Question about Cobra Radio Communications
My radio cuts out after short speech on ssb I've been told it's the rf MOSFET.why do they blow and can you upgrade to a more resistant mosfet
Mosfets are seemingly very unstable the culprit probably is too high of dead key on the radio back it down a little and no there is no upgrade also on that radio if someone is real close to you and keys up it can give you what is called front end overload and it will have no receive and will require a trip to the cb shop to correct this problem also if you use the extra channels in it they are hard to understand just what channel you are actually on .........I had one of these radios and I did NOT like it or the cobra 150 . they seem to be very fragile radios............good luck !!!!!
Posted on Apr 27, 2014
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Posted on Jan 02, 2017
SOURCE: talkback on a cobra 200 gtl dx
This procedure is not as simple as just cutting a wire. Note that you can possibly mess your radio up if any maintenace is not done properly. I do suggest taking your radio to a proffesional to have the talkback removed, but, if you really want to do it yourself, go to ghe following link and basically reverse what has been done.
This is the service bulletin for the addition of talkback to the Cobra 150GTL DX and the Cobra 200GTL DX.
As long as the talkback was added correctly, this can be put back origional.
If this does or does not help, please reply on here or email me at email@example.com. I look forward to hearing from you.
Mt. Vernon, TX
Posted on Feb 14, 2008
Depending on the type of power supply, radio frequency (RF) energy from the transmitter may be 'fooling" it into thinking that you're overloading it. Check to see if there's any discernible dimming of the meter lamp when this problem occurs, if so, the supply is the culprit.
Otherwise, its probable that the final amplifier transistors are overheating, either they are 'leaky' or not properly attached to the heat sink.
Posted on Sep 26, 2008
Unfortunately, most people look to unlock the clarifier in radio's it is locked in.
From what I understand it is possible to lock it in that radio, however I do not know it because I usually unlock it in my radio's.
I also did a search, and asked a few people I know who are also very good with radio's and they do not know either. The only thing I found was this, and you have to pay this shop to do it.
Posted on Oct 03, 2009
Not if the power output from radio to amp is set correct and the jumper for coax is correct length and there is absolute perfect match between them and the antenna used. Afterthought: also the amp better be connected to something big enough to power it.
Posted on Apr 29, 2012
Tips for a great answer:
Mar 23, 2014 | Cobra Radio Communications
Mar 23, 2014 | Cobra 200 GTL DX 4-Channels Base CB Radio
Oct 17, 2011 | Cobra 148 GTL 120-Channels Base CB Radio
Jan 18, 2011 | Cobra 200 GTL DX 4-Channels Base CB Radio
Aug 31, 2010 | Cobra 148 GTL 120-Channels Base CB Radio
Feb 02, 2009 | Cobra 200 GTL DX 4-Channels Base CB Radio
Jun 23, 2008 | Cobra 200 GTL DX 4-Channels Base CB Radio
Feb 13, 2008 | Cobra 200 GTL DX 4-Channels Base CB Radio
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