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

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  #17  
Old 01-11-2011, 10:22 PM
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Originally Posted by Robb View Post
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 . . .
Hey Robb,

There's a guy, Al / Art in this area running a 577 on a new 2970DX and he does sound really good...
I've wondered if it's the same element & audio amplification circuit sans echo as the 2018.
I have to believe it's the condenser element that's giving it such a smooth 'studio sound' while it still retains some crispness in the highs for added clarity without sounding harsh.

Do you know if they spec & sound the same without effects?

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  #18  
Old 01-11-2011, 10:30 PM
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Originally Posted by CDX-007 View Post

Do you know if they spec & sound the same without effects?
I've owned and used both. I think so . . .
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BASE: Kenwood TS-2000, GAP Titan DX, Diamond X50A, Sirio SY27-4, and IMAX 2000.
MOBILE: Galaxy DX99V w/RF Limited CR-577 mic, Sirio Z-180. Yaesu FT-8800R & Diamond NR-770.

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  #19  
Old 01-11-2011, 11:32 PM
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Actually I just looked it up and the 577 is a ceramic element and I nelieve the 2018 Extreme is a condenser. I'n not certain about the 2018 having a condenser but I have an older version (with silly blue LEDs which illuminate when keyed, I had to cut one lead on each of them to shut them off) which looks identical except it's clear, and it has a condenser element and sounds rich on SSB.

A where the guy even takes it apart in his review mentions the boards are different between the 577 & the 2018.

I love the 2018 my friend Terry uses on his Cobra, when he turns off the damn echo it sounds quite a bit richer than Al's does with the 577.

The 2018 just seems to have that smooth, rich, crisp condenser sound.

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Old 01-12-2011, 01:23 PM
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Originally Posted by tecnicoloco View Post
You might need this too
LOL

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  #21  
Old 01-15-2011, 06:22 AM
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I'll check out the RF Limited CR-577. Thanks for the suggestion. Right now I'm using a stock mic. Works, but not great. As for the base I have the MXL V67. I put everything together now all I have to do is get it hooked up the the base radio. I'm thinking of using a PTT switch mounted on the mic stand.

Terry

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  #22  
Old 03-13-2012, 11:49 AM
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ok robb or any other audio geek out there i have a ranger 6900-25 10 meter 4 pin mic,i have a heil handy mic,with a 4 pin xlr pluging into the mic,so whats the wiring to the 4 pin from the heil 4 pin xlr by pin and color anyone know thanks jon..

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  #23  
Old 03-13-2012, 12:17 PM
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Originally Posted by skullman64 View Post
ok robb or any other audio geek out there i have a ranger 6900-25 10 meter 4 pin mic,i have a heil handy mic,with a 4 pin xlr pluging into the mic,so whats the wiring to the 4 pin from the heil 4 pin xlr by pin and color anyone know thanks jon..
Hey Jon/KW-35!
Well, that Ranger radio of yours uses the same wiring as a Cobra, Galaxy, Connex, Uniden, SuperStar, and Magnum. Dunno about the 4 pin Heil mic wiring. But I'll bet that there is a wiring diagram of it around somewhere on the internet. Never used a Heil in a mobile; but I can tell you that I prefer the CR-577 over every mobile mic I've had, heard, and used myself.

Brian/World Radio 264 uses a Heil 5(?) mic in his mobile.
Can't say that I was impressed with its performance.

I would give Bob Heil a call and see if he can email you the wiring diagram/schematic for that mic. Just need to know where the mic audio wire is, the ground wire, and the PTT. The mic's impedance should be OK too . . .
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BASE: Kenwood TS-2000, GAP Titan DX, Diamond X50A, Sirio SY27-4, and IMAX 2000.
MOBILE: Galaxy DX99V w/RF Limited CR-577 mic, Sirio Z-180. Yaesu FT-8800R & Diamond NR-770.

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  #24  
Old 11-23-2013, 07:37 AM
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Quote:
Originally Posted by Captain Kilowatt View Post
This is all you need for a preamp Robb.

http://www.rdlnet.com/pdf/Data_Sheets/stm-1.pdf

or this http://www.rdlnet.com/pdf/Data_Sheets/stm-2.pdf


Radio Design Labs has GREAT audio products but they come at a price. What kind of price? Well lets just say that the broadcast industry uses them so ..................

I have a handfull of their STA-1 amps and a pair of STM-2 microphone preamps as well as a pair of older Altec Lansing mike preamps that I want to make use of in a future project. I want to build an interface box that will accept various mikes and feed various radios each of which is isolated from the other. That might get done this winter I don't know but hopefully it will get somewhat completed. Not really looking for HiFi audio but just decent quality audio.
BTW I don't know too much about the Jensen transformers you speak of. I use Hammond 800 series especially the 804, 812, 842, and the 850G series. Thier frequency responce is perfect and no ringing even when run up to their power limit, which nobody would ever want to do anyway in a microphone preamp application. They are meant to handle up to +30 dBm.
The speech processor from CBCINTL has HI-Z and LO-Z inputs. Couldn't that take the place of the preamps you and ROBB suggested?

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