Heathkit

SP-2717A HVPS

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    Volumes

    1. Vol 1 Overview: A Regulated HV Bench Supply for Tube Work Dial up 400 V of clean, regulated B+ from a bench box built in 1982 so a breadboarded tube stage never has to wait on its own power supply.
    2. Vol 2 How It Regulates: The Series-Pass Tube Regulator Two 6L6GC beam-power tubes act as a grid-controlled variable resistor between a 600 V raw bus and a 400 V regulated output, and a lone 6AU6 pentode watches the whole show against a stack of ten zener diodes.
    3. Vol 3 Inside This Unit: Hardware, Devices, Outputs & Metering Two 6L6GC beam-power pass tubes, a 6AU6 control amplifier, a stack of ten zener diodes standing in for a pair of long-gone VR tubes, and a chassis built to be turned on and left idling for hours without ever cooking a filament twice.
    4. Vol 4 Using It: Operating Procedure & HV Safety A step-by-step operator's reference for a supply that can put 600 V raw on a filter cap and give you exactly one mistake to learn from.
    5. Vol 5 Calibration & Refurbishing A 1982 lethal-voltage lab supply that has probably sat unused for decades — here is the order of operations that gets it back in spec without hurting anyone.
    6. Vol 6 Cheatsheet & the Generational Pair One laminate for the bench, one table for the shelf next to the IP-32 — same rating, twenty years apart.