Click to enlargeThe fix for a major problem with
the early Vibro King (Fender) amps.

Modification to repair the problem with the early Vibro Kings. They would burn up the EL84 Reverb tube due to design errors.

The tube is a single ended Class A amp and it was biased way, way too hot - far beyond the capacity of any tube.

The kit is fairly easy to do, and besides making the amp more dependable, the reverb sounds much better without the horrid crossover distortion caused by incorrect bias.


Vibro King Repair Mod
Am537 fender kit$25.00
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FREE SHIPPING ON ANY ORDER OVER $60.00 - FREE!  (in the U.S. only

NOTICE - THE  ORANGE DROP CAPACITORS USED IN OUR KITS HAVE BEEN 100% DISCONTINUED BY THE MANFACTURER FOR EVER. THEY WILL NEVER BE MADE IN THE U.S. AGAIN

HIGH QUALITY Mallory Tubular Capacitors will be included in your kit

we apolgize for this, but no one anywhere was warned or informed in any way prior to discontinuance. 

We can install any and all of our kits in our custom workshop - email for info.

Check out Torres Guitars.com our new info site

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We have all the parts and tubes for ALL the mods. check it out 

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Torres Engineering
2500 Alder #226
Milton WA 98354-7001
 Email   amps006@gmail.com