Question about Cobra 29 WX NW ST 40-Channels Base CB Radio
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: cobra 29 WX
This "talkback" feature may be due to someone having modified the radio by adding a small resistor between the speaker circuit & circuit ground.Another cause could be the shield lead in the mike plug shorting to the plug itself.
Posted on Jul 20, 2008
Hi - You can download the manual from the link underlined in blue below:
75 WX ST
Other info here.
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Posted on Aug 31, 2008
SOURCE: cobra 29 ltd modulation problen
You need to check the modulation on a modulation meter. Just because the meter doesn't peg, doesn't mean the modulation isn't working. Usally a meter pegging, means the swr's are too high or the meter is misadjusted. If in fact the modulation is low, their is a pot inside the radio (VR4) that will add gain to the modulation circuit. This setting is legally supose to be set by a qualified technician.
Ed Meshechek ( Radio Man )
PO Box 1696
414 6th St.
Posted on Dec 03, 2008
SOURCE: no receive cobra 29 ltd classic
Hi and welcome to FixYa,
Initially, pls confirm that there is modulation (transmit audio). The reason I asked is if IC4 (TA7222P) is blown, then the radio would have no audio amplifier which would explain no receive audio. Additionally, the final and pre-final (TR15 & 15) gets is modulated TX+12 through D8 from T1 which in turn is the output of IC4 through C48.
Perhaps a schematic diagram may be of further help.
Good luck and Thank you for using FixYa. Happy Holidays.
Posted on Dec 18, 2008
ANL stands for "Automatic Noise Limiter" and NB stands for "Noise Blanker".
The ANL gets rid of a lot of interference noise caused by mechanical noise from motors and other electronic components in a car.
It also gets rid of noise from other sources of interference.
The NB is for extreme cases of noise, but can slightly lessen your receive sensitivity.
Basically both functions help decrease interference noise.
Posted on Nov 24, 2010
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