[ARC5] ARC5 Power Supply

[Russ Tine]

 Lots of great info here!
Some info I should have mentioned in my original post;
My T-22 is in excellent unmodified condition therefore it still has a 24 volt filament string. I have a 24 volt power supply which is capable of supplying more than enough current.I had originally built a HV power supply using a transformer with a 5U4 for rectification. A PI filter and various capacitors and resistors to provide the necessary voltages. Unfortunately once I keyed down, the voltages sank like a rock. Some design issues unfortunately, which then led me to think about the Heathkit PS.
In any case I will be printing out these responses and items in the links for further review. At this point the Variac solution is what I will try first. If that goes well I will need to work on my original PS.
Many thanks to all and 73,
Russ K1RWT


    On Tuesday, February 25, 2025 at 02:20:40 AM EST, <arc5-request at mailman.qth.net> wrote:  
 
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Today's Topics:

  1. Re: HP 23 for ARC5 (Jim Pruitt)


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Message: 1
Date: Mon, 24 Feb 2025 23:20:02 -0800
From: Jim Pruitt <jpruitt67 at gmail.com>
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] HP 23 for ARC5
Message-ID: <0648cc4a-fd03-458d-bbf2-4b0c74542ce3 at gmail.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Hello Russ

You might consider building a power supply like this:
http://www.arrl.org/files/file/Technology/tis/info/pdf/60hb215.pdf

Diodes can be used in place of the 5U4 tube.

This site built a power supply using a Stancor P8622 isolation 
transformer like this one:
https://www.onlinecomponents.com/en/productdetail/stancor/p8622-12631183.html?srsltid=AfmBOorrFqyW2Mpmn3MWHlJGuu7G3L9B7BhCS-KsgQiZdfK7MlBXCzPn

A picture is at:
amfone.net/Amforum/index.php?action=dlattach;topic=27790.0;attach=26403;image

and the discussion is here:
http://amfone.net/Amforum/index.php?topic=27790.0

He did not give a schematic but it is a simple power supply.

Good luck.

Jim Pruitt
WA7DUY

On 2/24/2025 9:18 AM, Russ Tine via ARC5 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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