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N3FIX > TECH 29.11.18 05:06l 60 Lines 2873 Bytes #999 (0) @ WW
BID : 402_N3FIX
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Subj: New Life for Yaesu VX-1R
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Sent: 181129/0324Z 402@N3FIX.#EPA.PA.USA.NOAM LinBPQ6.0.17
>From n3fix%n3fix.#epa.pa.usa.noam@i0ojj.ampr.org Thu Nov 29 05:00:16 2018
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>From: n3fix@n3fix.#epa.pa.usa.noam
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New Life for Yaesu VX-1R
I can't claim credit for this hot tip. I found this searching the
internet for replacement batteries for the Yaesu VX-1R.
I bought the VX-1R years ago... right after I got my license. It is a
sub-miniature dual band transceiver with wide band receive. It is
perfect for stuffing in your shirt pocket at a hamfest to keep in touch
with your buddies. The problem is that the battery doesn't last very
long with a 700mAh rating, and new batteries are rather expensive.
The Trustfire 14650 battery (that's 14mm in diameter and 650mm long if
you didn't know) are a perfect fit. They are nearly the exact length of
the original FNB-52LI, and maybe just a little shorter. Shorter is
better than longer. To compensate for this I put a small donut magnet
on the positive terminal of the battery. It allows the door to close
with enough positive pressure that it doesn't fall open as it would
without enough pressure on it.
For some reason the 14650 battery isn't as easy to obtain as other
cells. I found them at FastTech for $6.57 for a pack of 2 which have a
PCB (protected) as well. That's with 1600mAh capacity which is over
double the original capacity, and if the first one runs out on a rag
chew, I can just pop the other one in.
So the question is, "Can I charge these cells inside the VX-1R?"
Remember the VX-1R only charges the internal battery when the
transceiver is turned off. There is a circuit board inside the original
Yaesu battery. Checking the spring terminal inside the battery
compartment shows that when the charger is plugged into the radio there
is 6 volts on the terminals of the battery. It will not work to charge
the battery without the battery management circuit.
The original battery capacity is so low, it doesn't make sense to
preserve the original battery. The convenience of having a modern
battery with greater capacity is obvious. The solution was clear. The
original battery must be removed from the case and the new one inserted
in its place. Since I have no spot welder for this task, it must be
soldered. Solder sticks best to battery terminals that have a rough
surface. This is accomplished with an engraving tool gently across the
terminals. With a blazing hot soldering, solder and flux is applied
QUICKLY to provide a good contact patch to sweat the terminals on
without overheating the battery itself.
There you have it. New and longer life for the sub-miniature VX-1R.
Catch you on AllStarLink.
73
de N3FIX
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