 05 February 2012 16:09

Kustom_Bart
Messages: 601
Registered: October 2010
Location: Greenville, MichiGUN

Senior Member

Thanks Bill. I may have to look for a doaner. The knob turns 360 degrees with no stops and no change in sound. The push pull works though. I may take the Trem/vibe knob and move it over to the treble spot. I don't care about the trem/vibe.

[Updated on: Sun, 05 February 2012 20:38]

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Re: ATTN: Chicago Bill [message #16637 is a reply to message #16635]

Mon, 06 February 2012 09:34

cassent5150
Messages: 341
Registered: August 2009

Senior Member

Bart, I got a pot here with a broken shaft you may be able to use to fix yours The #'s on it are 133-0020-00 and 137-7034. I also have a couple of the dual pots with a switch but dont know the values on them other than they have 137-7034 and 133-0028-00stamped on them. If anyone has a parts list to ID the pots, maybe we have a match. Let me know if I can help, e mail me at

cassent5150@hotmail.com

Steve C

Steve C

[Updated on: Mon, 06 February 2012 09:39]

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Re: ATTN: Chicago Bill [message #16638 is a reply to message #16637]

Mon, 06 February 2012 09:49

cassent5150
Messages: 341
Registered: August 2009

Senior Member

Here is a picture of what I have. Keep in mind the one on the right with the brown cover has a broken shaft. Here's the link to the photo

http://www.flickr.com/photos/57807996@N04/6829892153/

Steve C

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Re: ATTN: Chicago Bill [message #16639 is a reply to message #16633]

Mon, 06 February 2012 10:18

Kustom_Bart
Messages: 601
Registered: October 2010
Location: Greenville, MichiGUN

Senior Member

Mine is like one of the 3 black ones on the left as it is a push/pull for bright and treble. the push pull works great and the treble doesn't register at all and turns 360 degrees. I want to be able to adjust the treble....lol!

I sent you an e-mail Steve

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Re: ATTN: Chicago Bill [message #16643 is a reply to message #16633]

Mon, 06 February 2012 20:23

Kustom_Bart
Messages: 601
Registered: October 2010
Location: Greenville, MichiGUN

Senior Member

Thanks for the phone call today Steve, it was very nice talking with you. Thank you very much for sending the pot to me so I can get this thing repaired. I am sure that one way or the other will fix it. I super glued all of the plastic pieces back together and the stops work now but the whipper works to about half way and then goes to null so I have off to half then off after that....lol! I normally run on halfway anyway, but it has to done correctly.

Thanks again.

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Re: ATTN: Chicago Bill [message #16645 is a reply to message #16643]

Mon, 06 February 2012 23:34

cassent5150
Messages: 341
Registered: August 2009

Senior Member

I'll still get it out to you and that should get it working with full control. Glad to be able to help, I cant take these parts with me when I'm gone and I'm sure I dont need three while I'm here. Let me know when ya get it in and what results you get. Steve C

Steve C

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Re: ATTN: Chicago Bill [message #16647 is a reply to message #16633]

Tue, 07 February 2012 06:34

stevem
Messages: 4730
Registered: June 2004
Location: NY

Senior Member

Bart, if you measure the pots resistance across the two out side lugs what do you read?

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Re: ATTN: Chicago Bill [message #16649 is a reply to message #16647]

Tue, 07 February 2012 07:25

pleat
Messages: 1452
Registered: June 2004
Location: Belding, Mi

Senior Member

The K50 schematic shows values, 50K volume, 100K Treble, 100K Bass, 100K Speed, 100K Intensity, and 10K reverb pots.
pleat

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Re: ATTN: Chicago Bill [message #16651 is a reply to message #16649]

Tue, 07 February 2012 08:30

cassent5150
Messages: 341
Registered: August 2009

Senior Member

The three I've got are checking out at 56 K on the top pot and the bottom pot is 205 K or to be exact its .205 on the 2 M setting of my meter. Will it still be ok? Steve C

Steve C

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Re: ATTN: Chicago Bill [message #16652 is a reply to message #16651]

Tue, 07 February 2012 09:55

Kustom_Bart
Messages: 601
Registered: October 2010
Location: Greenville, MichiGUN

Senior Member

Yes it will work just fine.

Thanks again,

Bart

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