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800Mhz Public Safety & 900Mhz ham on one radio... Possib
Posted: Sat Apr 10, 2004 9:18 pm
by nmfire10
I know this is probably a major long shot but I figured if it is possible, someone here would know. Is there a such thing as a radio that will function properly (with or without modification) on both the 800Mhz conventional public safety channels and 900Mhz ham? What I want (however far fetched) is a radio to use on a 900Mhz ham repeater and monitor a few of the 800Mhz fire channels and I-Tac.
Is this possible or just not even worth concidering??
I never tried it?
Posted: Sun Apr 11, 2004 12:38 am
by Jim2121
I never tried it..but I've hexed the rss on some MTX9000 ..but I only used it for tx & rx on ham repeaters btw 902-927M..never thought about anything to listen too on 800Mhz... besides before the law passed in the 1994? where the cell band bacame blocked to scanners, ect.. I bought a few "black boxes" from "Grove enterprises" NC..that Bob Grove sold for scanning stright thru 800 to 900+..
maybe someone else has a "to the point answer" jim
black box
Posted: Sun Apr 11, 2004 12:47 am
by Jim2121
whoever pm'ed me...re: the black box as stated above is the GRC Super Converter II (goes btw. the scanner bnc & & antenna) it works! I'll try to find the schematic. its someplace, its simple, I made a move from Tempe AZ. to Prescott, AZ so only 48 more boxes to open!!! jim
Posted: Sun Apr 11, 2004 8:51 am
by mike m
Hey Jim have you tried the Prescott 900 rptr yet ?
927.3875 151.4 HZ PL. Up on P-Mountain about 800 watts or more ERP.
getting back to the original post, I have modified the VCO's and front ends of several GE 800MHz MPD HT's and hamflashed and modified several 900MHz GE MPA HT's and was only able to get 897 to 930 Receive on the MPD's and barely 902 to 933 on the MPA's in RX.
Haven't tried My Maxtrac But I doubt it would do even the high 880's and 902-928 without some major charge pump changes in the VCO.
Mike
no time !!!!
Posted: Sun Apr 11, 2004 4:51 pm
by Jim2121
Hi Mike! I've only been here a year this month..Haven't gotton around to setting up a ham shack yet. I've hit N9CZV's 900 rptrs. in the Show Low area? & in the valley, with a GTX mobil as I was going down #87...I took that rig out for now, & put in a FT-90 for a while.. thanks for the tip on the 900 freq!... I only have time to talk when mobile.. Dave has an interesting site:
http://www.n9czv.com/ and alot of good repeaters! c u later. Jim