Dave:<div><br></div><div>I built my own battery out of 10 C cells in series. I tapped the bottom 2 to get the 3 Volts for the 2DF4 final tube's filament. But don't forget the nichrome wire in series with this tap. It drops the battery's 3V down to 2V, plus it prevents a current surge, when you hit the PTT switch, from popping the filament in cold conditions.&nbsp;</div><div><br></div><div>73 de</div><div>Gene Smar AD3F&nbsp;<br><br><div id="ymail_android_signature">Sent from my Radio Shack TRS-80 model 100 laptop</div> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Wed, Apr 22, 2026 at 6:38 PM, KD2GIY via MRCA</div><div>&lt;mrca@mailman.qth.net&gt; wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> <div id="yiv0331722947"><div><div>On my trip to MD and DE I came across a very good deal on a working prc-25 on the Jeep dock.&nbsp;</div><div><br></div><div>I understand the radio needs 2 different voltages and it would be a pain in the ass to fabricate this.&nbsp;</div><div><br></div><div>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?</div><div>I've seen pictures of some that take d batteries.&nbsp;</div><div><br></div><div>I have looked and cannot find anything but used original dead batteries.&nbsp;</div><div><br></div><div>Thank you for your time.&nbsp;</div><div><br></div><div>Best regards<br>Dave<br>KD2GIY</div></div>
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