Here's a demo of the Guitologist "Pixie" all tube guitar amplifier, which is my take off on a Hammond AO-44 reverb amp. It features two ECL86 (6GW8) triode-pentode tubes, a 6CA4 rectifier, and a 6GH8A triode-pentode. The 6GH8A is also a triode-pentode, similar to a 7199.
This amp has been built into a vintage Trav-L-Bar by Ever Wear. The cabinet opens and shuts, giving you the flexability of open and closed-back tones.
The speaker is an 8" AlNiCo Oxford.
SCHEMATIC: SCHEMATIC: https://www.facebook.com/guitologist/photos/p.626216020837443/626216020837443/?type=1&theater