Goodrich Volume Pedal w/ Extra Taper Pot

Riley Hart · From: South Carolina, USA

Hola!
Back in the '80's I used to own a Goodrich Pedal with 2 pots. One had the string, and the other was accessible via a large knob that you could roll with your foot, and the pot(which I recall was another 500k), was mounted in the 'third jack hole'.

This arrangement provided me with ability to alter the sweet spot in the taper.

Does anyone still have one of these, or knowledge to provide wiring?

Thanks, Riley.

David Nugent · From: Gum Spring, Va.

Riley...If you have a Goodrich '120' pedal, I have the pot and knob. I recently converted one of the pedals you described to a standard model by replacing the pot with a second output jack. Should be a fairly simple procedure to reverse the process.

Jim Palenscar · From: Oceanside, Calif, USA

I believe that the pedal you are referring to is a Goodrich model 6122 which has a separate pot on the side that changes the taper of the volume pot as well as having an impedance matching device powered by a 9v battery.

Riley Hart · From: South Carolina, USA

Thanks...David has generously offered to ship the pot and the knob to me so I can do the conversion. What i remember about the pedal I used to own, is that it had no active electronics at all, strictly passive, not that it may not have been tampered with before I got it, but worked very well without the active parts.

I still don't have a wiring diagram though, and still looking...

Thanks, Riley.

Jack Stoner · From: Kansas City, MO

That could have also been the "Myrick Mod" that was done to many volume pedals in the 70's.

Here is a schematic of the Myrick Mod - An added 500K pot labeled "Tone" in the schmatic

.

Riley Hart · From: South Carolina, USA

Thanks Jack. That circuit looks like it would do what I need. Can't argue with anything "Myrick" lol...

Richard Sinkler · From: aka: Rusty Strings -- Missoula, Montana

I had the Goodrich pedal that Jim spoke about with the big black wheel, and it indeed had a pc board and a 9v battery. That may have been only for the built in "match box".

I didn't like that pedal and removed the wheel and pc board shortly after I got it. Unfortunately, I threw out the parts years ago.

Does the Myrick mod just add a tone control or does it affect the taper of the volume pot. This may not be the same (don't know, but doesn't sound like it).
_________________
Carter D10 8p/8k, Dekley S10 3p/4k C6 setup,Regal RD40 Dobro, Recording King Professional Dobro, NV400, NV112,Ibanez Gio guitar, Epiphone SG Special (open D slide guitar) . Playing for 55 years and still counting.

Jack Stoner · From: Kansas City, MO

That extra pot, as its labeled, is sort of tone control.

Don Sulesky · From: Citrus County, FL, Orig. from MA & NH

I have one of those 1622 Goodrich pedals I bought in the mid 70's.
I took the tone control out of the pedal and put in another output jack for my tuner.
I keep it in my SUV as a spare pedal.
Don
_________________
Private one on one lessons available
Member: FSGC, PSGA, TSGA
Co-founder: Florida Steel Guitar Club

"Steel guitar is like playing chess in the dark with three players". Jeff Newman quote from 1997 seminar

Tom Wolverton · From: Carpinteria, CA

by the way, did the cost of a new Goodrich jump? Like by about 30% ?
_________________
To write with a broken pencil is pointless.

David Nugent · From: Gum Spring, Va.

The pot that was removed is labeled '2 meg' rather than '500K' which leads me to believe it is a factory model rather than the 'Myrick Mod'.

Lee Baucum · From: McAllen, Texas (Extreme South) The Final Frontier

I just found one of my old Goodrich brochures. It lists their standard Model 120, along with a Model 122.

MODEL 122: "Similar to Model 120, plus a variable taper control which is easily adjusted by the foot. Has one input and one output."

The same brochure lists the Model 6122, which has the impedance matching device, requiring a 9-volt battery. Along with the Model 6122, they list a Model 6122R.

MODEL 6122R: "This pedal is like our Model 6122, except that in place of the tone control it has a taper adjustment. This makes it possible to vary the amount of pedal travel required to go from off to full volume."
_________________
Lee, from South Texas - Down On The Rio Grande

There are only two options as I see it.
Either I'm right, or there is a sinister conspiracy to conceal the fact that I'm right.

Williams Keyless S-10, BMI S-10, Evans FET-500LV, Fender Steel King, 2 Roland Cube 80XL's,
Sarno FreeLoader, Goodrich Passive Volume Pedals, Vintage ACE Pack-A-Seat

Riley Hart · From: South Carolina, USA

Wish to thank everyone for the input. Pedal has ben successfully serviced, thanks to Dave, Jack and all of ur help.

The schematic posted here works fine with the 2meg pot;

Godfrey Arthur · From: 3rd Rock

Hi Men and Women of Steel,

I'm new to the list, new to steel actually. Have been following off and on waiting for the day. Just picked up a Sho Bud Pro 1 and eager to pay my dues. Happy to be amongst you. I have been listening to steel for years but will now try and learn it.

I have a similar Goodrich pedal I picked up used at Guitar Trader in San Diego in the late 70's. Thought I'd add to the archives with some quick photos and information.

It has the large knob, a 9vdc powered circuit in the pedal. But this knob is a TONE CONTROL not a come on volume taper setting. Without a battery, the pedal passes no sound at all. It is as I got it, have not modified anything on it. If it has been modified I would not know. There is no model number in the number field on the bottom cover. No other lettering or info marks
that I can see anyway from Goodrich. Looks like the steel pivot post would
have to be driven out to disassemble the pedal?

The battery compartment has been
routed different than some. I've seen them sideways.

Marks l, ll, lll, were placed, perhaps by the
previous owner, on the
knob to make it easier to hit
some favorite tone spots. lll is max trebel roll-off with l being no roll-off..

The volume pot
looks to be the original that came with.

The pot for the tone knob
is an AB "MOD POT."

You can see
there is a bridge for circuit connects.

Without taking the pedal apart,
you can see a cap and a resistor
although there is more of the
circuit not seen in the photo.

The tone sweep on this is crisp and clear perhaps due to the active circuit. I have no idea at this point if the tone equalization is passive or active.

I used it on a steel track once, a veteran player not I, and it worked and recorded well.
_________________
ShoBud The Pro 1
YES it's my REAL NAME!
Ezekiel 33:7

Lane Gray · From: Topeka, KS

No need to drive out the shaft, back out the set screw and it slides out
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects

Godfrey Arthur · From: 3rd Rock

Jim Palenscar · From: Oceanside, Calif, USA

While it can slide out, typically the tension on the spring in the back makes it so that driving it out is a more accurate term Smile

Godfrey Arthur · From: 3rd Rock

Lane Gray · From: Topeka, KS

omitted step 3A:
disconnecting the spring makes removal of pivot pin a snap (forgot about that sucker)
_________________
2 pedal steels, a lapStrat, and an 8-string Dobro (and 3 ukes)
More amps than guitars, and not many effects

Godfrey Arthur · From: 3rd Rock

Godfrey Arthur · From: 3rd Rock

A correction may be in order. I found this photo on the forum, of a Goodrich pedal with similar knob and similar white number marks. Ergo, my presumption that the marks were placed on my used pedal by a previous owner may be wrong and looks to be something that Goodrich themselves placed at the factory.

_________________
ShoBud The Pro 1
YES it's my REAL NAME!
Ezekiel 33:7

Forum Index > Electronics		Next oldest topic :: Next newest topic