Cobra 146 gtl scratchy recieve

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tejanodrum
Newbie
Newbie
Posts: 1
Joined: Thursday 11th Mar 2010, 16:11
First Name: herb
Location: clovis nm

Cobra 146 gtl scratchy recieve

Post by tejanodrum »

Radio Make and Model: cobra 146 gtl
PCB Number:
PLL Number:
Test gear available: freq counter, 1040 cb service master, multi-meter.
Symptoms: scratchy noise from recieve audio and when touching cb thru the speaker. Audio is fuzzy.

What is working: everything

What has been tried: external speaker

Did it suddenly happen ?: no
Anything else that may be of help?: no
zodiac
Technical Helper
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Posts: 319
Joined: Sunday 7th Nov 2004, 13:58
Location: UK

Re: Cobra 146 gtl scratchy recieve

Post by zodiac »

Try changing the electrolytic capacitors around the audio IC. Two of them are only 10v but change C132 first 330uF @ 16v.
Electrolytic capacitors dry out with old age and cause problems.
How far is it.
Twice it's length from halfway.
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