[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
It semms to me I remember reading a thread concerning automatic power control for FHSS. Apparently someone contacted the FCC and was told while they weren't going to modify the part 97 rules concerning apc they weren't concerned with amateurs using modified part 15 equipment!!! Anybody else rember where this thread was posted? AR902 or somewhere? Brian nb9e
RE: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
That is correct. No external antennas and no amps are allowed by FCC rules. These radios are operating in a 902 ham/Scientific band so you can expect that operations will be noticed by amateurs on the band even if they are FHSS if you are running any significant power. They are allowed on a shared basis and must not create any interference, as well as must accept any interference from authorized users of the band. In many areas of the US the 902 ham band is becoming more popular lately with many repeaters being constructed. (eg. MA and CA due to the 440 band being destroyed by the PavePaws fiasco) Just something to consider. Glenn N1GBY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of rtc_0001 Sent: Sunday, November 23, 2008 10:01 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS I would be carefull in applying an antenna other than a rubber duck. It seems to me these radios fall under a class of non-licensed but having rules specifying no external antennas other than the type it came with. I suspect those rules preclude an antenna connected by coax. I'm not entirely versed in fcc rules nor where this particular radio fits into them but I thought I'd throw this at you as food for thought. --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , Brian R. Chapman [EMAIL PROTECTED] wrote: Just for the heck of it I plugged one of my Radio Shack simplex repeater controllers into the DTR-650. The plug is not quite correct(I'll be checking the print) but this will work. I have a set of the DTR-650's on loan testing their functionality. The pair I have has the integral antenna. Can someone tell me what type of antenna connectors the ones with removeable antennas have? Are they SMA like most other Moto's? I imagine with a small PS and a battery eliminator(lighter cord false battery) connected to a kp-20 on a mountain top out here in NV this scheme might work pretty well!!! Just set the units up for group call. 73 Brian nb9e No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.199 / Virus Database: 270.9.9/1809 - Release Date: 11/24/2008 9:03 AM
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
What if any precludes the use by licensed amateurs of this setuo (excluding the amplifier the other guy mentioned)? It seems under Part 97 rules we could do this!!!Brian nb9e
RE: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
Brian, Why would you think you can't use an amp (or higher power) on 900 MHz as an Amateur? My repeater station is 150W, with added gain via the antenna system; my mobiles are 12W (but there are 35W units available), and my HT's are 4W units... Mark - N9WYS N9WYS/R 927.5250 (PL 151.4) Joliet, IL -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Brian R. Chapman What if any precludes the use by licensed amateurs of this setuo (excluding the amplifier the other guy mentioned)? It seems under Part 97 rules we could do this!!!Brian nb9e
Re: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
n9wys wrote: Brian, Why would you think you can't use an amp (or higher power) on 900 MHz as an Amateur? My repeater station is 150W, with added gain via the antenna system; my mobiles are 12W (but there are 35W units available), and my HT's are 4W units... Mark - N9WYS N9WYS/R 927.5250 (PL 151.4) Joliet, IL -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Brian R. Chapman What if any precludes the use by licensed amateurs of this setuo (excluding the amplifier the other guy mentioned)? It seems under Part 97 rules we could do this!!!Brian nb9e I would look to see if the emission type is allowed for hams on that band.
Re: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
It seems under Part 97 rules we could do this!!! Correct!! As long as you run your callsign as the SSID and are within 902 to 928, you can run all the power you want. (up to 1.5kW) A few things to keep in mind: 1. Good amateur practice still applies. (don't run 1.5kW, even though you *CAN*) 2. Your bandwidth is 20MHz wide. Realize that this wipes out a significant part of the band. I.E. 928-902 = 26 MHz of usable band - that only leaves 6MHz of the band left for someone else. Most devices can employ bandwidth limiting. This is sometimes referred to as cloaking or some other name. By doing this, your throughput goes down, but you are helping your fellow hams by only using 5 or 10 MHz instead of the whole available band. For more on the available bandwidth options and such, check out of this page: http://www.qsl.net/kb9mwr/projects/wireless/allocations.html Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Rd Boswell, PA 15531 - Original Message - From: Brian R. Chapman [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, November 24, 2008 9:38 AM Subject: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS What if any precludes the use by licensed amateurs of this setuo (excluding the amplifier the other guy mentioned)? It seems under Part 97 rules we could do this!!!Brian nb9e Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1806 - Release Date: 11/22/2008 6:59 PM
RE: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
There were certain regs pertaining to the use of the FHSS radios on 902. You would need to check into the FCC rules re. that. I understand your point that the antenna and amp limitations pertain to the unlicensed use of these low power FHSS units, we agree there. But there are also specific regs and limitations for ham use of FHSS which would come into play for amateur use. They are available for anyone who wants to go with Frequency Hopping Spread Spectrum in amateur operation from the FCC web site. It was just an FYI. 73 Glenn N1GBY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Monday, November 24, 2008 10:31 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS Brian, Why would you think you can't use an amp (or higher power) on 900 MHz as an Amateur? My repeater station is 150W, with added gain via the antenna system; my mobiles are 12W (but there are 35W units available), and my HT's are 4W units... Mark - N9WYS N9WYS/R 927.5250 (PL 151.4) Joliet, IL -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com On Behalf Of Brian R. Chapman What if any precludes the use by licensed amateurs of this setuo (excluding the amplifier the other guy mentioned)? It seems under Part 97 rules we could do this!!! Brian nb9e No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.199 / Virus Database: 270.9.9/1809 - Release Date: 11/24/2008 9:03 AM
Re: [Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
Scott Zimmerman wrote: Correct!! As long as you run your callsign as the SSID and are within 902 to 928, you can run all the power you want. (up to 1.5kW) One other thing to keep in mind, you cannot run encryption if you are operating this Internet link as an Amateur Station.
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
Just for the heck of it I plugged one of my Radio Shack simplex repeater controllers into the DTR-650. The plug is not quite correct(I'll be checking the print) but this will work. I have a set of the DTR-650's on loan testing their functionality. The pair I have has the integral antenna. Can someone tell me what type of antenna connectors the ones with removeable antennas have? Are they SMA like most other Moto's? I imagine with a small PS and a battery eliminator(lighter cord false battery) connected to a kp-20 on a mountain top out here in NV this scheme might work pretty well!!! Just set the units up for group call. 73 Brian nb9e
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
I would be carefull in applying an antenna other than a rubber duck. It seems to me these radios fall under a class of non-licensed but having rules specifying no external antennas other than the type it came with. I suspect those rules preclude an antenna connected by coax. I'm not entirely versed in fcc rules nor where this particular radio fits into them but I thought I'd throw this at you as food for thought. --- In Repeater-Builder@yahoogroups.com, Brian R. Chapman [EMAIL PROTECTED] wrote: Just for the heck of it I plugged one of my Radio Shack simplex repeater controllers into the DTR-650. The plug is not quite correct(I'll be checking the print) but this will work. I have a set of the DTR-650's on loan testing their functionality. The pair I have has the integral antenna. Can someone tell me what type of antenna connectors the ones with removeable antennas have? Are they SMA like most other Moto's? I imagine with a small PS and a battery eliminator(lighter cord false battery) connected to a kp-20 on a mountain top out here in NV this scheme might work pretty well!!! Just set the units up for group call. 73 Brian nb9e
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
How are you going to put a duplex channel in the DTRs' ie. make the DTR rx on channel 1 and tx on channel 12 with just a PTT, for the portables in use on the farm?
