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Cdm1550

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NCFire11

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Thunderstorms rolled through today.

Our base station, a CDM 1550 will no longer come on.

We plugged it in to a power wire on one of our existing trucks and it automatically blew the fuse. Is it done for? Repairable?
 

NCFire11

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Im thinking something like that, Im going to put a multimeter on the power supply tomorrow and see what that reads.
 

fineshot1

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Im thinking something like that, Im going to put a multimeter on the power supply tomorrow and see what that reads.
That would be the first suspect - the power supply usually takes the hit on the ac side.

Also be aware that there are some power supplies that once they take a power hit on
the ac side they go into a condition known as "crowbar" and just stop supplying dc
power and they require a reset by simply turning them off for a few seconds and then
powering them back on again to reset the crowbar condition.

Are you sure you had the polarity correct when hooking up the radio to the vehicle power?
 
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NCFire11

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Jul 25, 2007
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That would be the first suspect - the power supply usually takes the hit on the ac side.
Checked it with a multimeter, +13.8V solid, I put an older radio in its place as a backup until we get a new one in.

Also be aware that there are some power supplies that once they take a power hit on
the ac side they go into a condition known as "crowbar" and just stop supplying dc
power and they require a reset by simply turning them off for a few seconds and then
powering them back on again to reset the crowbar condition.
We left the powersupply unplugged all night, and I tried it again this morning, no luck on the CDM1500 but it runs a GM300 fine.

Are you sure you had the polarity correct when hooking up the radio to the vehicle power?
Yes, because it was already wired in on the vehicle and works fine on a CDM1250.




Like I said we have a backup base radio in place and we are filing an insurance report now, other things got hit as well.

Progress energy said we took a direct hit, probably both on the power line and the antenna for the radio.
 
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