How to internally increase modultion on cobra 19 dx 4

SOURCE: CB transmission

Hello 64driver,

Make sure the radio is grounded properly and that the SWR is around 1.2:1, 1.3:1 is good but try to get it to 1.2:1. Also take a power output reading while keying the mic. To do this with your power meter put it in-line with the CB and your antenna and key the mic you should get about 4 to 5 watts PEP. If this is the case your unit is putting out the proper power level, if not have the power amplifier checked by a qualified repair shop.

I hope this helps

Shuttle83

SOURCE: Cobra 29 Ltd

Hi,

Appreciate the direct "Ask Me" again.

The initial posting would still hold true, best would be:

• remove TR18;
• replace 2SC2069 with 2SC1969; and
  
• adjust L12, 13 & 14.

SOURCE: cobra 148 gtl dx manual

This is the Manual for the C148GTL

SOURCE: Cobra 19 DX IV out of frequency

I would definitely take it back for a re check. If the radio took a good bump perhaps it can cause it to drift off frequency. Turning the channel while holding his mic keyed does nothing but just throws a dead carrier. No value what soever. RF Gain is just to improve his reception by either lowering or raising the sensitivity of the receiver of the radio. Squelch is to silence the hissing sound you hear when no one is talking. Care must be taken to not to adjust too much or you wont hear anybody. It wont help his transmit audio at all. Recommend you get another Radio Check from someone else. He could be pulling your leg saying you don't sound good. Best regards and hope this helps some......................John.

SOURCE: tunring up a cobra 150 gtl/dx

Um... What?? This is hooked to a switch? CB radio by FCC regulations is only supposed to have a max of 4 watts total output. If you can flip it to 7 watts dead key, you are doing really good. It won't do much more then that. It sounds like its set up to run on a linear amplifier, which cannot have more then 3 watts dead key transmitting into it.

Dead key, and modulation are different. You may have a meter that only reads dead key, and won't see the modulation. This radio is probably swinging close to 15-20 watts. you need a meter that can read PEP, Peak envelope power. Cheap meters only read AVG, or average power, witch will only show your dead key.

7 watts dead key is really good for that radio.especially since stock only has 4 watts. you cannot get any higher then that without changing finals.

at 3 watt dead key, or 7 watt dead key, your modulation wattage is still swinging much higher.

Also, you will get more swing with a lower dead key any way, which is better if you want it to be loud.

Leave it alone. its probably set just right.