Re: [Repeater-Builder] Multiple receivers one antenna ???
Ralph Hogan wrote: Along these lines, someone on the list mentioned using coax multi-dropped (coax tee) off to each receiver for a voter application. Can't find the original posting. I was curious about the lengths required between the antenna and then to each radio? Being that I work in the CATV field, I use common 75 ohm splitter arrangements for my remote receiver applications. They are cheap (free for me) and are easy to implement. Using a splitter of this type doesn't require any special length to be used from the splitter to the receiver; whatever is convenient is fine. At my one site where I use 250+ watts of transmitter power on VHF, I had discovered that my 4 way CATV splitter for my UHF link-back receivers was getting warm. I am not using any preselector or filter prior to the splitter and had found that 2.5 watts of VHF energy was being dissipated in the splitter. I figure this was happening as the UHF receivers were likely shorting out the VHF energy and it had to be dissipated somewhere. While the splitter gets pretty warm, it hasn't burnt up yet. I do have a helical preselector that I plan on implementing before the splitter. It's 2 sections should eliminate the power reaching the splitter and it should be able to dissipate the energy better. Kevin Custer 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] Multiple receivers one antenna ???
On Sun, 18 Dec 2005, Ralph Hogan wrote: Along these lines, someone on the list mentioned using coax multi-dropped (coax tee) off to each receiver for a voter application. Can't find the original posting. I was curious about the lengths required between the antenna and then to each radio? Ralph, Have a look at page seven of the PDF below and see if it doesn't look familiar. http://www.repeater-builder.com/antenna/tx-rx-elementary-introduction-to-ferrite-isolators-circulators-and-rf-loads.pdf -- Kris Kirby, KE4AHR [EMAIL PROTECTED] BIG BROTHER IS WATCHING YOU! This message brought to you by the US Department of Homeland Security 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] Multiple receivers one antenna ???
Vincent, It's easy! What you need is known as a multicoupler. This unit usually comprises a preselector to limit the bandwidth of the incoming signals, a low-noise amplifier, and a splitter with two, four, or eight output ports. The gain of the amplifier is tailored to the number of splits so that the loss in the splitter is overcome. 73, Eric Lemmon WB6FLY From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Vincent CarusoSent: Sunday, December 18, 2005 1:04 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Multiple receivers one antenna ??? I would like to install one antenna for four link receivers.How complicated is this? What do I need to do this?Thanks in advance YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Multiple receivers one antenna ???
How about a lead to such vendors and some model numbers as well, would be helpful. Mathew Eric Lemmon [EMAIL PROTECTED] wrote: Vincent,It's easy! What you need is known as a multicoupler. This unit usually comprises a preselector to limit the bandwidth of the incoming signals, a low-noise amplifier, and a splitter with two, four, or eight output ports. The gain of the amplifier is tailored to the number of splits so that the loss in the splitter is overcome.73, Eric Lemmon WB6FLY From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Vincent CarusoSent: Sunday, December 18, 2005 1:04 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Multiple receivers one antenna ??? I would like to install one antenna for four link receivers.How complicated is this? What do I need to do this?Thanks in advance YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __Do You Yahoo!?Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Multiple receivers one antenna ???
Good Day If you are able to lose = - 6 db of the signal to each receiver you could use a passive device which you can build yourself and save many many dollars. There is pleny of information on the web on a 4-port Wilkonson divider . The same phasing harness is used for a 4-stack dipole array so you could ask around for one or buy it off the shelf-these are frequenct contious. Regards Bradley Glen ZS5WT http://members.harc.org.za/zs5wt --- Mathew Quaife [EMAIL PROTECTED] wrote: How about a lead to such vendors and some model numbers as well, would be helpful. Mathew Eric Lemmon [EMAIL PROTECTED] wrote: Vincent, It's easy! What you need is known as a multicoupler. This unit usually comprises a preselector to limit the bandwidth of the incoming signals, a low-noise amplifier, and a splitter with two, four, or eight output ports. The gain of the amplifier is tailored to the number of splits so that the loss in the splitter is overcome. 73, Eric Lemmon WB6FLY - From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Caruso Sent: Sunday, December 18, 2005 1:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Multiple receivers one antenna ??? I would like to install one antenna for four link receivers. How complicated is this? What do I need to do this? Thanks in advance - YAHOO! GROUPS LINKS Visit your group Repeater-Builder on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. - __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com 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] Multiple receivers one antenna ???
Thanks for all the great info! YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Multiple receivers one antenna ???
Along these lines, someone on the list mentioned using coax multi-dropped (coax tee) off to each receiver for a voter application. Can't find the original posting. I was curious about the lengths required between the antenna and then to each radio? tnx, Ralph W4XE If you are able to lose = - 6 db of the signal to each receiver you could use a passive device which you can build yourself and save many many dollars. There is pleny of information on the web on a 4-port Wilkonson divider . The same phasing harness is used for a 4-stack dipole array so you could ask around for one or buy it off the shelf-these are frequenct contious. Regards Bradley Glen ZS5WT http://members.harc.org.za/zs5wt It's easy! What you need is known as a multicoupler. This unit usually comprises a preselector to limit the bandwidth of the incoming signals, a low-noise amplifier, and a splitter with two, four, or eight output ports. The gain of the amplifier is tailored to the number of splits so that the loss in the splitter is overcome. 73, Eric Lemmon WB6FLY - From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Caruso Sent: Sunday, December 18, 2005 1:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Multiple receivers one antenna ??? I would like to install one antenna for four link receivers. How complicated is this? What do I need to do this? Thanks in advance 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] Multiple receivers one antenna ???
That sounds like an interesting solution, I would be interested in learning more about it. Ralph Hogan wrote: Along these lines, someone on the list mentioned using coax multi-dropped (coax tee) off to each receiver for a voter application. Can't find the original posting. I was curious about the lengths required between the antenna and then to each radio? tnx, Ralph W4XE If you are able to lose= - 6 db of the signal to each receiver you could use a passive device which you can build yourself and save many many dollars. There is pleny of information on the webon a 4-port Wilkonson divider . The same phasing harness is used for a 4-stack dipole array so you could ask around for one or buy it off the shelf-these are frequenct contious. Regards Bradley GlenZS5WThttp://members.harc.org.za/zs5wt It's easy!What you need is known as a multicoupler.This unit usually comprises a preselector to limit the bandwidth of the incoming signals, a low-noise amplifier, and a splitter with two, four, or eight output ports.The gain of the amplifier is tailored to the number of splits so that the loss in the splitter is overcome. 73, Eric Lemmon WB6FLY - From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com] On Behalf Of Vincent Caruso Sent: Sunday, December 18, 2005 1:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Multiple receivers one antenna ??? I would like to install one antenna for four link receivers.How complicated is this? What do I need to do this? Thanks in advance 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/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Multiple receivers one antenna ???
I've posted this a few times... **IF** loss on the incoming signal(s) isn't an issue ... 1/2-wave (or multiple thereof) jumpers, daisy-chained between Ts. [rx.ant-coax] -- [T-(rx)] -jumper- [T-(rx)] -jumper- [last rx] Our RXs did not exhibit problematic interactions -- used RG58 PL259s. Our common antenna: 1/2-w dipole: ( 2ea x 6 x #18 solid - soldered to a SO239 chassis connector) Seems to play nicely. YMMV. ~/ N8BQN /~ Vincent Caruso wrote: That sounds like an interesting solution, I would be interested in learning more about it. Ralph Hogan wrote: Along these lines, someone on the list mentioned using coax multi-dropped (coax tee) off to each receiver for a voter application. Can't find the original posting. I was curious about the lengths required between the antenna and then to each radio? Ralph W4XE 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/
