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Great Mic Sound for your CB or Export Radio-part 4

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  #9  
Old 12-14-2010, 02:57 PM
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Are you using a linear amp?
Seems that it might be stray RF that is getting into some of your cables. I'm not sure that your wiriing is correct; but I think it is. I'm pretty sure you cannot get talkback in your radio by manipulating the mic wires. I would make my own 1/4 inch jack cables out of high quality cables that are RF approved...

If you have any ferrite clip-on beads, I would put them on the poorer cables and see if it doesn't change things. This may be an indicator of an RF leakage problem. A linear amp will only compound this condition - IMO.

Maybe someone else may know about this talkback dilemma.
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Old 12-14-2010, 08:15 PM
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I get the talkback with or without the linear, even on my friendís mic tester.
I think it must be something I have wired wrong. I really donít think it has anything to do with stray RF since it does it on a mic tester where there is no RF. Maybe itís time to take this to a good radio tech for review. I certainly donít have the expertise to sort this out.

Malcontent

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Old 12-14-2010, 08:58 PM
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Quote:
Originally Posted by Robb View Post
This will be needed to use a pre-made footswitch or handswitch from Heil or MFJ.
This is incidental and surely well know, but you can make a PTT out of just about anything. I made this one with a 2 cell AA flashlight, 3 miniature momentaries and some aluminum flashing. It's hooked to a mic and 2 different amps.


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Old 12-14-2010, 09:15 PM
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You might need this too
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Kenwood TS-120S,MC-50 Mic,Yaesu FP-700 PS,Antron 99 W/GP Kit at 20Ft.,4 Elem Sirio Optimized for 27.555 Mhz. RP789 Design at 12 Ft,MFJ 949 Tuner.

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Old 12-29-2010, 01:48 PM
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Very good info! I will be following your suggestions ASAP. Now...what about the mobiles!

Terry

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Old 01-05-2011, 08:14 PM
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Very good info! I will be following your suggestions ASAP. Now...what about the mobiles!

Terry
Buy an astatic 575-m6 if you can find one,save you hundreds of dollars on all that studio shit and sound every bit as good if not better on almost any radio. it won't flatter the ego as much but will sound just dandy.
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Old 01-11-2011, 08:05 PM
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I've been recently amazed by the sound quality of the RF Limited 2018 Extreme, when the effects are set to <OFF> of course.

I have a 575 M6 and as good as it is, I like the sound of the 2018 better, probably due to it's condenser element.
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Old 01-11-2011, 10:12 PM
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Quote:
Originally Posted by CM-4441 View Post
Very good info! I will be following your suggestions ASAP. Now...what about the mobiles!

Terry
Using pro mics in a mobile can be done. I just wouldn't do it myself. Too much ambient noise being amplified in a car! Better off using a decent mobile mic. The setup I've suggested is best suited for a base station with a quiet background.

I use a RF Limited CR-577 mic in my mobile. Works better than my D-104 Minuteman II. The RF Limited Xtreme 2018 mic is similar too. Verrry clean audio . . .
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