[MRCA] Prc-25 battery question

[Tim]

Hi Dave ..My PRC-25 is powered by 2 “D” Cells in series (with a DIY 1 ohm
resistor in series) for the 3 volt 2DF4 TX tube filament and two 6 volt,
4.5 A-H Gel Cells (Power Sonic PS640F-1) in series for the rest of the
electronics. It all fits in the stock battery box and I can charge the Gel
Cells by connecting pin leads to the Power connector female pins when the
Z-1 plug is removed.

The 1 ohm resistor in the filament line is needed to drop some voltage
(from fresh batteries) to the tube filament when it is cold-started. Mine
is made from about 8 feet of 30 gauge magnet wire wound on a high value
resistor as a form.With my occasional usage the D Cells last "forever".

Tim

N6CC


On Wed, Apr 22, 2026 at 3:37 PM KD2GIY via MRCA <mrca at mailman.qth.net>
wrote:

> On my trip to MD and DE I came across a very good deal on a working prc-25
> on the Jeep dock.
>
> I understand the radio needs 2 different voltages and it would be a pain
> in the ass to fabricate this.
>
> My question is, does anyone have for sale a drop in battery insert for
> this radio or can let me know where I can find one on the internet?
> I've seen pictures of some that take d batteries.
>
> I have looked and cannot find anything but used original dead batteries.
>
> Thank you for your time.
>
> Best regards
> Dave
> KD2GIY
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