FW: wish to combine VHF rf tx signals into one antenna

[William Fenn]

Sandy,

But how do repeaters Transmit and Receive on the same band at the same time.

Yes, the TX and TX frequencies are 600 Khz apart and this helps a little but
the secret is a set of tin cans called a diplexer with the cans on the
receiver set to notch out the transmitter frequency.  


-----Original Message-----
From: tacos-bounces+bfenn=cox.net at amrad.org
[mailto:tacos-bounces+bfenn=cox.net at amrad.org] On Behalf Of Nan and Sandy
Sanders
Sent: Wednesday, May 29, 2013 4:29 PM
To: tacos at amrad.org
Subject: Re: wish to combine VHF rf tx signals into one antenna

You can combine by band. 1 6M, 1 2M and 1 70CM radio into your triple 
band antenna. Other radios can be connected to other antennas 1 per 
band. However......... as a practical matter you will only be able to 
use one radio per band at a time because while you are transmitting 
any radios receiving on the same band will be desensitized and will 
hear only very strong signals if any signal at all. If you are at 
Tacos Sat we can discuss this a bit more.
      Sandy
      WB5MMB


At 03:13 PM 5/29/2013, you wrote:
>Hi, this might be odd. At K3GWU, as we catalog all donated 
>equipment, I have (now) several VHF radios. Some are portable 
>(1-5W), others fixed, low power (10W), medium power (30W), high power
(>60W)
>
>Is there a practical way to combine these into one antenna? or 
>should I use different antennas?
>
>I am seeking to minimize cabling from 3rd floor to rooftop (+2 
>floors), and to allow the station to be constantly in service with 
>voice to any repeater network in line of sight with Foggy Bottom, 
>and some experimental support in VHF band with digital modes.
>
>Ideas would be appreciated. I noticed the availability of diplexers, 
>but they are not usually VHF1, VHF2 VHF3 > common outputs.
>
>I do have a V2000A diamond triple band antenna (6M/2M/70CM) and a 
>separate KA2ZEV 2M antenna now that I could use....
>
>73 de N3RDX
>_______________________________________________
>Tacos mailing list
>Tacos at amrad.org
>https://amrad.org/mailman/listinfo/tacos

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