VK3HJQ Battery Backup for ICOM IC-290H Radio
From the shack of John VK3HJQ. I’ve had this problem with my Icom IC-290H Radio for years, that every time I turned off the power in the shack the radio would lose all its memory channels and I would then have to reprogram them all back in.
This was a simple process as there is only 5 channels in the radio to program but I was getting sick of doing this all the time, so I had a look around on the net and found that ICOM years ago sold a IC-BU1 memory backup battery unit with a NiCAD battery (7.2v 75mah) in it.
So I decided to make my own with parts I had laying around the shack including a NiMH battery (7.2V 180mah).
Click here to download the article including diagram>
Thanks John for sending in this article 🙂
John has some good ideas and home brewing a solution to this problem shows great ingenuity.
I agree that this is an excellent idea for retaining the memory channels in the Icom IC -290H, A practical inexpensive circuit that can be assembled in a few hours time. Thank you John.
Thanks for the nice comment.
Hi Greg aka NG3H
Thanks for taking the time to comment, all the way from the USA (McKees Rocks, Pennsylvania)