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Three P110 Won't power up after over voltage

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eportel6607

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Hi guys.
I hope I'm posting this in the correct section.
I have made five VHF "extenders" for our low band system out of P110 portables. Three of them won't power up because they were installed without a "batter eliminator" voltage reduction circuit. Anybody know what component needs to be replaced to get these units running again?

Thanks guys,
Chris
 
WA0CBW

WA0CBW

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Wow! It could be just about any component(s) that are connected to the voltage source. You might start checking any voltage regulation devices or any components directly connected to the power rail. I assume you have already checked any fuses.
BB
 
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jim202

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eportel6607 said:
Hi guys.
I hope I'm posting this in the correct section.
I have made five VHF "extenders" for our low band system out of P110 portables. Three of them won't power up because they were installed without a "batter eliminator" voltage reduction circuit. Anybody know what component needs to be replaced to get these units running again?

Thanks guys,
Chris
Click to expand...


Been a long time since I have worked on any of these radios. I think the battery was a 7.5 volt package. If you put 13.5 to 14 volts to it, I would expect that you fried something or at least blew the fuse. Not very smart.

My other question is I don't believe these radios can be narrow banded. So the only place they still can be used is on marine channels and maybe the ham bands.
 
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eportel6607

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Thanks guys for your input. I wasn't aware of any fuse but shortly after I wrote this post I had taken one of these part to find a cylindrical component under the battery contact housing. It's blown for sure. Any clue if this part is available through a supplier?

Thanks guys,
Chris
 
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ResQguy

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I believe Motorola stopped supporting them over 10 years ago, and since they are pretty much illegal to use on part 90 channels I wouldn't put much effort into repairing them. If you are using them for ham stuff, I see P110s and GP300s in the free piles at most hamfests. Check those out and cut off the fuses.
 
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eportel6607

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Thanks again guys for the info. I have never ran into any issues with these radios until now so I never had to look into a power issue until this incident. So I didn't know the fuse was even there. It turns out that so far only two had a bad fuse, the other one the fuse is good but it still won't power up. I'm assuming that it's some other component on the power board section. Learning as I go.

These radios are being used for HAM by the way. Thanks for the narrow band warning.
I think it might be time to move on for this guy. Find another cheap radio to modify...maybe a HT100 or P1225.
You guys have be very helpful. Thanks,
C
 
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eportel6607

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Just a side note on the usage of any non-narrow band complient radios. From what I understand by talking to a few pros int eh business, these radios should be able to be still used in Marine VHF, the two channels in the MURS band that are still wide band (154.570 and 154.600), and the 2 Meter HAM band. The UHF models can be used in the GMRS band as well as the 70cm HAM band...but I believe that's all they're good for. Nice little radios though. Although the GP300 is a little nicer and compact they appear to be the same radio.
 
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ResQguy

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Yes. I said cut. Like with an xacto knife. Since you would be throwing the remains in the trash.
 
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