[ARC5] HP 23 for ARC5

Mark K3MSB mark.k3msb at gmail.com
Mon Feb 24 13:14:38 EST 2025


Most of us use a voltage divider for the HV, Screen and Oscillator
voltages.   Easy to build.

The HV needs to be 550V @ 200 mA at a MINIMUM.

Check the specs on your HP-23 variant.   The HP-23B has a HV rating of
700v @ 250 mA.  That should be fine using a variac in front of the HP

Mark K3MSB

On Mon, Feb 24, 2025 at 12:20 PM Russ Tine via ARC5 <arc5 at mailman.qth.net>
wrote:

> Hi Folks,
>
> I'm new to the list, and I am looking for some advice about using an HP 23
> power supply for my T-22.
>
> I still use the power supply for my HW 101, so I do not want to make any
> mods to the PS itself, I would rather add a voltage divider external to the
> PS that I could plug in for the T-22 and remove for the HP 23.
>
> Thanks in advance and 73,
>
> Russ Tine K1RWT
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