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Vdnovach
New member
Username: Vdnovach
Post Number: 9
Registered: 4-2007
| | Posted on Wednesday, October 31, 2007 - 2:13 pm: | 
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Does anyone make anything that will allow you to use your cb antenna for your car stereo as well?
The Vampyre's blood flows cold through the heart but warm against the embrace- V.D. Novach
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Tech858
Moderator
Username: Tech858
Post Number: 23
Registered: 10-2007
| | Posted on Wednesday, October 31, 2007 - 4:11 pm: |
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There used to be adaptors available for this purpose which was like a splitter box with tuning slugs and some other circuitry in it , I am sure these must still be out there somewhere as they are appearing on a certain auction site here in the UK and possibly with a phone call to COPPER ELECTRONICS you might find what you are looking for . 
Tech858/Jim
MM0TXO
CEF#858
HAM#230
CVC#116
Wavin' a hand at ya' fae Scotland 
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Hyperno_1979
Intermediate Member
Username: Hyperno_1979
Post Number: 473
Registered: 12-2005
| | Posted on Wednesday, October 31, 2007 - 4:46 pm: |
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There is one for sale here too Jim. Apparently it's a car radio antenna that has UHF cb capabilities as well. Might be worth a look for you hams that use 23cm? Like all these weird and wonderful things it's not real cheap....lol. Haven't seen anything like that to cover 27 mhz though.
CEFFFCEF
Bob
CEF703/CVC26
269 Hunter Valley
NOT allowed to hold a passport....
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Vdnovach
Junior Member
Username: Vdnovach
Post Number: 10
Registered: 4-2007
| | Posted on Thursday, November 01, 2007 - 12:19 am: |
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Ok so I need to look for "splitters" then?
The Vampyre's blood flows cold through the heart but warm against the embrace- V.D. Novach
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Tech237
Moderator
Username: Tech237
Post Number: 889
Registered: 4-2004
| | Posted on Thursday, November 01, 2007 - 1:07 pm: |
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I'd recommend against them - unless you build you own. Most commercial ones that I have had access to seemed to lossy to work properly.
Firstly at CB frequencies a car radio antenna is too short unless it has a fairly large lossy loading coil. Secondly there will also be a loss involved with the diplexor (aka splitter) and most commercial ones are made to a price not a quality - i.e the cheaper the diplexor the more loss it is liable to have.
Simon
Tech237
N7AUS
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Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2625
Registered: 9-2004
| | Posted on Thursday, November 01, 2007 - 10:31 pm: |
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the only way to do this, and still maintain some semblance of good CB performance, is with an antenna switch box.
those "splitters", and combo AM/FM/CB antennas and adapters are all junk.
the very idea makes them junk.
you need to buy an antenna switch.
then hook one coax cable from the CB antenna to the common connector of the switch, run one coax to the CB radio, and one coax with a motorola antenna adapter on the end to the stereo.
then you just flip the switch to the CB position when you want to use the CB.
no, you will not be able to use the antenna for both radios at the same time.
you can either do that, or buy a 3 foot peice of coax with the motorola plug on one end, and separate the shield from the center conductor to make a sort of "dipole".
run these wires up under the dash, and it should work pretty good.
if you live in the middle of nowhere, then you would be better off with the first idea.
hope this helps,
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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