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CDM 1550 Problem

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gberny

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Joined
Aug 7, 2011
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4
Hello. I've the above radio. I've been doing OK with it so far until the other day. I mistakenly reversed polarity on the DC cord, popped the fuse, replace fuse, and it powers up, receives OK, and over all is fine with one exception. After this event, I go to transmit. The rig will transmit for a half a second, emit a dual warble tone,but doesn't transmit any further. Power is still on, all other functions are normal. What's this mean? Did I trash the radio permanently? Any resolution? Thanks for your response.
 

gary123

Member
Joined
Sep 11, 2002
Messages
2,571
sounds like an issue with the PA. does the radio put out full power untill the transmitter crashes?
 
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Mar 2, 2005
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Location
parma,ohio
i like to know how you did what you did on the power cable its a Motorola and you can only plug it in one way? i own a cdm1550-ls+ uhf and works great.
 

gberny

Newbie
Joined
Aug 7, 2011
Messages
4
CDM Radio

Thanks to all who responded. Dave was correct. This was an input voltage issue caused by me bumping the variable control knob knocking the voltage down to around ten volts DC, ouch. Live and learn. Thanks all for your response.
 

gberny

Newbie
Joined
Aug 7, 2011
Messages
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Thanks Dave for your reply, and thanks to the others. It was a voltage issue from the power supply being inadvertently knocked down to ten volts DC by me. The rig sure is happier now with a proper supply.
 
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