Question about Vertex FNB-33, YAESU,FT-11R,FT-41R,FT-51R, 4.8v 1700mAh NiCd 2-Way Radio
I have downloaded the schematic for the FT-11R. It shows a "Contact Unit" as the interface between the rest of the radio and the supplied battery which is 4.8 VDC. The radio is supposed to be able to operate up to 9.6 VDC.
The problem is that the supplied battery pack and the radio have 4 pins going from the radio to the battery pack. Clearly, one pin is + 4.8 VDC, one is ground. The problem is what is the function of the other two pins?
One is labeled "Battery Select" and the other "Adjust" on the schematic, but what do these really do?
Has anyone simply hooked up the + and minus leads to a bench power supply without causing any harm?
de Rich, W6APZ
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Posted on Jan 02, 2017
I have a Yaesu FT-415 and the same problem. My original battery is a SONY 1220-VJ2H (solder tabs, blue insulation on the outer edge and two stick-on paper insulaters) and is soldered in to the Control PC board (mounted vertically). I'm going to get a new battery and hopefully am brave enough to get the soldering iron to the board. It looks like you have to unsolder the board from the speaker to lift it up enough to get at the solder tabs on the battery, luckily I have access to a Pace soldering station with a vacuum pump. I'll hopefully try this next week and get back to you all.
Posted on Jul 11, 2009
Try "Batteries Plus" either online or possibly a local outlet. I found the batteries for my FT51 there and half the price of the factory ones.
Posted on May 20, 2010
Yes, it is possible to use the FNB38 NiMH batteries or any other battery as long as it is the same size and the same volt. Once the battery can fit into the radio and charger and has the same volt, then it is definitely going to work.
I hope the above is clear and understandable, if not, please let me know.
Posted on Apr 25, 2011
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