Joe Audio – Red | CTHBoard

Compact Tube Hybrid Amplifier – Printed Circuit Board

$15

“The Compact Tube Hybrid Amplifier” designed by Alex Cavalli and ‘cfcubed’ is almost legendary. Currently at version 1.3b, CTH has matured into a sonic powerhouse – a tube rollers dream.

In stock

Product Description

“The Compact Tube Hybrid Amplifier” designed by Alex Cavalli and ‘cfcubed’ is almost legendary. Currently at version 1.3b, CTH has matured into a sonic powerhouse – a tube rollers dream. CTH has the following features:

  1. Compact Tube Hybrid fitting on a 75mm X 120mm board (able to fit: Hammond 78mm X 120mm X 43mm case).
  2. No trimpots in front end. Rolling 12AU7 class tubes consists of turning off amp, pulling one tube & inserting another. Can be 6922 class tubes too (switch for 6.3V / 12.6V heated tubes). Many other tube types have also been found to work well (6F8G, 6CG7 6GU7).
  3. Runs tubes at 80V, about twice plate voltage of some other hybrids.
  4. Uses discrete output buffers, rail splitter, driving most all conventional/dynamic headphones with ease.
  5. Implements variation of AMB’s e12 muting delay & offset protection (with red and green LEDs).

 

Our CTH boards have a red mask to distinguish them as supplied by Joe Audio. We’ll soon be providing a variety of kits and options, making this amp/build one of the best investments you’ll ever make.

Additional Information

Weight .5 kg
Dimensions 5 x 2.5 x .2 cm