Adapter problem

[Ken Weitzel]

Dear members,

During a visit in the US I purchased a couple of X2X wrist watch 2-way
radios, including the adapter. I enjoyed the product very much. When I
returned to Israel, where I live, I tried to recharge the batteries, and I
used 200-to-110V adapter, to which I plugged the original XA10 adapter.
Unfortunately, due to malfunction of the down-converter, the XA10 adapter
burned out. I want now to buy a transformer, here in Israel, and to use it
directly as the adapter for charging my X2X batteries. I understand that the
adapter output should be rated 9VDC @100mA (2.2W). I need only information
regarding the plug that goes to the wrist-watch. It looks like
stereo-headphones plug- and I need to know the polarity of the voltage,
namely, on the three terminals, which is the positive, the negative, and
what is the third one. Please help me with it. I want to enjoy the 2-way
radio here, just like I did in the US.
Thank you in advance,
Dr.Y. Gofer

Hi...

You're surely going to get far better info than I can
give you (old, long retired) but maybe get you at least
started.

First suggestion is that it's highly unlikely that the
power adapter plug is really "like a stereo headphone
jack" (that would necessitate shorting it at least
momentarily as it was inserted/removed) So, respectfully,
are you sure?

Second would be that you examine the connector with both
your reading glasses and the biggest magnifying glass you
can get ahold of. Standard practice is to mark polarity
on such jacks; but on a wristwatch size device it will be
very tiny.

Third, 100 mils at 9 volts seems an awful lot for any
battery that could be put into a wristwatch. That spec
may be correct, but there must be some current limiting
resistor in series.

Just a start.

Ken

 

[Geoffrey S. Mendelson]

During a visit in the US I purchased a couple of X2X wrist watch 2-way
radios, including the adapter. I enjoyed the product very much. When I
returned to Israel, where I live, I tried to recharge the batteries, and I
used 200-to-110V adapter, to which I plugged the original XA10 adapter.
Unfortunately, due to malfunction of the down-converter, the XA10 adapter
burned out.

Good thing it did. These radios are ILLEGAL to import, own or operate in Israel.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel [email protected] N3OWJ/4X1GM
IL Voice: (077)-424-1667 IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838
VoN Skype: mendelsonfamily. Looking for work as a CTO or consultant in
handheld gaming, large systems development, handheld device construction, etc.
See U.S. patent applications 20050108591, 20050107165.

 

[Gofer]

Dear members,

During a visit in the US I purchased a couple of X2X wrist watch 2-way
radios, including the adapter. I enjoyed the product very much. When I
returned to Israel, where I live, I tried to recharge the batteries, and I
used 200-to-110V adapter, to which I plugged the original XA10 adapter.
Unfortunately, due to malfunction of the down-converter, the XA10 adapter
burned out. I want now to buy a transformer, here in Israel, and to use it
directly as the adapter for charging my X2X batteries. I understand that the
adapter output should be rated 9VDC @100mA (2.2W). I need only information
regarding the plug that goes to the wrist-watch. It looks like
stereo-headphones plug- and I need to know the polarity of the voltage,
namely, on the three terminals, which is the positive, the negative, and
what is the third one. Please help me with it. I want to enjoy the 2-way
radio here, just like I did in the US.
Thank you in advance,
Dr.Y. Gofer

 

[James Sweet]

Good thing it did. These radios are ILLEGAL to import, own or operate in Israel.

So what?

 

[James Sweet]

Dear members,

During a visit in the US I purchased a couple of X2X wrist watch 2-way
radios, including the adapter. I enjoyed the product very much. When I
returned to Israel, where I live, I tried to recharge the batteries, and I
used 200-to-110V adapter, to which I plugged the original XA10 adapter.
Unfortunately, due to malfunction of the down-converter, the XA10 adapter
burned out. I want now to buy a transformer, here in Israel, and to use it
directly as the adapter for charging my X2X batteries. I understand that the
adapter output should be rated 9VDC @100mA (2.2W). I need only information
regarding the plug that goes to the wrist-watch. It looks like
stereo-headphones plug- and I need to know the polarity of the voltage,
namely, on the three terminals, which is the positive, the negative, and
what is the third one. Please help me with it. I want to enjoy the 2-way
radio here, just like I did in the US.
Thank you in advance,
Dr.Y. Gofer

Usually the polarity is shown on the label, if it's not however, what I
would do is crack open the case of the burned out adapter and look at how
it's wired. There should be some rectifier diodes and from those you can
determine the polarity, then just cut the cord off the burned out adapter
and wire it in to the new one.

 

[Ross Herbert]

Usually the polarity is shown on the label, if it's not however, what I
would do is crack open the case of the burned out adapter and look at how
it's wired. There should be some rectifier diodes and from those you can
determine the polarity, then just cut the cord off the burned out adapter
and wire it in to the new one.

This guy posted this same request on this ng back on June 2. My
response then was;

You would have to hope that the 110Vac - 9Vdc plug adapter, in
failing, has not subjected the wrist radio to a severe overvoltage
since this would possibly make it un-repairable.

To find out the correct polarity for wiring the plug you should
dismantle the dead adapter and identify the cable connections back to
the internal circuitry. The cable will probably connect to the pcb
where an electrolytic capacitor is the last dc filtering component
before the cable connection. Since the capacitor is across the dc
output supply and is polarised (black line on side of cap = negative),
you can trace the connections to the corresponding conductors in the
output cable and hence to the associated connector rings on the plug.
The other terminal onthe capacitor will correspond to the positive
output conductor. Check out both conductors using a multimeter on
continuity check or ohms position.

Good luck.

He obviously isn't prepared to, or can't undertake this exercise for
some reason.