VHF/800 & UHF Diplexer

[KG5HHS]

Hello Everyone,
I am trying to find a diplexer solution to upgrade my main radio. Currently I have a VHF Motorola XTL5000 (Main Radio) and a UHF Motorola XPR5550 with coax going to a VHF/UHF diplexer feeding a 1/4wave dual band antenna. I have upgraded to a VHF/700/800MHz Harris XG-100M. With the XG-100m sharing the same coax connection for VHF & up, is anyone familiar with a way to properly separate the bands without having to install another antenna?

 

[buddrousa]

Commerical Equipment that works Public Service 150 450 700-800 is very high and the Ham Stuff does not work in the Public Service 150 450 700-800 Band.

 

[kf8yk]

To keep a single antenna for the Harris (VHF & 7/800) and the UHF XPR this might work:

Install a tri band antenna like the Larsen or E/M Wave.

Break out all the bands with a triplexer like the Motorola triplexer: High power or Low power or Panorama Antenna triplexer: TPX

Use your existing VHF/UHF duplexer backwards to split the Harris antenna port into two. Connect the duplexer VHF port to the triplexer VHF port, connect the duplexer UHF to the 7/800 port on the triplexer. Remember on most of these two port duplexers the UHF port is just a high pass filter with about a 300 MHz cutoff, they typically pass 7/800 almost as well as UHF. Sweep it to be sure your duplexer will work.

Connect the triplexer UHF port to the XPR.

 

[prcguy]

I also run a Harris XG-100M and agree on using a triband commercial antenna and there are many to choose from. I've been testing the cheapest of the bunch for the last year and I'm impressed, the performance and weather wear is on par with more expensive types like the Larsen tri band but this Tram only costs about $30.

Tri Band Antenna UHF 440-520 VHF 150-170 800-960 MHz NMO For Mobile Radio 8079 | eBay

Tri Band VHF 150-170MHz, UHF 440-520MHz, 800-960MHz Pre-Tuned NMO Antenna. 2.14 dBi gain @ 150 MHz, 4.11 dBi gain @450 MHz, 4.12 dBi gain @ 915 MHz.

www.ebay.com

Or here is a freakishly good deal from Canada eh? A $200 retail PCTEL/Motorola multi band antenna for about $19 new surplus.

New Motorola All-Band Antenna AN000131A01 | eBay

Find many great new & used options and get the best deals for New Motorola All-Band Antenna AN000131A01 at the best online prices at eBay! Free shipping for many products!

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Too late for this one but I just bought another $200 retail Laird/Harris multi band for $20, the deals are out here.

Genuine Harris 12099-0330-01 Unity LMR Full Spectrum Antenna 1105 1507/09 Rev G for sale online | eBay

Find many great new & used options and get the best deals for Genuine Harris 12099-0330-01 Unity LMR Full Spectrum Antenna 1105 1507/09 Rev G at the best online prices at eBay! Free shipping for many products!

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[wwhitby]

I'm currently using an EM Wave EM-M43002 tri band antenna, and I'm very happy with it..

 

[kf8yk]

To keep a single antenna for the Harris (VHF & 7/800) and the UHF XPR this might work...

Here's a diagram of this setup:

 

[mmckenna]

Is installing a tri band antenna and a separate UHF antenna an option? Seems like that would be less epensive than those diplexers/triplexers.

 

[prcguy]

Is the Harris replacing any radio or will there be three radios? Either way I would install another mount and dedicate a multi band antenna to the harris then run a single band if just one old radio is used or run the dual band and duplexer to feed both mono band radios.