[ARC5] Power Supply for ARC5 transmitters

[J Mcvey]

 The Hp23 has a plate voltage of 820v , The max plate voltage for the the 1625 is 750V, but the other components were not designed for this potential. resistive dividers would dissipate greater than 50 watts! So, not an option in this case. The variac may be the best choice if you have one beefy enough to handle the wattage.
I assume you are going to run a separate power supply for the filaments? Are they still at 24volts series-parallel or was this T-22 converted to 12v?  I recall that DC is required because of oscillator circuit (1625) uses the filament in the feedback loop.
Do you have the MD7 modulator? That would simplify things greatly.

    On Monday, February 24, 2025 at 05:03:08 PM EST, Russ Tine via ARC5 <arc5 at mailman.qth.net> wrote:  
 
  Thanks for all of the advice!I will begin experimenting with the HP23 and Variac.
73,
Russ K1RWT
    On Monday, February 24, 2025 at 02:12:39 PM EST, arc5-request at mailman.qth.net <arc5-request at mailman.qth.net> wrote:  
 
 Send ARC5 mailing list submissions to
    arc5 at mailman.qth.net

To subscribe or unsubscribe via the World Wide Web, visit
    http://mailman.qth.net/mailman/listinfo/arc5
or, via email, send a message with subject or body 'help' to
    arc5-request at mailman.qth.net

You can reach the person managing the list at
    arc5-owner at mailman.qth.net

When replying, please edit your Subject line so it is more specific
than "Re: Contents of ARC5 digest..."


Today's Topics:

  1. Re: Power Supply for ARC5 transmitters (Dennis Monticelli)


----------------------------------------------------------------------

Message: 1
Date: Mon, 24 Feb 2025 11:11:47 -0800
From: Dennis Monticelli <dennis.monticelli at gmail.com>
To: kgordon2006 <kgordon2006 at frontier.com>
Cc: "arc5 at mailman.qth.net" <arc5 at mailman.qth.net>, Russ Tine
    <rtalfa at yahoo.com>
Subject: Re: [ARC5] Power Supply for ARC5 transmitters
Message-ID:
    <CADgAsSRUzmGOfehfp9Zs8WB8n+qnRF7Hjc2ZhO7cHzZ1zf08Mg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

You could always put a variac on the HP-23 and use a separate transformer
for the filaments.  That way no mods and no wasted power either.

On Mon, Feb 24, 2025 at 11:09?AM kgordon2006 <kgordon2006 at frontier.com>
wrote:

> Many of you may find the information on this page to be helpful:
>
> http://www.w7ekb.com/glowbugs/Military/arc5pages.htm
>
> Ken W7EKB
>
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>
>
> -------- Original message ???---'
>
> 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
>> ________________________________________
>>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20250224/281ca356/attachment.html>

------------------------------

_______________________________________________
ARC5 mailing list
ARC5 at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/arc5


End of ARC5 Digest, Vol 253, Issue 26
*************************************
  ______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20250225/612f6665/attachment-0001.html>