In general 800 maxtracs are good for 900 receivers however the tx components and the vco will not go easily to 900. If you pin the T/A vco on high rnage and program for 900 freq, as well as change the murata filters, they can generally tune the whole 900 band in 5khz deviation... We use them on many repeaters as the +_5khz gives elbowroom for off freq mobiles as many users do not have service monitors readily available... Tx deviations are generally limited to 12k5 bandwidth specs on 927.. but the receivers are left alone. They can be narrowed, but most are not yet until we need to get that close with pairs..
There are tons of 900 paging amps around which require no mods.. Purc 5000 Stations are almost free for the taking in some areas. The ACS controller handles 927 entries Doug KB8GVQ At 01:50 PM 10/27/2004, you wrote: >Very interesting... I have a Motorola Micor 800MHz-75w continous duty PA, >and a Motorola Nucleus paging PA (supposed) high power. >I never really thought about what to use them for, just stacked them in the >shack for a "future" project. > >I was actually thinking about 900-ATV (FM of course)... I also have a small >"Mitsi" brick that I managed to get going, good for about 20 watts before it >saturates. > >What would be entailed in converting a 800MHz Maxtrac to narrow-band FM(I >don't have the model number handy right now)... is it worth the effort? >Will the Maxtrac even do 2.5 kHz? One of those things I just haven't had >time to investigate. > >TIA... >73's >Mike Perryman >www.k5jmp.us > >-----Original Message----- >From: skipp025 [mailto:[EMAIL PROTECTED] >Sent: Wednesday, October 27, 2004 1:23 PM >To: [email protected] >Subject: [Repeater-Builder] Re: Radios for 900 mhz > > > > > > Doug Bade <[EMAIL PROTECTED]> wrote: > > No Amateur manufactured radio's, however at least > > 12-15 models of 900 and some 800 commercial can > > be readily moved.. > >Motorola (Micor, MSF, GTX, Purc & Darcom), EF Johnson >(Avenger & 900 Mhz version of the 8615 Series), GE MVP, >Repco (boards), Neutec (Ranger Series), MDS datapoint, >RCA (yes, they made an 800 radio, which was pretty easy >to convert) and a few others. > > > There are currently about 100 repeaters on 902/927 > > pairings in the US, most of which are less than 3 > > years old.. > >Actually, I'll bet there are a lot more 900 machines >around, just not posted. Some 900Mhz repeater people >don't post repeater locations to the public forums >because of problematic "ah" hams known to frequent the >more popular web repeater/radio groups. Some locations >are agile with our wonderful utility companies using >analog and spread spectrum meter reading devices. We >have to move them around to find a clean receiver slot. > > > there is a significant effort to modify and build, > > and plenty of parts available. It is definitely an > > interesting band. > >Early 900Mhz repeaters were on the air in the late >80's. We found the mobiles picket fence a lot more >than 445 operation. Similar to 1290 actually... > > > For those interested in 900 activity in this > > repeater/user category, one of the larger homes > > for data and users is [EMAIL PROTECTED] > > > > Most of the 900 repeater operators in the country > > lurk there, as well as most of the folks who > > have developed various mods, and lots of data > > archived in the what can and what cannot be done... > > Most Moto 900 commercial gear has some if not good > > to excellent potential in 902-928, > > with the proper mods... > >Good information... > > > There are only a few GE 900 commercial products > > that adapt well... > >The GE MVP 800 plays pretty well on 900 with reduced >power. Many of the 90 vintage sf bay area repeaters >were made with converted mvp radios. It was actually >pretty cheap to get on 900 with converted radios. > > > YMMV.. > > Doug > > KB8GVQ > > > >Cheers Doug > >73's >skipp > >www.radiowrench.com/sonic > > > > > > > > >Yahoo! Groups Links > > > > > > > > > > > > >Yahoo! Groups Links > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
