Switch - Vibrato LDR, for Fender® Amps

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Switch - Vibrato LDR, for Fender® Amps

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Optocoupler. Vibrato LDR for Fender Amps. Fix the dead LDR-style tremolo on your vintage Fender amps as well as others.

  • Non-polarized optical side is indicated by silver dot and slightly longer leads
  • Resistive side is indicated only by slightly shorter leads
  • This neon lamp optocoupler is commonly referred to as a roach
Item ID:
Replacement Type:
Product Measurements by Type
Item Length1.295 in.
Item Width0.347 in.
Packaging Information
Packaging Dimensions1.3 in. × 0.4 in. × 0.4 in.
Weight (Packaging)0.003 lbs.

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Specifications, Files, and Documents

GIF: Specification Sheet Specification Sheet9.26 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on May 31st, 2017.
Matt H
May 31st, 2017
Hi Gary, we do not offer technical services. We advise you consult a local tech.
Asked by Anonymous on April 5th, 2018.
April 6th, 2018
Staff Member
This part appears to be equivalent to the Fender part 16282 from all information we were able to locate.
Asked by Anonymous on August 15th, 2018.
August 15th, 2018
Staff Member
This optocoupler can be safely installed with the silver dot face up or face down. The dot represents the non-polarized side, so pay close attention when installing this part. Installing with the silver dot in the wrong direction can result in damage to your amp.
Asked by Anonymous on March 15th, 2021.
March 15th, 2021
Staff Member
Hey Martin. The side with the dot is a neon bulb so it won't read with a multimeter. The other side is the photosensitive resistor which measures very high resistance with no light present. Once the bulb is lit, the resistance will drop.
Asked by emanoelraiff85 on August 11th, 2022.
August 16th, 2022
Staff Member
This is just the standard optocoupler found in most Fender amps. We aren't familiar enough with the Vibro-King's vibrato circuit to say whether or not this is the correct optocoupler for it.

Product Reviews

5.00 out of 5 based on 2 reviews
mizewell - October 9th, 2021
5 out of 5

I replaced the faulty bug in my 65 Deluxe Reverb AB763 with this one. The old bug was blinking erratically, and producing a very weak tremolo. This LDR fixed the problem, and was easy to install.

Michael Sudberry - December 18th, 2019
5 out of 5

Great Replacement for my 70s Silverface Deluxe Reverb. Works Great!