[Repeater-Builder] Good mobile for solar site
I am in the process of setting up a package to be taken to a solar site at 9000 feet in the rockies. I am making an internet remote SIMPLEX system, and I need a radio that would be good for the site. Some of the requirements are: 1) low current on receive 2) Adjustable and clean to 1 watt transmit power 3) stable at varying temperatures 4) Efficient on transmit 5) At least 10% duty cycle 6) Narrow-bandable would be an asset Has anyone ever used a handheld for such a task? If so, what would you suggest? There are no other transmitters on the site (besides microwave), so receiver protection is not that important. Dave Cameron VE7LTD 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/
Re: [Repeater-Builder] Good mobile for solar site
On Tue, 16 May 2006 17:16:46 -, ve7ltd wrote: Has anyone ever used a handheld for such a task? If so, what would you suggest? What Band, and bandwidth do you need Dave? For high speed packet, the Kantronics D4-10 is an awesome radio for UHF and is adjustable from 1 watt to 10 watts. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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/
Re: [Repeater-Builder] Good mobile for solar site
ve7ltd wrote: I am in the process of setting up a package to be taken to a solar site at 9000 feet in the rockies. I am making an internet remote SIMPLEX system, and I need a radio that would be good for the site. Some of the requirements are: 1) low current on receive 2) Adjustable and clean to 1 watt transmit power 3) stable at varying temperatures 4) Efficient on transmit 5) At least 10% duty cycle 6) Narrow-bandable would be an asset Boy, it sounds funny, but I'd be hard pressed to find anything that draws less current on receive then an old Motorola HT-200. Spec was about 11mA squelched, 40-50 or so unsquelched @ rated audio out, IIRC. TX was about 400-500mA @ abt 1-2W out. A 500mAH NiCad pack was spec'd to last at least 8-10 hours on a 10-10-80 duty cycle. Lots o'drawbacks though. Not the least of which is that ground is POSITIVE. Seriously, look for a xtal-controlled radio if you can get away with single-channel operation. uP's draw power... Maybe an HT90/440? -- Jim Barbour WD8CHL 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/
Re: [Repeater-Builder] Good mobile for solar site
At 5/16/2006 10:58 AM, you wrote: ve7ltd wrote: I am in the process of setting up a package to be taken to a solar site at 9000 feet in the rockies. I am making an internet remote SIMPLEX system, and I need a radio that would be good for the site. Some of the requirements are: 1) low current on receive 2) Adjustable and clean to 1 watt transmit power 3) stable at varying temperatures 4) Efficient on transmit 5) At least 10% duty cycle 6) Narrow-bandable would be an asset Boy, it sounds funny, but I'd be hard pressed to find anything that draws less current on receive then an old Motorola HT-200. Spec was about 11mA squelched, 40-50 or so unsquelched @ rated audio out, IIRC. TX was about 400-500mA @ abt 1-2W out. A 500mAH NiCad pack was spec'd to last at least 8-10 hours on a 10-10-80 duty cycle. Lots o'drawbacks though. Not the least of which is that ground is POSITIVE. How 'bout the HT-220? IIRC much better sensitivity, also a power miser @ 11 ma RX current as well. I seem to see a lot more of them at swap meets than the HT-200. Maybe because the latter have all been bought up by museums? True mobile radios will draw a lot more current since that wasn't a primary driver in their design, even if they're xtal-controlled. G.E. MVPs draw at least 250 mA on RX. Bob NO6B 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/
