Here is my diy Nutube preamp. Over a year in the making, I finally feel comfortable posting @ in the tube section. I consider the Nutube a clown tube 🤡 yet very loveable. Specifications are the following :
Dual Mono Layout (using 1 nutube channel per PCB)
6db overall gain, (+) PHASE , 10k input impedance
Input Transformer (2:1) directly coupled to Grid.
Jfet output buffer (LSK489) with cascade current source.
Discrete op-amp Buffered Plate Load
CCS Filament
Adjustable Plate & Grid
Intact Autoformer Attenuators
Startup / Shutdown Muting Shunt Relay Circuit
24vdc
