The design is inspired by the guitar amps of ... The circuit is a pretty conventional single-ended one with a two stage double triode preamp and a single power output tube. The transformers ...

The pentode is controlled with the pre-amplified signal and acts as a power amplifier ... schematic should be all you need to get started. If you want some more background information about tube ...

It utilized four EL34 output tubes, one GZ34/5AR4 rectifier tube, two 7199 input (driver) tubes, two ultralinear output ...

Part 5 provides spec summary of the GP/R K2-W vacuum-tube op amp and discusses measurement ... 1. Shown in the schematic is the setup used to evaluate open-loop gain vs. frequency for the K2 ...