pot for volume pedal

JOZEF SMITH · Post by **JOZEF SMITH** » 24 Jan 2009 1:57 pm

Any recommendation what size pot to use to replace the one in a Goodrich volume pedal?
Thanks.

Paul Norman (RIP) · Post by **Paul Norman (RIP)** » 24 Jan 2009 2:22 pm

500k ohms. Most any Steel guitar dealer has them.

JOZEF SMITH · Post by **JOZEF SMITH** » 24 Jan 2009 2:39 pm

THANK YOU PAUL. I PUT A 250 K IN THERE BUT I DON'T LIKE IT. REGARDS,
JOZEF.

Pat Comeau · Post by **Pat Comeau** » 24 Jan 2009 3:05 pm

difference between 250k and 500k?...is it the trow of the volume?..

Chuck Snider R.I.P. · Post by **Chuck Snider R.I.P.** » 24 Jan 2009 4:42 pm

The goodrich pedals should have a 500K pot in them. Not sure what a 250K pot would do, but if you want the correct one in there, replace the 250K with a 500K.

Someone is selling a new one they just got from Bobbe Seymour over in the Amps and Accessories listings for $25 delivered. Go to this http://bb.steelguitarforum.com/viewtopic.php?t=150675

You can also get one of the Dunlop pots from Tom Bradshaw's website for $25 delivered.

-Chuck

Pat Comeau · Post by **Pat Comeau** » 24 Jan 2009 10:16 pm

What's the difference between the Dunlop 500k pot at 25$ and these 500k at 2.49$

http://www.guitarpartsdepot.com/500K-50 ... olume.html

David Pinkston · Post by **David Pinkston** » 25 Jan 2009 5:13 am

I ordered one from Tom Bradshaw.

Larry Scott · Post by **Larry Scott** » 25 Jan 2009 6:08 am

I installed the Dunlop hot pottz 2 in my goodrich yesterday.It's a great pot no noise and oh so smooth.

the dunlop pot is 470k and you can obtain from Tom Bradshaw.

Here is a great link for complete install instruction
from Greg Cutshaw.

http://www.gregcutshaw.com/Goodrich%201 ... 20Pot.html

Ronnie Boettcher · Post by **Ronnie Boettcher** » 25 Jan 2009 9:00 am

On the pot that is $3.00, The shaft is way too short to use it in a Sho-Bud pedal. I bought one for $9 at guitar center one time and I had to modify the shaft to get it to accept the little barrel that goes on the shaft. Not worth the aggravation.

Sonny Priddy · Post by **Sonny Priddy** » 25 Jan 2009 9:07 am

Bobbe seymour at steel guitar Has A Good Pot. Give Him a Call.(615-822-5555) SONNY.

Ned McIntosh · Post by **Ned McIntosh** » 26 Jan 2009 10:52 pm

The Canadian PEC pot in my Goodrich L120 volume pedal went scratchy after just a month.

Knowing that pots can go bad fairly quickly, I had ordered 3 of the Dunlop Hot Potz from Tom Bradshaw as a backup so I just replaced the PEC straight out. About the only thing that took a little tweaking was positioning the new pot so it turned off fully at the top of the pedal-travel...no big deal, just took a little fiddling to get it just so, and making sure the pedal stops mechanically before you get to the very end of the track (which means the pot is actually taking the strain of limiting pedal travel which is not good!).

I opened up the PEC (the rear cover comes off really easily) and dropped a bit of light oil onto the tracks, but with 2 extra Dunlop pots I don't see me going back to the PEC any time soon. I'll put the PEC on a decent digital multimeter and see if there is any discontinuity in the resistance but I doubt I'll see any.

The Dunlop from Tom is a very smooth pot and seems to be working just fine for me. With our rate-of-exchange three Dunlops is close to $Aus150, but if that's what it takes to get long-lasting pots then that's what they cost.

Buying quality is like buying oats. Good oats cost what the market asks for them...if you'll settle for the oats after they've passed through the horse, well that's cheaper!

Donny Hinson · Post by **Donny Hinson** » 27 Jan 2009 4:25 am

Pat Comeau wrote:What's the difference between the Dunlop 500k pot at 25$ and these 500k at 2.49$

Aside from the shaft, the cheap pot has a cheap (thin, spray-deposited) resistance element. It'll last about a week in a volume pedal. It's primarily designed for "set and forget" applications, and not those where it's going to be adjusted dozens of times every minute.

Lee Baucum · Post by **Lee Baucum** » 27 Jan 2009 6:48 am

Jozef - The pots that Tom Bradshaw is selling are wonderful.

Ned - You probably have enough pots to last a lifetime, if you bought three!

Lee, from South Texas

Don Brown, Sr. · Post by **Don Brown, Sr.** » 27 Jan 2009 7:29 am

NTE has the exact replacement Mil-Spec (military spec) for the Allen Bradley 500K.

Check these four out from Mouser which is a great company also.

Mouser

Pretty good prices as well.

Enjoy

Greg Cutshaw · Post by **Greg Cutshaw** » 27 Jan 2009 8:53 am

Don, Mouser is a great place to buy parts!

Unfortunately all the pots in the Mouser list you referenced have the wrong taper. They are all LINEAR taper as are most industrial pots. They do however have conducitve plastic elements.

Greg

Don Brown, Sr. · Post by **Don Brown, Sr.** » 27 Jan 2009 9:14 am

Hi Greg,

I should have explained I put up that page, to show the pots. They have over 7,000 in stock, but they'd be pretty hard to find if a person didn't know electronics. Since they're listed under "Passive" out of a ton of listings.

I prefer the carbon as opposed to the plastic film. But that will get them to where they need to go from there to find anything along the pot lines.

I should have listed NTE's site. I've bought tons of electronic parts off of them years back.

It's hard for me to believe that pots that use to cost so little, cost so much today. Guess I'm getting old.

But I'll add here: For the one's not knowing, exactly what it is they'd be buying, it's best to pay the higher price and buy off of the one's who are selling off the forum. Such as Tom B., Bobbe S., and a few others. Otherwise you may buy something that wouldn't work for your use.

PS: You have an email.

Don

Sam Lewis · Post by **Sam Lewis** » 27 Jan 2009 10:18 am

Jozef, if you have not found a pot for your Goodrich pedal let me suggest contacting
Franklin Steel Guitar Co
712 May Drive
Madison, TN 37115
1.615.865.4754

I have 2 Goodrich pedals and have bought pots from the Franklins (they are great people) and have never had a bit of trouble with them. You wont find nicer people than Paul and Mrs Franklin.

Chris Boyd · Post by **Chris Boyd** » 27 Jan 2009 1:14 pm

Has anyone replaced their 500K pot with the Dunlop pot in a newer Goodrich L120? I just looked and the clearance in the back is VERY tight already with the claristat pot. The dunlop solders in from the back and its 3 posts may not clear...?? Thanks..

Ned McIntosh · Post by **Ned McIntosh** » 27 Jan 2009 9:50 pm

Chris,

My Goodrich L120 was bought from Carter with my steel a couple of months ago so it should be representative of current models.

I had no clearance issues with the three solder terminals on the Dunlop, but I did have to extend one of the three wires (the brown, I think) so the pot would reach the slot in the metal bracket. Just make sure to route the string correctly, it's easy to forget to throw the second turn around the pulley. My pedal has a mechanical stop for full down, so the body of the pot itself isn't used as the down pedal-stop. So far all is well.

The PEC pot that came with the pedal was "delicate", with a carbon-track you'd need a microscope to see. I have 2 spare Dunlops and I may well order another three from Tom, just for security of supply.

Greg Cutshaw has a full replacement/re-stringing page on his website for the Goodrich pedals. Well worth a look.

b0b · Post by **b0b** » 27 Jan 2009 10:04 pm

Pat Comeau wrote:difference between 250k and 500k?...is it the trow of the volume?..

250k bleeds off some highs to ground. 500k has more presence. That's why we use 500k.

Chris Boyd · Post by **Chris Boyd** » 28 Jan 2009 5:34 am

Thank you Ned...much appreciated info..I ordered a Dunlop from Tom last night..it'll be nice to heave this crappy claristat pot!

Chuck Snider R.I.P. · Post by **Chuck Snider R.I.P.** » 28 Jan 2009 7:49 am

Chris, when I replaced the pot in my Goodrich pedal, after opening up the case and looking inside, I initially thought there was no way that Dunlop pot would fit. I called and spoke with Tom Bradshaw about it. He assured me it would fit. He also told he he had tried ALL bracket configurations in all of the Goodrich pedals, and the Dunlop pot does fit all of them. He said he has suggested to some, that although unnecessary, if they wanted they could apply a piece of electrical tape onto the side of the pedal case between the case and the pot terminals.

I went ahead and made the solder connections and mounted the pot. And just as Tom said, though it was close quarters, it did fit, and the terminals did not touch the side of the case. There was about 1/8 inch clearance. I did not apply any tape, I figured that should be enough clearance so as not to be an issue.

-Chuck

Chris Boyd · Post by **Chris Boyd** » 28 Jan 2009 8:06 am

Thanks Chuck..I have two L-120's and the newer one has the tighter clearance...both need new pots... hopefully the Dunlop will last far longer than the cheezo claristat ones....

Chuck Snider R.I.P. · Post by **Chuck Snider R.I.P.** » 28 Jan 2009 9:12 am

By the way, out of curiosity I called and spoke with Bobbe Seymour about the PEC pots he is selling. He feels the particular pots he is selling are good pots as well. As a matter of fact he feels that, with all respect to Tom Bradshaw, the Dunlop pot is not necessarily the ideal pot to go with. Bobbe feels his pots are of comparable quality to the Dunlop, and better in the way of amount of travel in the throw of the shaft. He said they have done some testing on the pots they carry and he stands behind those he is selling. As he told me, "If I really felt the Dunlops were superior, he would be selling those instead of the ones made by PEC."

Since I have not done any sort of test of the two and cannot quantify testing results with either pot, I don't want to get in the middle of something contraversial. However I told Bobbe that in fairness to him I would suggest his pots as an additional option to stock pots, and/or replacement pots.

I do have firsthand experience with the Dunlop and can talk about that, and based on Bobbe's comments, his PEC pots are also a viable alternative and worth considering. If you have any specific questions about the PEC pots he is selling, you will need to contact Bobbe.

-Chuck

Greg Cutshaw · Post by **Greg Cutshaw** » 28 Jan 2009 12:20 pm

The Dunlop pot has a smaller housing than the old Allen Bradleys. The throw is the same. Since the housing of the pot is used as a stop, you may want to add a bumper (1/8") either on the pot housing or on the case of the Goodrich to make the pedal travel equal to the Allen Bradley pot.

Greg

The Steel Guitar Forum

pot for volume pedal

pot for volume pedal

Volume Pot

Pot