Wall wart help

ampulman · Sep 14, 2014

I guess I tried to stretch the power cord for my PRO-160 too far, as the plug separated from the cord.

Of course, I can't lay my hand on instructions so I'm guessing that with the + on the plug lined up with the flat on the cord, the center conductor is positive, as indicated on the radio.

Will a kind soul please verify that I'm right.
Thanks.

Amp

KC4RAF · Sep 14, 2014

Generally the center conductor is

positive. Some times you'll find the reverse to be the case. If it's marked +, then you're correct.

ampulman · Sep 14, 2014

rafdav said:
positive. Some times you'll find the reverse to be the case. If it's marked +, then you're correct.

I'm 99+% sure it's + center pin according to the diagram on the radio. The RS supplied wart can be configured for + or - center conductor. What I'm asking is whether the 'flat' on the cable is the indicator for + or - .

Amp

RDGDigital · Sep 14, 2014

I don't have a PRO-160 to compare with but the PRO-160 manual says it is powered by DC 12V with a positive (+) tip. (See page 6 of the manual at the mentioned link)

wtp · Sep 14, 2014

sorry about the size

- -c.- +
if you can see the decimal point and raise it a little and see that on the side of the radio that is a positive tip.
think negative sign dash c for outer connector decimal for center dash and +for positive.
the radio might have it flipped around but you will get the idea.

ampulman · Sep 15, 2014

wtp said:
- -c.- +
if you can see the decimal point and raise it a little and see that on the side of the radio that is a positive tip.
think negative sign dash c for outer connector decimal for center dash and +for positive.
the radio might have it flipped around but you will get the idea.

I'm sorry, but I'm not following you with regard to the decimal point. Yes, I have determined (with 99% certainty) that the center conductor (radio) is positive.

For the sake of clarity, let me restate my question: it really centers around the Radio Shack wall wart. The cord ends in a 2-pronged socket which is not polarized. The user selects the appropriate plug which can be used with multiple equipment in either + or - center conductor mode. The mode is chosen by flipping the plug 180 degrees.

There is a 'flat' on the end of the cord. Does this serve as the point of reference with the +/- marks on the plug? The plug has pulled away from the cord. This is my problem.

Thanks.

Amp

jim202 · Sep 15, 2014

ampulman said:
I'm sorry, but I'm not following you with regard to the decimal point. Yes, I have determined (with 99% certainty) that the center conductor (radio) is positive.

For the sake of clarity, let me restate my question: it really centers around the Radio Shack wall wart. The cord ends in a 2-pronged socket which is not polarized. The user selects the appropriate plug which can be used with multiple equipment in either + or - center conductor mode. The mode is chosen by flipping the plug 180 degrees.

There is a 'flat' on the end of the cord. Does this serve as the point of reference with the +/- marks on the plug? The plug has pulled away from the cord. This is my problem.

Thanks.

Amp

Don't you own a volt meter? Use of the voltmeter will let you know what polarity you have.

ampulman · Sep 15, 2014

jim202 said:
Don't you own a volt meter? Use of the voltmeter will let you know what polarity you have.

I had tested the socket on the line (DUH), not the plug. Tried it, and the center connector is positive--scanner working.

Thanks.

Amp

Wall wart help

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