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Hoffman Amps Forum image Author Topic: Mesa Boogie ; Pots needed  (Read 7391 times)

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stratele52

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Mesa Boogie ; Pots needed
« on: February 23, 2013, 08:02:59 am »
I'm looking for 2 pots for Mesa Boogie Head ,  .50 caliber +
These pots are for Presence and for Reverb . Customer broke the shafts

Can't find these pots on the web. I just find one place in United State but they don't ship in Canada.

Can you help me ?

Thank's

amprepairparts.com/pots.htm  : they don't ship

Here whats I need and they have it ;

POT, MESA BOOGIE, 100K OHM LINEAR, (B100K), SOLDER LUGS, 24mm DIAMETER BODY, LONG "D" TYPE SHAFT, 3/8" BUSHING.  Used in many earlier Mesa Boogie amps, especially their early combos.  This pot has a plastic "D" shaped-shaft.  Original Mesa Boogie part # 591050.  DOES NOT INCLUDE NUT OR WASHER.  IF NEW NUT IS NEEDED, ORDER THE JNUT-38 NUT FOUND IN THIS SECTION
Part #MB-591050
$5.95
 
 
POT, MESA BOOGIE, 250K OHM AUDIO, (A250K), SOLDER LUGS, 24mm DIAMETER BODY, LONG "D" TYPE SHAFT, 3/8" BUSHING.  Used in many earlier Mesa Boogie amps, especially their early combos.  This pot has a plastic "D" shaped-shaft.  Original Mesa Boogie part # 591048. DOES NOT INCLUDE NUT OR WASHER.  IF NEW NUT IS NEEDED, ORDER THE JNUT-38 NUT FOUND IN THIS SECTION
Part #MB-591048
$5.95
 
amprepairparts.com/pots.htm

Offline Geezer

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Re: Mesa Boogie ; Pots needed
« Reply #1 on: February 23, 2013, 08:56:25 am »



It looks like a standard 24mm solder lug pot to me, just needs to have a "D" shaft on it.

Mouser, Newark, pretty much anyone will have that pot. Probably a Canadian company that has it, too...... It doesn't have to state it's specifically for a Mesa, just find the correct value, taper, lugs and shaft type and you're done!

G
« Last Edit: February 23, 2013, 08:59:17 am by Geezer »
   Cunfuze-us say: "He who say "It can't be done" should stay out of way of him who doing it!"

Offline kagliostro

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Re: Mesa Boogie ; Pots needed
« Reply #2 on: February 23, 2013, 09:00:06 am »
Can you find what you are looking for here ?

http://www.tubeampdoctor.com/catalog.php?product_search=mesa%20boogie%20pot

they ship in Canada, but, unfortunately shipping price is very high  

so you must find it at your side of the pond :sad:

K
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Offline sluckey

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Re: Mesa Boogie ; Pots needed
« Reply #3 on: February 23, 2013, 09:12:47 am »
Do the knobs pushed onto a knurled shaft or do they have a setscrew? If setscrew, it's easy to convert a solid shaft into a "D" type shaft.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #4 on: February 23, 2013, 10:14:25 am »



It looks like a standard 24mm solder lug pot to me, just needs to have a "D" shaft on it.

Mouser, Newark, pretty much anyone will have that pot. Probably a Canadian company that has it, too...... It doesn't have to state it's specifically for a Mesa, just find the correct value, taper, lugs and shaft type and you're done!

G

No they have not , I checked on ther web site

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #5 on: February 23, 2013, 10:21:06 am »
Do the knobs pushed onto a knurled shaft or do they have a setscrew? If setscrew, it's easy to convert a solid shaft into a "D" type shaft.

Not set screw , I never saw a D shaft with set screw.  Not knurled too.

To convert , yes easy , but I have to find a "medieum/ long" shaft a with log/ audio pot. This will be my second choice.
For now , I install pots with  round shaft  and screw type knob so my custumer can use his amp. I have time to find the original pots.

Thank's

Offline VMS

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Re: Mesa Boogie ; Pots needed
« Reply #6 on: February 24, 2013, 06:11:10 am »
Have you asked from your area authorized repair places?

http://www.mesaboogie.com/US/Dealers/rep_select_2.php



stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #7 on: February 24, 2013, 07:02:53 am »
Have you asked from your area authorized repair places?

http://www.mesaboogie.com/US/Dealers/rep_select_2.php




Not yet but this will be one of my other options .  I'm on this forum to find a place where I can order these part on the web. For now I fix the amp with round shaft pots with screw type knobs I have in stock . So my customer can use his amp . There is no rush for parts

Offline VMS

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Re: Mesa Boogie ; Pots needed
« Reply #8 on: February 24, 2013, 07:21:45 am »
To narrow your search, according to this place the potentiometer is most likely CTS 450 series pot:

http://www.meinlshop.de/de/mesa-boogie/ersatzteile/elektronische-bauteile/potentiometer/potentiometer-591050/

with 3/4", 7/8" or 1" flat shaft.

http://www.ctscorp.com/components/Datasheets/450sp.pdf

Haven't find online shop yet, but digikey may have the 100k linear pot.

« Last Edit: February 24, 2013, 07:27:47 am by VMS »

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #9 on: February 24, 2013, 07:24:03 am »
To narrow your search, according to this place the potentiometer is most likely CTS 450 series pot:

=591050]http://www.mesaboogie.de/suche.html?tx_solr[q]=591050

with 3/4", 7/8" or 1" flat shaft.

http://www.ctscorp.com/components/Datasheets/450sp.pdf

Haven't find online shop yet, but digikey may have the 100k linear pot.

 


Thank's ,
I have data sheet since friday and for linear pot ,yes it is easier to find , but where I can order the 250 K log / audio pot I'll find the 100 k too.
« Last Edit: February 24, 2013, 07:27:28 am by stratele52 »

Offline sluckey

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Re: Mesa Boogie ; Pots needed
« Reply #10 on: February 24, 2013, 07:26:58 am »
Quote
For now I fix the amp with round shaft pots
Do these pots have the correct shaft diameter/length for the original knobs? If so, just file a flat on the shafts.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #11 on: February 24, 2013, 07:30:32 am »
Quote
For now I fix the amp with round shaft pots
Do these pots have the correct shaft diameter/length for the original knobs? If so, just file a flat on the shafts.

No , too short , I think of that before. I scrap one pot for a test , make a flat shaft.

Offline VMS

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Re: Mesa Boogie ; Pots needed
« Reply #12 on: February 24, 2013, 07:35:16 am »
If the original pot is otherwise Ok, then you can order any value pot and just change the shaft.

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #13 on: February 24, 2013, 02:13:17 pm »
If the original pot is otherwise Ok, then you can order any value pot and just change the shaft.


Great idea to order the shafts.

stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #14 on: February 28, 2013, 06:24:38 am »
Fews days ago a I send a e-mail to CTS asking them if they can send me 2 free sample of molded plastic shaft . They answer to me , yes they will put in mail. Great company. Waiting for the shafts.

My customer , the amp owner, think he could ordered Mesa Boogie pots from USA ,with the help of the business he work. waiting for some news.


stratele52

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Re: Mesa Boogie ; Pots needed
« Reply #15 on: April 10, 2013, 06:45:48 am »
If the original pot is otherwise Ok, then you can order any value pot and just change the shaft.


Receive some shaft fews week ago, I just dismantle pot ; can't replace the shaft ,it is all in one plastic  uit shaft and wiper.

A real joke...

Offline kagliostro

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Re: Mesa Boogie ; Pots needed
« Reply #16 on: April 10, 2013, 09:34:58 am »
Can't you use a small aluminium pipe (or aluminium duct tape) ad acrylic glue to connect the broken shaft with the new shaft ?

or, can't you find a new pot with round shaft and mold it with a file as to obrain a D shaft ?

K
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Offline eleventeen

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Re: Mesa Boogie ; Pots needed
« Reply #17 on: April 10, 2013, 09:42:49 am »
Reminds me of the faucet-rebuilding zone at Home Depot.

It's not like I wish we lived in 1974 Soviet Union or anything, but isn't it just great that we have 19 different kinds of pot shafts? We just *have* to have this, right?

 


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