Thanks for that Four.That's the second time this week you've responded to one of my posts with really helpful information. Out of curiosity, how do you know that the charge port leads go straight to the battery?
The port on the back is directly connected to the battery connectors inside. BUT the connector on the back is not really that secure !
The fact that this connection is not that secure is one of several problems that makes the Seacraft solution less than ideal. In addition to the unsightly, fragile, and poorly secured wire dangling out the back, I doubt the TX balance will be acceptable and I also doubt the TX fits in its case. I'm sure there are other issues I haven't thought of yet.
Even with these limitations, I'm pressing forward with this solution. I keep my 14MZ around for it's backwards compatibility with PPM and PCM and I use it as a backup for my 18MZ on 2.4 when or if it needs service. The problem is that I don't use the 14 very much and every time I do pull it out of it's case, the batteries are jacked up. I spend a day figuring out which batteries I just hate and which batteries to throw away.
Yesterday was the last straw. I took my son's 15+ year old PT-40 trainer out for old times sake (I got it for him when he was 10. He's 29 now). It was very relaxing sitting in a chair with the antenna pulled up with a light breeze blowing the little red ribbon around. The Thunder Tiger GP42 was just purring along. Now that's old school.
As I said, all very relaxing - except for the battery alarm barking out of my $2,000 transmitter. I charged several packs before I left the house. By the time I slipped a pack into the TX at the field it was 50%. After one 15 minute flight it was 28%. At the end of a second 15 minute flight it was alarming. Pause relaxation while I land and put another battery in.
Any nostalgia and relaxation was immediately and exactly offset by my rage at my backup transmitter that never came with a acceptable battery. It occurred to me during my bouts of changing batteries, cussing, and throwing things that somehow the 18 battery lasts for weeks. The 18 turns out to be a very acceptable $3,000(!) solution to the 14s battery problems.
I'd sell this POS except I like the PPM/PCM capability and I like the fact that it is a very capable backup to my 18. Add in the fact they are not selling for very much used and I think I'll keep it around.
If in fact the charge lead goes to the internal battery as you say, it should be sufficient to keep a fully/partially charged internal battery in the TX. If the external lead becomes disconnected, the internal battery should seamlessly power the TX and the low voltage alarm should still alert.
"Well, Nothing bad can happen now."