Question about Cobra MR- F55 Base CB Radio
The cobra shows (9999999999s) in the display . that tell me its in default?
I found a promlem in the connecting cable and I have put that right!
Is there a way that I can reset the window ,so I can recieve data from the gps ??? Or have I done it a perminant mischief ?
I can manualy put in a lat long possition ,But as soon as I cut the power and turn on again ,it goes back to two rows of 9s.(back to default) Help!ha ha .
Thank Guys Regards Bill
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Posted on Jan 02, 2017
SOURCE: cobra 148 gtl new model
Hello bluzfan, Do you remember the old 40 channel CBs? they used basic A3A transmission (dual sideband single carrier)remember how you got crosstalk sometimes, if your power was too high? Then they went to 80 channel CBs (using a single side band as Lower Side Band (lsb) and the other as the upper side band (usb))? more crosstalk but they invented anl (automatic noise limiter)circuitry to compensate. Now you have the 120 channel CB which uses a form of side band multiplexing (20QAM) to generate 3 times more channel density 40 X 3 = 120. Here is my problem; Cobra should not have done this because you will have massive crosstalk and unaudible sounds because of the increase in channels but not an increase in initial (physical)bandwidth. I hate to tell you this but the only cure for the is to use it in 40 channel or 80 channel mode forget the 120 channel mode, or get a radio with better channel separation.
Posted on Oct 07, 2007
SOURCE: cobra 148 gtl
Open the radio up and find the L22 Can/Pot. It's the one with the wire soldered on top. With both fine and coarse Claifier/Voice Locks in the 12 O'Clock positions, confirm, then listen for someone that is on the correct frequency and turn this pot (small ferrite core inside) with a small plastic preferred screwdriver, until they sound clear. Do this for USB as well except, the Can/Pot is L59. Don't adjust the VR5 (transmit) unless you need to.
Posted on Dec 01, 2007
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 firstname.lastname@example.org. I look forward to hearing from you.
Mt. Vernon, TX
Posted on Feb 14, 2008
SOURCE: New radio
Assuming no hardware faults, start with the basics, on powering on the radio:
1. RG Gain max clockwise;
2. Ch 9/NOR to Normal;
3. Delta Tune to mid position;
4. CB/PA to CB;
5. Squelch to minimum counter clockwise;
6. Channel selector to desired channel.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
Posted on Jun 30, 2008
SOURCE: Cobra 29 Ltd
Appreciate the direct "Ask Me" again.
The initial posting would still hold true, best would be:
Good luck and kind regards. Thank you for using FixYa.
Posted on Sep 08, 2008
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