Paul, Knowing how cheap Hams can be, I have to wonder how likely it is that a Ham would have paid to have such units factory-built for the 70cm band- probably several thousand dollars. Such devices are built to order for specific frequencies, and it is likely that some expensive rework will be needed to move them to new frequencies. However, let's be optimistic and concentrate on the technical issues.
How many TX frequencies do you want to combine, and how far apart is each from its adjacent frequency? How much power does each transmitter have? Are there other transmitters at the site, and if so, what are their frequencies and power levels? Do you already have ferrite isolators and harmonic filters for each TX frequency? For the RX multicoupler, how many frequencies do you want to combine, and what is the spread? How close are other in-band transmitter frequencies? Does each receiver have an effective preselector front-end, like Micor and Mastr II radios? Since you're in the LA area, I suspect that your site is shared with dozens of other radio services. It is difficult enough to set up a single repeater pair at a densely-populated site, and setting up a combiner and multicoupler may be a significant challenge. One option that might be worthwhile is to piggy-back on an existing transmitter combiner and/or an existing receive multicoupler. It is more likely that you would be allowed to share a receive multicoupler, since transmitter combiners have components that are frequency-specific and very expensive. It can't hurt to ask. 73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Metzger Sent: Sunday, October 12, 2008 8:21 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] UHF TX Combiner & RX Multi-Coupler Wanted Hello all, I'm in need of a transmit combiner and receive mutli-coupler for the UHF Ham Bands. I'm located within the Los Angeles area and am not interested in buying new (you know us hams). I would like it to be a real factory built unit (not pieced together). Please e-mail me direct at [EMAIL PROTECTED] <mailto:paulmetzger%40fastmail.net> Thanks ! Paul Metzger
