Mike, A fellow Ham once gave me a mint-condition SEA ESP1000 repeater, and I had high hopes of converting it to operate in the 222-225 MHz Amateur band. I finally contacted a tech support engineer at SEA, who happened to be Ham, and got both good news and bad news. The good news was that I could purchase the complete service manual on CD-ROM for $50. The bad news was that the modulation on these repeaters was ACSSB- Amplitude Companded Single Side Band, which would require major surgery to convert to FM. The next problem was that neither the power amplifier nor the power supply was able to sustain a full FM carrier for more than perhaps 5 or 10 watts. Finally, the synthesizer was masked to operate only within the commercial 220 band, and could not be programmed into the Amateur segment. This engineer said that even he- someone who was on the ESP1000 design team- would not undertake such an extensive conversion. I finally gave it away to make room for a more viable project. Got a boat...?
73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Mullarkey Sent: Thursday, July 09, 2009 5:17 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] SEA ESP1000 220Mhz Repeater Ok Guy's, Got a new one here and looks to be a gem. Have an abundance of the SEA ESP1000 220Mhz repeaters. The question has anyone heard of them and will they program into the ham bands to utilize this nicely built repeater. They had Trident TNT controllers mated to them and the pin out looks pretty straight forward. We just want to know how to program them and see if they will play nice in the ham bands or are they a boat anchor. Thanks, Mike Mullarkey K7PFJ 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office & Fax 303-718-8052 Cellular
