Recycling Amp

 

Schematic (GIF 29k)

 

 

Description

This is a little amplifier I tried to build from used parts. The input section is very similar to an old Fender Bassman (bass, treble and DEEP-switch). The power amp consists of a single ECL86 triode/pentode which delivers 4 watts into 2 ohms (if so much...). I gave the pentode a triode conversion switch and made an adjustable feedback loop (the upper control knob in the last picture). Still have to work on this. The power transformer induces some hum because it is too close. Maybe I should try toroidal transformers, but then it's not "vintage" anymore...
Update 11/14/03: Thanks to Manfred Stelzer for the corrected schematic!

 

 

Pictures