| Author |
Message |
    
Keithinatlanta
Advanced Member
Username: Keithinatlanta
Post Number: 608
Registered: 3-2003
| | Posted on Friday, June 10, 2005 - 4:36 pm: | 
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My Uniden Grant has the 5 pin mike. So does the Cobra 148. Both are forty channel cb with am/ssb. But if you look at most other forty channel am/ssb brands, they all use four pin mikes. Anyone know why? What is purpose of fifth pin I guess is the ?.
Thanks.
Keith in Atlanta |
Knottyboy
New member
Username: Knottyboy
Post Number: 9
Registered: 10-2004
| | Posted on Friday, June 10, 2005 - 5:59 pm: |
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Don't know. My kenwood ts 140 has about 8 pin mic |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 377
Registered: 6-2004
| | Posted on Friday, June 10, 2005 - 9:35 pm: |
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It's a separate ground for the microphone element and TX/RX switches. Most radios combine the ground for the microphone and the TX/RX in the microphone cable. It's better to have the microphone ground separate so there is no possibility of the TX/RX circuitry causing noise in the audio, but most of the time it doesn't matter.
Lots of people change the 5 pin jack to a 4 pin jack and wire it so they can use the same microphone on multiple radios. This was a big deal when the Cobra 2000 first came out. |
Yankee
Advanced Member
Username: Yankee
Post Number: 651
Registered: 7-2003
| | Posted on Friday, June 10, 2005 - 10:43 pm: |
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I have the 4 to 5 pin adapter for uniden and most of my microphones are wired 4 pin uniden so they will work on a wide range of radios, I have several 4 pin and only two five pin radios. But for collector value I have left my 5 pin radios as is. The Cobra 2000 GTL is one radio I would never think of changing the plug on, as it would cut back on the value of the radio.
Carl CEF-357 |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 378
Registered: 6-2004
| | Posted on Saturday, June 11, 2005 - 7:05 am: |
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Yankee - It's pretty simple to modify the microphone jack in the Cobra 2000 without making any permanent changes.
Loosen the lock nut - back out the 5 pin jack - solder a 4 pin jack in parallel to the solder side of the 5 pin jack's circuit board with 4 fairly stiff 2" insulated wires - put the 4 pin jack in the hole - and tighten the lock nut. After you test it for function and are satisfied that it works you may want to wrap the 5 pin jack and it's board in electrical tape to prevent any shorts when you put the bottom cover back on the radio. |
Yankee
Advanced Member
Username: Yankee
Post Number: 652
Registered: 7-2003
| | Posted on Saturday, June 11, 2005 - 12:14 pm: |
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Hollowpoint: , I've seen a couple of 2000s done up that way and put them back to original for friends that wanted them to look correct. Members of the International Cobra 2000-GTL Club want everything original.
My own personal 2000 I had when I was a member of the group had all kinds of junk added to it when I bought it three months old and put it back to stock. It was a repo that was bought on credit, but the owner was 2 months behind and still had the box, manuals and packageing. I got lucky all the holes for echo, talk-back and 3 noise toys were on the bottom cover, and I located a donor cover from another Cobra dealer 50 miles away, it was free, but I made the the 100 mile round trip. I was lucky the mic. jack hadn't been changed to 4 pin.
Carl CEF-357 |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 379
Registered: 6-2004
| | Posted on Saturday, June 11, 2005 - 2:47 pm: |
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Cool - I didn't realize there were folks who didn't want any kind of modification at all to their Cobra 2000. Heck, I didn't know there were any that weren't modified!
If I owned a Cobra 2000 in really nice shape I wouldn't have a problem with this modification because it makes it possible to share microphones between radios, it can easily be reversed, and it looks better than an adapter cable or box. |
Yankee
Advanced Member
Username: Yankee
Post Number: 656
Registered: 7-2003
| | Posted on Saturday, June 11, 2005 - 4:56 pm: |
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 , Didn't say no modifications. Many of them had channel mods done and many other mods, But from looking at the radio, they looked new out of the box with no mods showing. The changing of the mic. jack would have been a showing mod.
Club rules stated this, that nothing could be showing. Also no roger beeps, echo, noise toys or voice changers. I can only guess that there are still many of the club radios out there that are total out of the box stock. I believe that the club has disbanded, as I've not heard from any of the members for about ten years now. Most members were in their 50s, 60s and 70s, and I'm 67 years old and it's possible that many of the members have since passed away.
Carl CEF-357 |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 383
Registered: 6-2004
| | Posted on Saturday, June 11, 2005 - 7:28 pm: |
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Interesting club! Most are concerned with the performance of the radio rather than how it looked. In doing channel mods without it showing you'd have to lose some function of the radio for each switch. That's not acceptable for someone who's serious about radioing. Most of the folks I know add functions to the radio to make it better to use - not removing them. I have heard of folks using the external speaker to house modification controls and run the cable through one of the existing holes on the back of the radio so it could be put back to stock appearance at will.
Now I want to get a Cobra 2000 just to play with! |
Yankee
Advanced Member
Username: Yankee
Post Number: 657
Registered: 7-2003
| | Posted on Saturday, June 11, 2005 - 9:38 pm: |
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Good Cobra 2000 GTLs are getting very hard to find in like new out of the box condition. The last unmolested one I saw was about seven years ago when I lived in Athens Georgia. A-1 condition not a scratch or ware mark anywhere. Two speakers and sold at $600.00. Just the speakers alone demand over $100.00. I know that's a lot of money for a CB radio, just depends on how bad someone wants a good like new 2000 GTL. Mine had two speakers and I had no problem asking and getting $475.00 five years ago. The one I had is now in an estate, my close friend who bought it from me passed away earlier this year. Just a year older than myself.
Carl CEF-357 |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 386
Registered: 6-2004
| | Posted on Saturday, June 11, 2005 - 10:44 pm: |
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I'd settle for a beater that worked for a reasonable price - just to have fun playing around with it. |
