Battery Tender Plus
www.batterytender.com that I use on the
motorcycle, airplane and
QRP batteries died while in use at the airport. After drilling the rivets out of the case and putting the meter to it the power transformer was found to have an open secondary. Last weekend I was able to attend the
Berryville, VA
Hamfest www.svarc.us/hamfest and purchased a replacement transformer # 241-6-20 from this sheet
www.signaltransformer.com/data/datasheets/241. The unit seems to be working correctly with this transformer installed. Cost for repair was $5. The original
transformer was 1.25 amps and this one is 1.5A so maybe it will last for a while. The Dual Primary transformer
allows for 115/230VAC operation and you need to jumper the primary
appropriately.
Parallel for 115 and series for 230 volt operation. Several small battery chargers that I have used over the years have failed and in three cases it was the transformer. Radio Shack also sells one that worked in another small 12V gel cell charger for about $10 now.
