[Premium-Rx] Fw: TenTec RX340 Question

[Arthur Delibert]

Last week I asked on this reflector about an RX340 that lost its memory every time it was switched off.  For the benefit of anyone else who has that problem, the issue was indeed the battery for the battery-backed RAM, U3.  Below is information from Chuck Yarbrough, KI4BJZ, about the specific type of battery needed.

Thanks to all who responded to my request for info.

Art Delibert, KB3FJO
________________________________
From: Chuck Yarbrough <wampus61 at gmail.com>
Sent: Sunday, November 24, 2024 7:07 PM
To: Arthur Delibert <radio75a3 at msn.com>
Subject: Re: [Premium-Rx] TenTec RX340 Question

Art—

It does sound like the Backup battery has failed. I believe that the original model/type is still commercially available.

It is available on Amazon:
[Stmicroelectronics Battery/Crystal Snaphat, Snaphat-28 - M4T28-BR12SH1]<https://www.amazon.com/dp/B00AZVHDDG?ref_=ppx_hzod_image_mob_ap_fed_asin_title_0_0>
Stmicroelectronics Battery/Crystal Snaphat, Snaphat-28 - M4T28-BR12SH1<https://www.amazon.com/dp/B00AZVHDDG?ref_=ppx_hzod_title_mob_ap_fed_asin_title_0_0>








You can’t miss the battery—it is bright yellow. The yellow portion snaps into a connector on the mainboard. It should pop out and then the new one should be able to pop in. Just make sure the four pins are seated in their sockets.

I have been researching this and will test the replacement procedure this week.

I hope this helps.

Chuck KI4BZJ

On Sun, Nov 24, 2024 at 4:15 PM Arthur Delibert via Premium-Rx <premium-rx at mailman.qth.net<mailto:premium-rx at mailman.qth.net>> wrote:
My RX340 loses its entire memory every time I shut it down, including all saved memories, its operating frequency, mode, etc.  It's as if I had restarted it in the "Clear" mode.

In the manual, I see a reference to a battery-backed RAM, U3.  Could that battery be the cause of this problem?  Does anyone know where it's located, and whether there are any tricks to replacing it?

Thanks.
Art Delibert, KB3FJO


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