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HAND HELD COM ANTENNA CONNECTION

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sales(at)6440autoparts.co
Guest

Posted: Tue Aug 29, 2006 11:40 am Post subject: HAND HELD COM ANTENNA CONNECTION

I was just looking at 

http://www.aeroelectric.com/articles/commtap/commtap.html and if I 

understand it correctly this will break the antenna connection from the in 

dash com (disabling it)and allow the hand help to use the antenna. I would 

prefer to be able to use both radio's at once if needed. I have read here on 

Aeroelectric that a "t" type bnc connector will cause the antenna to loose 

some of it's range. Is there a better way to use both radios at the same 

time ?



Randy

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brian-av(at)lloyd.com
Guest

Posted: Tue Aug 29, 2006 2:13 pm Post subject: HAND HELD COM ANTENNA CONNECTION

On Aug 29, 2006, at 12:40 PM, 6440 Auto Parts wrote:



 	  Quote: 	
		   

 <sales(at)6440autoparts.com>



     I was just looking at http://www.aeroelectric.com/articles/ 

 commtap/commtap.html and if I understand it correctly this will  

 break the antenna connection from the in dash com (disabling it)and  

 allow the hand help to use the antenna. I would prefer to be able  

 to use both radio's at once if needed. I have read here on  

 Aeroelectric that a "t" type bnc connector will cause the antenna  

 to loose some of it's range. Is there a better way to use both  

 radios at the same time ?


	


There is no good way to connect two radios that operate in the same  

band to the same antenna, i.e. you can't connect two comm radios to  

the same antenna. If you put in a 'T' connector to connect both  

radios to the same antenna, odds are very good that the first time  

you transmit on one radio you will destroy the other.



So the best answer is, "add another antenna."



If you want to connect a handheld radio to your regular comm antenna,  

bring the com antenna coax to a place you can readily reach (like  

just under the leading edge of the panel) and terminate it with a BNC  

female connector. Bring the coax from your comm radio to the same  

place terminated in a BNC male. Connect them together. If you need to  

plug your hand-held into the comm antenna because your main comm has  

failed, reach under the panel, disconnect the BNC male from the  

regular comm, and attach the antenna cable from your handheld to the  

now-free BNC female that goes to the antenna.



Brian Lloyd                         361 Catterline Way

brian HYPHEN av AT lloyd DOT com    Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

— Antoine de Saint-Exupéry

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FLYaDIVE(at)aol.com
Guest

Posted: Tue Aug 29, 2006 5:53 pm Post subject: HAND HELD COM ANTENNA CONNECTION

In a message dated 8/29/06 5:19:47 PM Eastern Daylight Time, 

sales(at)6440autoparts.com writes:



 	  Quote: 	
		        I was just looking at 

  http://www.aeroelectric.com/articles/commtap/commtap.html and if I 

  understand it correctly this will break the antenna connection from the in 

  dash com (disabling it)and allow the hand help to use the antenna. I would 

  prefer to be able to use both radio's at once if needed. I have read here 

on 
	


 	  Quote: 	
		   

  Aeroelectric that a "t" type bnc connector will cause the antenna to loose 

  some of it's range. Is there a better way to use both radios at the same 

  time ?

  

  Randy 

================================
	


Randy:



I hope someone got to you sooner than I on your question?

You CANNOT use a 'T' fitting to use both radios at the same time.

The HUGE problem in doing so is that when you TRANSMIT the output of one 

radio will go directly into the other radio and BLOWOUT that radio.  And since 

there is also a mismatch it could even do damage to the transmit radio,



The ONLY way I know of to use one antenna and two radios is to disconnect one 

radio from the antenna.  Which brings up a second problem.  When you 

disconnect the panel Com it is sitting without an antenna/load.  If you were to hit 

the transmit button on the stick you could blow the output circuit of the Com 

radio.  



Best way around this is to have two antennas.  Second best way is to shout 

off the panel Com radio when using the HH radio.



Barry

"Chop'd Liver"



"Show them the first time, correct them the second time, kick them the third 

time." 

Yamashiada

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bicyclop(at)pacbell.net
Guest

Posted: Tue Aug 29, 2006 8:49 pm Post subject: HAND HELD COM ANTENNA CONNECTION

There actually is a way to use two Com radios on one antenna. Bob Archer

sells an antenna switch that connects both radios while receiving and

disconnects the passive radio when either transmits. I think he can be

reached at:



bobsantennas(at)earthlink.net



Google him up and you'll find all kinds of interesting stuff.



Pax,



Ed Holyoke

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dsvs(at)comcast.net
Guest

Posted: Tue Aug 29, 2006 9:05 pm Post subject: HAND HELD COM ANTENNA CONNECTION

Ed,

Comant also sells the same thing.  Don



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