W8ZR HIGH VOLTAGE POWER SUPPLIES
Each power supply controls up to three RF decks, automatically transferring high voltage, low voltage, and all control function to the selected RF deck. One power supply (2600V or 2900V) is intended for amplifiers using the 3CX800A7 triode or GU-74B tetrodes, and the other supply (3800V or 4500V) for the 8877 or pulse-rated 3CPX800A7. The different voltage taps can be assigned to any of the selected amplifiers. The control logic uses CMOS ICs to interlock the circuitry so only one amplifer can be on-line at a time (although all amplifiers can run filaments, blowers, and low voltage circuits simultaneously.) The plate transformers are custom manufactured by Peter Dahl and are rated at 1.5A CCS.