Version 1.32
15
Connect point X5 on each main PCB to its corresponding output transformer terminal
A3 (shown on figure 4 above).
For connecting the EL34 valve bases to the output transformers, starting with the left
PCB, link a wire from pin 3 on valve base V1, to terminal A1 on the output
transformer. Pin 6 on V1 (105R resistor), goes to the transformer terminal A2. Pin 3
on valve base V2 goes to pin A5, and pin 6 goes to terminal A4. The right PCB is
connected the same way.
The amplifier is now connected in ultra linear mode. For Triode mode connect pin 6,
to A1 (is B+ position) and A5 respectively on the output transformer. For Pentode
mode connect pin 6 from V1 and V2, to A3 on the output transformer.
Configuring The Output Transformer For PSE Mode:
Figure 5. 2.4K primary for maximum power triode connected
Figure 6. 3.6K primary for lower distortion with better low frequency, but lower
output.
