Yes - this is going on an 16ft boat trailer converted to a flatbed with a 38ft crank up tower mounted on a tilt base that I built. the tilt base, hydraulic system, and generator are towards the back of the trailer, with a 9ft x 5ft x 3.5ft cargo box system forward of the tilt base. The forward 5ft x 5ft x 3.5ft of the cargo section is split into 2 shelves for cargo, the rear 4ft is split with 2 18" deep shelves on each side, and a 65 gallon fuel tank for the generator in the middle. The bottom shelf on each side holds 10 each 100ah SLA batteries. The top left (drivers) side is power electronics (transfer switch, 3000W inverter, 140A battery charger, AC distribution panel, Primary 300A DC power Bus, and the high current DC breaker panel. The top right side is radio and computer gear to implement local area and point to point WiFi networks, APRS beacon with optional digipeater capability, WinLink Telpac and PacLink Postoffice capability, Voice Repeater, and eventually a 1.2hgz D-Star link. If the repeater ends up on VHF, then I might consider setting an ATV system on 440, since I won't be using 440 for anything else on the trailer. Call it the "ham shack on wheels" if you like :-)
I have asked for a UHF itinerant/backyard pair, been informed that I would be given a list of pairs to listen on to find one reasonably clear enough to set up on, and have been waiting over a week for said list. There is no specifically designated UHF "backyard" pair in this area, but there is one for VHF - 145.25/144.65, which I have been assured by the VHF coordinator that I can use. As stated earlier, I would LOVE to setup on UHF for this, but until I get coordination, I'm moving forward with the VHF at least far enough to get the 2 simplex rigs playing nicely, with a solid plan in place for adding the repeater should the UHF idea fall through. I'm almost tempted to set up and scan pairs where I don't have a repeater closer than 40 or 50 miles, just to get a jump on the UHF coordinator, but I don't have a spare 440 capable radio to use for a dedicated scanner for a week right now. _____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Wednesday, October 24, 2007 11:03 AM To: [email protected] Subject: RE: [Repeater-Builder] duplexer isolation and reciever noise budget John, If I'm reading this correctly, you're trying to do this all in a trailer - yes? Since you are operating "portable", does your coordinating body have an "Itinerant" UHF pair you can use for the repeater? If so, this might make your situation MUCH easier to engineer. Mark - N9WYS _____ From: [email protected] On Behalf Of John Barrett ---- snip ---- The key here is the height of the cans. if they are short enough (less than 30" total including tuning rod), I can do 2 banks, facing different sides of the trailer.. doubling the number of cans I can pack in. Only one of the cans I have so far exceeds that spec, and only by a little.. once its tuned it may be less than the 30" max, or I can trade it off with a shorter can on the other side to make up the difference. I would prefer to keep all the cans on one side if possible, but it is looking more and more like it will not be, so I'm willing to give up some space in the power electronics bay to make space for more cans.
