Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old February 8th 07, 11:37 PM posted to rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Feb 2007
Posts: 4
Default Cobra 148GTL for 10 METER

I have an original Cobra 148GTL CB Radio. I know that i can modify it
to operate in the 10Meter band by switching the crystal to a
11.6908MHz crystal.

is anybody familiar with this mod? If so, how do i determine what
frequency each channel will be at? will i need to purchase a freq.
countert o determine what freq. will go with what channel?

Also, will my 102: whip work with 10M, or rather will it give me a
close enough SWR to suffice, or will i need to purchase a new antenna?

Any information or assistance would be greatly appreciated.

Eddie



  #2   Report Post  
Old February 8th 07, 11:58 PM posted to rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 162
Default Cobra 148GTL for 10 METER

Not sure of the mixing scheme of the cobra, so I won't comment on that
part of your question. Since the 10M band is higher in frequency than
CB, shortening the 102" whip experimentally should get your SWR
down...but you will need an SWR bridge to check that (or an antenna
analyzer such as the MFJ 259 or similar).

Scott


john james wrote:

I have an original Cobra 148GTL CB Radio. I know that i can modify it
to operate in the 10Meter band by switching the crystal to a
11.6908MHz crystal.

is anybody familiar with this mod? If so, how do i determine what
frequency each channel will be at? will i need to purchase a freq.
countert o determine what freq. will go with what channel?

Also, will my 102: whip work with 10M, or rather will it give me a
close enough SWR to suffice, or will i need to purchase a new antenna?

Any information or assistance would be greatly appreciated.

Eddie



  #3   Report Post  
Old February 9th 07, 12:35 AM posted to rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Feb 2007
Posts: 4
Default Cobra 148GTL for 10 METER

Hmm.. ok .. *IF* I remeber correctly, CB SWR meters are good for up to
30MHZ. so I can use the one I already own, correct?

Eddie


On Thu, 08 Feb 2007 22:58:06 +0000, Scott
wrote:

Not sure of the mixing scheme of the cobra, so I won't comment on that
part of your question. Since the 10M band is higher in frequency than
CB, shortening the 102" whip experimentally should get your SWR
down...but you will need an SWR bridge to check that (or an antenna
analyzer such as the MFJ 259 or similar).

Scott


john james wrote:

I have an original Cobra 148GTL CB Radio. I know that i can modify it
to operate in the 10Meter band by switching the crystal to a
11.6908MHz crystal.

is anybody familiar with this mod? If so, how do i determine what
frequency each channel will be at? will i need to purchase a freq.
countert o determine what freq. will go with what channel?

Also, will my 102: whip work with 10M, or rather will it give me a
close enough SWR to suffice, or will i need to purchase a new antenna?

Any information or assistance would be greatly appreciated.

Eddie




  #4   Report Post  
Old February 9th 07, 02:56 AM posted to rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Aug 2006
Posts: 106
Default Cobra 148GTL for 10 METER

Should work fine

john james wrote:

Hmm.. ok .. *IF* I remeber correctly, CB SWR meters are good for up to
30MHZ. so I can use the one I already own, correct?

Eddie


On Thu, 08 Feb 2007 22:58:06 +0000, Scott
wrote:



Not sure of the mixing scheme of the cobra, so I won't comment on that
part of your question. Since the 10M band is higher in frequency than
CB, shortening the 102" whip experimentally should get your SWR
down...but you will need an SWR bridge to check that (or an antenna
analyzer such as the MFJ 259 or similar).

Scott


john james wrote:



I have an original Cobra 148GTL CB Radio. I know that i can modify it
to operate in the 10Meter band by switching the crystal to a
11.6908MHz crystal.

is anybody familiar with this mod? If so, how do i determine what
frequency each channel will be at? will i need to purchase a freq.
countert o determine what freq. will go with what channel?

Also, will my 102: whip work with 10M, or rather will it give me a
close enough SWR to suffice, or will i need to purchase a new antenna?

Any information or assistance would be greatly appreciated.

Eddie









--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P



  #5   Report Post  
Old February 10th 07, 01:27 PM posted to rec.radio.amateur.homebrew
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 162
Default Cobra 148GTL for 10 METER

Yes, no problem at all!

Scott


john james wrote:

Hmm.. ok .. *IF* I remeber correctly, CB SWR meters are good for up to
30MHZ. so I can use the one I already own, correct?

Eddie


On Thu, 08 Feb 2007 22:58:06 +0000, Scott
wrote:


Not sure of the mixing scheme of the cobra, so I won't comment on that
part of your question. Since the 10M band is higher in frequency than
CB, shortening the 102" whip experimentally should get your SWR
down...but you will need an SWR bridge to check that (or an antenna
analyzer such as the MFJ 259 or similar).

Scott


john james wrote:


I have an original Cobra 148GTL CB Radio. I know that i can modify it
to operate in the 10Meter band by switching the crystal to a
11.6908MHz crystal.

is anybody familiar with this mod? If so, how do i determine what
frequency each channel will be at? will i need to purchase a freq.
countert o determine what freq. will go with what channel?

Also, will my 102: whip work with 10M, or rather will it give me a
close enough SWR to suffice, or will i need to purchase a new antenna?

Any information or assistance would be greatly appreciated.

Eddie





Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
FA: Cobra 148GTL SSB Mobile CB radio, needs repair Joe Swap 0 January 21st 05 06:35 AM
Cobra 142 GTL and 148GTL moi Scanner 1 December 9th 04 05:28 AM
f/s cobra 148gtl Jerry Scanner 0 November 9th 04 09:41 PM
Cobra 148GTL Meter dosen't work properly Kodiak CB 3 August 22nd 04 07:42 AM
SWR meter kaput? Thomas Antenna 5 August 13th 04 06:44 PM


All times are GMT +1. The time now is 06:12 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017