The electric guitar revolutionized popular music a half-century ago, and continues to be its greatest tool of expression. Before this, instruments were mechanical and acoustic alone. Now, through electronic technology, our electrified beat enthralls the world with harmony and joy!


Howard (Mick) Davis


Terms of Service - BELOW

Is Your Pedal Worth Fixing or Upgrading?

Reconditioning and Value

Need an Alignment?



How Loading and Cables Affect Your Sound and What to Do About It

All About BYPASS

How Guitar Effects Work

Distortion: the Good, the Bad, and the Ugly

Sound and Power

Tubes vs. Solid State

Stones, Clones, and Muffs

Who I Am and What I Do - plus the secret to happiness!

Links to Good People, Information, Resources, and Products



BSEE Summa Cum Laude, Cooper Union 1976.

ELECTRO-HARMONIX: Manager of Analog Circuit Design, 1976 to 1981. Designed the Deluxe Memory Man, Deluxe Electric Mistress, and many other classic pedals during this period and subsequently as a consultant.

PIGTRONIX: Inventor of the Mothership Guitar Synthesizer and Rototron Rotary Speaker Simulator. Designed the analog circuitry in all Pigtronix products now on the market.

XVIVE: Engineer-designer and consultant since 2013.

For information on ANALOG CIRCUIT DESIGN - ELECTRONICS ENGINEERING SERVICES, please send an inquiry with technical details to:


Guitar Pedal Repairs and Custom Modifications

I do not sell schematics or parts.

Engineering responsibilities have priority, but I still often find time for selected repair and modification work, primarily on vintage Electro-Harmonix pedals of my own design such as the Deluxe Memory Man and Deluxe Electric Mistress. I do not service Pigtronix, Xvive, or other pedals built with surface-mount (SMD) components. I do not service vacuum tube or digital equipment; analog solid-state only. Feel free to e-mail for a list and description of the custom mods available for your specific Electro-Harmonix pedal. I do not service the Russian-made reissue pedals.


No serviceperson can quote you a fair price for a repair without first finding out exactly what is wrong, what parts will be needed, and how much labor will be required. Any estimate given without this information being known is a "guesstimate" - and often is higher than necessary. If you are given an estimate without any preliminary diagnostic work, should the actual repair only take five minutes, many service people will still charge you the full guesstimated amount. Some will give you a "lowball" guesstimate to get your business, then charge more than you expected when the work is done. By doing diagnostic work prior to giving an estimate I protect you from such nasty surprises.

A bench fee is normally charged for the diagnostic work required to determine what is wrong. This is fair compensation for that work, and is credited towards the total parts and labor cost if you decide to go ahead with the repair. If desired, I can give you a free estimate based on the problem as it is described to me, but it must be understood that without any diagnostic work this estimate may not be accurate.

may be physical, or electrical, as from the application of excessive voltage. TAMPERING includes a previous unsuccessful repair attempt, or any undocumented modification whether successful or not. Pedals with these conditions require far more time and labor for test and diagnosis, and I must charge accordingly. In some cases such pedals are damaged so badly that it would cost more to fix them than they are worth. In cases of damage or tampering the diagnostic bench fee is higher than otherwise, but of course is fully deductible from the total parts and labor cost if you decide to proceed with repair. This charge applies however even if repair is not feasible, and must be paid in advance in certain cases.

I do not service surface-mount component board, multi-layer board, or digital equipment; analog solid-state only.

Occasionally I receive a pedal that has nothing wrong with it, the problem actually being in other equipment it was being used with. Sometimes a problem is intermittent, and cannot be detected until it shows up again. In such cases, a bench fee plus shipping/handling is charged, and the unit is returned as-is. The bench fee is FULLY DEDUCTIBLE from the parts and labor charge for any repairs done on the same unit for the same problem within 30 days from the date of return shipping.

RECONDITIONING: If needed and desired, I can cosmetically recondition (clean, touch up paint scratches, and relacquer) the box of any Electro-Harmonix guitar pedal so it looks almost like new when you get it back. Reconditioning, like custom mods, can raise the resale value of a pedal considerably. Deep scratches, bends, dents, and rust staining cannot be removed.

My turnaround time is short. The work is usually completed within a few days of receiving your pedal. Unless agreed otherwise beforehand (as for a diagnosis and estimate), receiving the pedal will be considered consent to proceed with the work. Unless requested otherwise, please send no payment until you are billed after the work is completed.

For FAST SERVICE: Please pay PROMPTLY with a POSTAL money order, Western Union money transfer, CERTIFIED check, or CASH. I will then ship your pedal within a day or two of receiving payment. DO NOT send payment by certified mail - first class mail ONLY, no signature required. Otherwise, due to bad postal service here, I may not get it. Please email me the Western Union money transfer control number and the EXACT name you used to purchase it if you pay that way.

For SLOW SERVICE: Pay by personal or company check or a non-postal money order. There will be A DELAY of TWO TO FOUR WEEKS until payment clears the bank before shipping.



Shipping is usually the most time-consuming part of the repair cycle. I ship by FedEx Ground. Shipments carry insurance, but there is a service charge for filing a loss or damage claim.

Due to BAD postal service here, please ship to me by UPS or Fed Ex only - NOT THE USPS. I take no responsibility for shipment delays, loss, or damage, which occasionally occur - mostly with the USPS. The post office here does not deliver but just leaves a pickup notice. I DO NOT go there and wait on line to do their work for them. ONLY use the USPS to buy a postal money order for payment, and send it to me only by first class mail, no signature required.

Due to postal/shipping issues, I no longer offer international service.

If you live in the NYC area you can save the shipping costs both ways by bringing your pedal to my place in Brooklyn and picking it up when the work is done. I give priority to work that does not require shipping and receiving hassles.


Please pay promptly when billed. Should payment not be received within one month of the billing date, a weekly STORAGE CHARGE will begin to accrue. Should a bill remain unpaid three months from the billing date, the unit will be considered ABANDONED PROPERTY and WILL BE SOLD or DISASSEMBLED FOR THE PARTS, unless previously agreed otherwise with the sender.

I warranty all repair work, parts and labor, for 30 days from the date of shipment to you. This warranty is VOID if any damage, tampering, attempted repair, or modification has occurred subsequent to my delivery to the shipping carrier.

CONTACT ME prior to sending any pedal to be certain I can fix or mod it. If so, I will send you my shipping address.

ENCLOSE with the pedal:

1) A detailed description of the problem needing repair and/or a list of the mods desired.
2) If you have been given a cost estimate, enclose a copy of that email.
3) Your full name and return shipping address, and email address.

I will notify you by email when I receive your pedal, when the work is completed, and upon receiving payment and shipping it back to you.