[MRCA] RF-5020 backup battery

[scottjohnson1 at cox.net]

Tadiran claims to have a version of the 2450 that is rated for a 50-year
service life in memory backup service.

Not that that does many of us any good, but maybe those Gen Z collectors out
there!

 

Scott W7SVJ

 

From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> On Behalf
Of Ray Fantini via MRCA
Sent: Sunday, July 5, 2026 12:22 PM
To: MMRCG at groups.io; Harrisradio <harrisradio at groups.io>
Cc: mrca at mailman.qth.net
Subject: [MRCA] RF-5020 backup battery

 

I have like three 5020 in the shop right now and all of them need new memory
cells on the A7 card. The 5020 appears to want a 3B50 battery that's rated
at 1000mA and somehow think that's a load of crap. Those cells are selling
for almost $50 each! Was thinking of replacing them with a cheaper memory
backup battery? ER32L65 cells are around $10 each, and Tadiran TL-2450 is
about the same amount.

Anyone else have experience swapping out the 3B50 with anything else?

Somehow the backup battery in the head (A20) appears to last a lot longer,
and they are all good.

 

Ray F/KA3EKH

 

 

 

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