Incredibly informative info on preamp tubes.

Tweaking Tubes - Incredibly informative info on amplifier preamp tubes. Substitutions, tricks, what goes where suggestions and performance tricks. Awesome!

$3.00
final notes on web page

Dan's Legendary Book "Inside Tube Amps" is now available on Amazon/Kindle

Copyrightę Torres Engineering 2018. All rights reserved.

Shipping, Terms and Conditions. Privacy Policy.

Torres Engineering

Sandpiper Drive

Yuba City CA 95993

this is not a "walk in" shop

I am Partially retired due to illness, but getting better!

in business 48 years