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Courier 23+ won't key up

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adamf
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Courier 23+ won't key up

Post by adamf » Monday, 07 August 2017, 13:46 PM

Hi all, I have a Courier 23+ in Excellent shape, was sitting on the shelf for a few years and was working but went to try it and it won't key up. Receive is fine but won't transmit. When I key the mike it makes sort of a buzzing noise but will not key. It is NOT the mic (works on another Courier plus I tried 3 different mics for the Courier 23+ but all the same. I even swapped out the relay with a good working one but no different. I looked the radio over inside but can't see anything so hoping someone may know what the problem is? Thanks for any help. Adam


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MDYoungblood
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Re: Courier 23+ won't key up

Post by MDYoungblood » Monday, 07 August 2017, 14:17 PM

If the relay isn't closing it is the cap. I don't have a schematic for the Courier but the buzz or hum is a capacitor that helps hold the relay closed during transmit, I can't tell you which one it is.

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Re: Courier 23+ won't key up

Post by adamf » Monday, 07 August 2017, 15:46 PM

Thanks Greg, I was thinking it was a cap, perhaps someone can tell me which one it might be? Again, thanks for any help. Adam

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adamf
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Re: Courier 23+ won't key up

Post by adamf » Tuesday, 08 August 2017, 9:25 AM

Just a quick note, I tested it again to see if I could determine anything and when I key up it is the relay that is buzzing. Again, the relay is fine so it is something else. Adam

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MDYoungblood
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Re: Courier 23+ won't key up

Post by MDYoungblood » Tuesday, 08 August 2017, 12:13 PM

So the relay clicks into transmit or not clicking over at all?

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Re: Courier 23+ won't key up

Post by adamf » Tuesday, 08 August 2017, 12:48 PM

Hi, no transmit, it just buzzes, no clicking. Thanks, Adam


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