PI-tank almost done

I’ve almost gotten the PI-tank completed now on the 2x4CX1500B amplifier. I also added some padding capacitors for the C2 cap, so we can get up to 4200 pF of total capacitance on the C2. I also added feed-through capacitors to all the vacuum relays and the stepper motors.

The next step is to mount the potentiometers for the stepper motors, so we can know exactly the position of the capacitors, and no need to count steps of the motors. I also ordered some current sensor transformers which will be used to sense the current to the control and screen grid. For measuring the current from the anode I will just use a resistor and measure the voltage drop over it (at the cathode side).

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