Heathkit HP-23 Power Supplies

[Glen Zook]

The HP-23 has fixed and adjustable bias and both 6.3 VAC and 12.6 VAC filament voltages.  The HP-23 has to have a wire changed to give the low B+ (either 250 VDC or 300 VDC).  It works only on 120 VAC and has a pilot lamp.  Also, it has a fused plug and an on/off switch.

The HP-23A has fixed and adjustable bias and 6.3 VAC and 12.6 VAC filament voltages.  It has a switch to change the low B+ which is also the off/on switch.  The fused plug is replaced with a circuit breaker and it can be wired for either 120 VAC or 240 VAC operation.

The HP-23B has only fixed bias and 12.6 VAC filament voltage.  It has a switch to change the low B+ which is also the off/on switch and a circuit breaker.  The HP-23B can be wired for either 120 VAC or 240 VAC operation.

The HP-23C goes back to the hard wire selection of the low B+ and has no off on switch.  It does have a circuit breaker.  It only has fixed bias and 12.6 VAC for the filament voltage.  The HP-23C can be wired for either 120 VAC or 240 VAC operation.

The PS-23 is identical to the HP-23C.

Glen, K9STH

Website:  http://k9sth.com


--- On Tue, 4/28/09, RONALD SLATER <countrylake34 at VERIZON.NET> wrote:

Heathkit offered a series of these supplies..HP-23 A,B,C. What's the difference?..Ron


      

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