CP-1 Top Gun Compressor: Scam or Science?

[cbradiomagazine.com]

In my experience in the Galaxy radios I tried it in (959/979) it didn't really make any measurable difference. Honestly I wouldn't bother with them again. In certain radios with certain circuits set up in a certain manner I'm sure they can serve a purpose but in most cases I don't think the time/money benefit for most people is going to provide the results they are seeking.

I think part of the problem is that the way these are advertised people are expecting big things out of them (example of the difference between a cheap stock microphone and adding a D104) but in reality the job it performs (or is advertised to perform) is to prevent the squaring of the waveform and provide leveling of the audio so that the results are going to be much less distinct than one might expect.

 

[AudioShockwav]

In my experience in the Galaxy radios I tried it in (959/979) it didn't really make any measurable difference. Honestly I wouldn't bother with them again. In certain radios with certain circuits set up in a certain manner I'm sure they can serve a purpose but in most cases I don't think the time/money benefit for most people is going to provide the results they are seeking.

I put one in a RCI 6900F25 and after testing for a few days, I removed it.
I did not like how the Audio sounded.

73
Jeff

 

[Lil'Yeshua]

My 959 sounds loud and marginally decent as long as it doesn't get turned up over 100% modulation. My best sounding radio is my DTB tuned CRE-8900. There again,I don't think the 959 needs any help in the modulation department.

 

[phantom309]

I have this mod done in my new galaxy 99v2, I don't want it as it's been giving me lots of audio problems.

How do I remove it? Or is best to have a shop remove it. I had bells cb install it when I bought the radio.

 

[undertaker]

Have a shop remove it. I had mine done at Bobs CB and it works perfectly...

 

[phantom309]

Have a shop remove it. I had mine done at Bobs CB and it works perfectly...

Ok thank you

 

[9C1Driver]

I have this mod done in my new galaxy 99v2, I don't want it as it's been giving me lots of audio problems.

How do I remove it? Or is best to have a shop remove it. I had bells cb install it when I bought the radio.

Some shops understand how to and can properly tune a radio with this, some cannot. Why this is I do not know but Bob's cb has consistantly got it right as does the radio shop in CA.

Did Bell's clip anything? Are you running a power mic? Do you have the mic gain cranked? You might have to mess with different mics and settings to get it dialed in. That or ship the radio off and have it removed and re-tuned.

 

[phantom309]

To my knowledge nothing was clipped, no power Mic. I use either an old rk 56 or new ranger sta198.

Mic gain is normally 3/4 to wide open depending on the mic being used.

Associated problems have been a constant buzz in the out going signal if I'm using an amp, ts 350 ts 500, or sweet sixteen, makes no difference, turn the amp off, the buzz or humm goes away.

The modulation light comes on even when the mic is in the holder not being used.

I have concerns about the mod causing

 

[Shadetree Mechanic]

Is anyone currently using a cp-1? Thinking about putting one in my newly acquired Galaxy DX94HP.

 

[Lomchivok]

I've got one of the oldies SP1a processor from clear channel I use in my old school President Lincoln...MRF 455...Works great.

 

[gcnengineer]

Hmmm, I wonder if that's WHY they have NOW incorporated the resistor?

Good to know..... THANKS!

100,000 OHM resister would drop the signal 40db. Basically it takes a line level signal down to mic. So yeah, the resistor makes the difference.

 

[Onelasttime]

Sorry to bring this thread back to life. A lot of very basic and key info is missing about this device.

I am very familar with the SP1-a from decades long ago. It is a huge shielded box the CP-1 is smaller than a USA postage stamp about 1/2 as big and not at all shielded.

So is this device only doing compression and very mild at that? I can not imagine there is space in the device for anything sophisticated so no filtering, notching, no real shapeing or delay or downward expasion etc....It must just be clipping and amplifing?

It is so tiny, cheap and always on. I once long ago say that Less installed it and a switched SP1-a into a base radio and the results seemed impressive.

When people say they did not like it they never elaberate as to what exactly they did not like about it. The what is the most important part good or bad.

Both the MD-1 and the CP-1 are grossly under talked about. Love it or hate it we should have a ton more information on it on this site.

 

[Onelasttime]

Do keep in mind I am not trying to insult anyone! I am trying to get people to actualy put in some effort and respond like they would for less covered mod's! It is pathetic how little has been writen about this cheap, widely available modification offered by so many.

 

[Onelasttime]

I put one in a RCI 6900F25 and after testing for a few days, I removed it.
I did not like how the Audio sounded.

73
Jeff

Yes but what did you not like. I to have a radio from John Mahoney a President Lincoln. I got a SP1-a from himn but did not have him install it in that radio. So just saying you did not like it is rather weak statement from someone with your experince. You might as well say "I did not like a boot shoved up my rear."! It is lacking so much information as to be the opposite of helpful. Not a slight on you either just want more!

 

[AudioShockwav]

It was not a SP-1, it was the stop gun model and listening to it from the base sounded overwhelming over compresed too me.
I did not like the sound and removed it.
Not sure what else you want to hear