Question about Cobra 150 GTL DX Base CB Radio

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Cobra 150 gtl?

When on high power the modulation is very lou. outher then that the radio works very good

Posted by Anonymous on

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RV12 is the modulation adjust for the 150. Check with cbtricks.com for physical location.

Posted on Jul 30, 2008

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6ya6ya
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1 Answer

No variable powere or am modulation


the "am" regulator is shorted. 2sa743 2sa1012or equivilent. less than $5 part..

Feb 04, 2014 | Magnum DeltaForce CB Radio

1 Answer

Connex 3300hp big betty transmits fine on low power setting but when switched to high power hardly any modulation


well fellow truck driver here goes. When you take any radio back to a repair shop they are required by law to set it back to its original settings. I could fix it for you if you ever got to Massachusetts but you need it now so I would tell you this.Take it to a very good cb shop , tell them what went on and that you would like that big radio sound back. thats it.

Mar 16, 2013 | Radio Communications

1 Answer

No modulation when transmitting


No modulation could be a problem with your mic or the factory setting inside the radio. Radios are set at about 50 to 80% modulation from the factory. This is adjustable in most radios. Search mod adjustment on XXX radio and you should get info as to where the mod adjustment is located inside your radio. Turning it all the way up will not hurt it but it could cause some distortion if turned too high. Up is turning it counter clockwise.
Modulation is not shown on all built in "S" meters, just power. There are bench meters which show both power and modulation available for about $50 and up.

Feb 21, 2011 | Radio Communications

1 Answer

G959 mod meter will not work but modulation is 100% others rfine?


If its the meter on the radio don't worry about it they do go bad but it won't effect the radio. My shops in North Florida. And no I have no web site at this time.

Apr 27, 2010 | Galaxy Radios DX-959 40-Channels Base CB...

1 Answer

Freq counter starts rolling backwards to 24mhz and locksup entire


SOUNDS LIKE A COLD SOLDER JOINT OR A BAD COMPONNET WHEN IT WARMS UP THATS WHEN IT STARTS ..TAKE OFF THE COVER SO THAT YOU CAN SEE THE SOLDER SIDE OF THE BOARD PUT POWER TO THE RADIO AND WHEN IT WARMS UP AND SHUTS DOWN TAKE A LITTLE PIECE OF WOOD OR PLASTIC AND PROBE ALL THE SOLDER CONNECTIONS TO CHECK FOR A COLD SOLDER JOINT IT MAY BE GRAY IN COLOR MAY NOT.. SEE IF IT GOES ON AND OFF.. IF SO RESOLDER THAT SOLDER JOINT.......IF THIS DOES NOT WORK ....PICK UP SOME FREEZE SPRAY AND SPRAY IT ON THE COMPONNETS ON THE OUTHER SIDE OF THE BOARD THIS IS WHAT A SERVICE PLACE WILL DO IF THAT DOES NOT WORK NOW BRING IT TO A SERVICE AND LET THEM SCRATCH THERE HEAD GOOD LUCK

Feb 01, 2009 | Ranger VR-9000 Base CB Radio

1 Answer

Cobra 132 recieves good poor send


Poor send? Is your modulation ok?
The biggest hurdle for good coms is the antenna, placement and proper tuning will make or break your CB.
Check your SWR, if you can't check it then another way to get an idea is to use your power meter.
It will show more power when the SWR is high, check you high and low channels for increased deflection. High on channel 40 and low on channel one would mean antenna needs to be shorter and the opposite for channel one. A balanced reading or slightly lower reading in the midband channels would indicate antenna working near optimum.

Dec 06, 2008 | Cobra 29 LTD CB Radio

1 Answer

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.
Good Luck
Ed Meshechek ( Radio Man )
NC Electronics
PO Box 1696
414 6th St.
Mills, Wyoming
82644
307-266-4675
wyoed1@aol.com

Nov 24, 2008 | Cobra 29 LTD CB Radio

2 Answers

Super Star 3900 GHP


Can't help you there. It's most likely that you screwed the modulator up by extending the frequency range. I used to work for Galaxy and I know what happens to a radio when amateurs try to modify them (no offense). If you modify a high power radio such as your Super Star, you're bound to have modulation and SWR problems. In expert advice, never do amateur radio modifications to a high power radio. If you want a more versatile radio, get a Galaxy DX 2517 CB base station. The DX 2517 has PA/FM/AM/SSB/USB/LSB/CW modes, and bands A-F, and a frequency range from 25.615 to 29.205 MHz. The Galaxy DX 2517 has modifications that can be done right at the factory, they are optional however. The only thing I find annoying with the DX 2517 is that it's bulky, it leaves no room for any competition. When it was designed, the engineers left space saving out of the question.
Anyway, Good luck
and
Best Regards,
Gavin93

Aug 07, 2008 | Galaxy Radios DX- 88HL Base CB Radio

1 Answer

RADIO WORKS FOR FEW MIN THEN STOPS TURN OFF FOR 10 MIN WILL WORK AGAIN


SOUNDS LIKE A COLD SOLDER JOINT OR A BAD COMPONNET WHEN IT WARMS UP THATS WHEN IT STARTS ..TAKE OFF THE COVER SO THAT YOU CAN SEE THE SOLDER SIDE OF THE BOARD PUT POWER TO THE RADIO AND WHEN IT WARMS UP AND SHUTS DOWN TAKE A LITTLE PIECE OF WOOD OR PLASTIC AND PROBE ALL THE SOLDER CONNECTIONS TO CHECK FOR A COLD SOLDER JOINT IT MAY BE GRAY IN COLOR MAY NOT.. SEE IF IT GOES ON AND OFF.. IF SO RESOLDER THAT SOLDER JOINT.......IF THIS DOES NOT WORK ....PICK UP SOME FREEZE SPRAY AND SPRAY IT ON THE COMPONNETS ON THE OUTHER SIDE OF THE BOARD THIS IS WHAT A SERVICE PLACE WILL DO IF THAT DOES NOT WORK NOW BRING IT TO A SERVICE AND LET THEM SCRATCH THERE HEAD GOOD LUCK

Jul 09, 2008 | Ranger Communications RCI-6900F-25 CB...

1 Answer

Cobra 200gtl High Power Transmit problem??


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.

Jun 23, 2008 | Cobra 200 GTL DX 4-Channels Base CB Radio

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