Duplexer will work too but probably will cost more than he's looking for and
will be a little more narrow banded I should think unless he's on different
bands with each radio.
----- Original Message -----
From: "Frederick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, December 19, 2007 7:01 PM
Subject: Re: multiple radios, one antenna
> Hi
> Yes, they do make such a device called a duplexer or malty plexer.
> Usually expensive but sometimes well worth the money. I used to own one
> but
> never used it in the shack. I am sure others on the list can tell you much
> more.
>
> God bless,
> Mark
> God loves you!
> My ham radio lists.
> http://lists.topica.com/lists/funhamradio.
> http://groups.google.com/group/funhamradio-list
> ----- Original Message -----
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, December 19, 2007 3:53 PM
> Subject: multiple radios, one antenna
>
>
>> here is a question for the list:
>> I want to have my main VHF/UHF transceiver hooked up to my single dual
>> bander, while at the same time using that same dual band antenna for
>> another
>> transceiver and a scanner at the same time.
>> I don't want to have to manually switch the antenna over to the different
>> radios via an antenna switch.
>> What i need is some sort of distribution device that will allow me to
>> transmit on either of the VHF and or UHF radios, without damaging either
>> the
>> other transceiver or the scanner. And then when there is no rf being
>> transmitted, to be able to have all 3 receive properly using the one
>> antenna.
>> My question is, is there such a device availible?
>> I know about distribution amplifiers for receive, but i don't know if you
>> can transmit through those, and i also need something that will prohibit
>> any
>> rf getting back into the other radios.
>> I know that any receiver that is on the same band will be desensatized as
>> soon as I transmit, but i am not concerned about that since if i were
>> using
>> a separate antenna, that would occur in the near field anyway.
>> I require such a device because i can only really have one good dual band
>> antenna at any height and i have several different rigs i want to be able
>> to
>> use to monitor and transmit on, as well as listen on the scanner.
>> I know that in multi-frequency systems, such as a public safety
>> organization, or even public transit, they often have multiple radios on
>> the
>> same band going at the same time for dispatch or communications purposes,
>> all using the same antenna....i suspect they use some sort of tuned
>> cavities
>> to prevent desensatization...
>> I need a little box that i can plug my antenna into, and plug 3 radios
>> into
>> the other side and not worry about my 50 watts of rf on VHF getting back
>> into the antenna jack of the other radios and blowing out the front ends.
>> any help is appreciated in finding a solution to my wishes.
>>
>> 73
>> Colin, V A6BKX
>>
>>
>>
>
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