Unique Tube Amps for Guitar

About
Prices
Projects
Repairs

The Repairs

Valco Tremo-Tone

Royal Freshman

Kay 703

JMP Super Lead

Acoustic 370

Kay 703-C Repair

This is a small Kay 703-c from the 60's. It has an unusual set of tubes - 18GD6A, 60F15 and 36AM3. The amp looked pretty beat up, and it had not been used in some time.

The first issue was to add a 3-prong power cord and an isolation transformer. This amp connects the AC directly to the heaters, which is a real hazard. If you plug the 2-prong cord in the wrong way, the chassis would get 120 volts -- ouch!

In addition, the old electrolytics were replaced. It had an old multi-section cap can that looked fine, but it's too old to take chances.

The results were fantastic! This amp has some serious blues and rock mojo. It's small, light and gets some nice cleans with the volume down, and great distortion when dimed (turned up to 10).


Check out my tube guitar amp repair blog (on MySpace)

Natural health research and writing is my main career. I'm a licensed naturopathic physician. www.naturdoctor.com and LinkedIn

Building and selling tube amps for guitar and HiFi is a hobby based on my previous career as an Electrical Engineer. Ampersand Amps