Cobra 29XLR NO TX

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ronjr1177@yahoo.com
Dead Key
Dead Key
Posts: 10
Joined: Tuesday 4th Jan 2011, 12:49
First Name: Ron
Location: medina ohio

Cobra 29XLR NO TX

Postby ronjr1177@yahoo.com » Thursday 10th Oct 2013, 14:06

Radio Make and Model: cobra 29xlr
PCB Number: uniden
PLL Number: upd858
Test gear available: radioshack test/pwr meter fluke multi tester
Symptoms: no transmit

What is working: everything but transmit

What has been tried: relaced driver and final with new,test tr8 test good,tx alingnment/tweak tx coils a bit then back

Did it suddenly happen ?: yes
Anything else that may be of help?: bought on ebay ,I think this radio may have gotten wet at somepoint as it is from Louisiana a flood ridden state

hamradiotech
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Posts: 3
Joined: Saturday 12th Oct 2013, 10:17
First Name: Clint
Location: Shreveport

Re: Cobra 29XLR NO TX

Postby hamradiotech » Saturday 12th Oct 2013, 10:19

Does the radio go into TX when keying your microphone?

ronjr1177@yahoo.com
Dead Key
Dead Key
Posts: 10
Joined: Tuesday 4th Jan 2011, 12:49
First Name: Ron
Location: medina ohio

Re: Cobra 29XLR NO TX

Postby ronjr1177@yahoo.com » Monday 14th Oct 2013, 15:18

Yes it goes into transmit and you can hear a slight high pitched squeal,i am going to try changing tr8 from parts radio will get back to you..

ronjr1177@yahoo.com
Dead Key
Dead Key
Posts: 10
Joined: Tuesday 4th Jan 2011, 12:49
First Name: Ron
Location: medina ohio

Re: Cobra 29XLR NO TX

Postby ronjr1177@yahoo.com » Tuesday 15th Oct 2013, 9:21

Tried changing tr8 and still nothing,going back in circuit and test more components.

hamradiotech
Newbie
Newbie
Posts: 3
Joined: Saturday 12th Oct 2013, 10:17
First Name: Clint
Location: Shreveport

Re: Cobra 29XLR NO TX

Postby hamradiotech » Tuesday 15th Oct 2013, 11:25

Check TR14 and see if it is switching?


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