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Greeting’s to all Radio Heads

I have a few questions please. I recently bought a used Cobra 29 LTD Classic CB. I liked that classic look, no bells, no whistles, and no changing colors.

1.    DYNAMIKE – I don’t get this. If I understand EBay ads for higher end Cobra external speaker’s ,500 I think; that have “Talkback” feature included; this will enable talkback without an internal board? I have a 300 series now that I bought to use with a Cobra 18.

2.    RF GAIN – Sort of a boost? Crank it up and things get louder including hiss and static. Used to pull in weaker signals?

3.    DELTA TUNE – hmm? Fine tuning maybe? Don’t see that it does much so far.

The Cobra manual I looked at online doesn’t explain these things too well.  Any insight would be appreciated.

Observations:

Truck drivers are not too keen on conversing with the general public. They are often the only ones on the radio though. I can ask for a radio check over and over and just get silence.  If I hand the mike to the wife they perk right up. “She sounds cute” “Where’s she at?” That female voice I guess. I am left wondering if my radio is working, ha.

I miss the scanning feature when using the 29 Classic. Can this be added? I bet that dude in Arizona that builds starship CB’s could do it huh?

Those people on 6 are something else.

I read this forum often and regularly, thanks for the info.