GS-35b HF Amplifier
The front panel view shows the Simpson 1.5 Amp Plate and 500 milliAmp Grid current meters. The
turns counter is an E. F. Johnson model 116-208 with 3 digits and a vernier dial for precise
inductance tuning. The 4 switches are "Fan On", "Filament On", "DC On" and "Amp In". They are
wired in sequence, 1st switch through 4th, and can only be switched on in that order. See
schematic for details.