Re: [Repeater-Builder] using two radios in tandem
The biggest and longest running net here in Chicago, which the NWS itself monitors and takes reports from, is done this way. Been running every Monday and every severe weather situation since I can remember. It is done over 3 or 4 repeaters,VHF and UHF,and a 2M simplex frequency at thesame time.Works for us.Spotters simply call net control and gives there report when acknowledged. We see plenty of tornados and have had no problems with reporting.A good net control operator can and *WILL*handle it, and no amount of radio linking or technology could overcome a bad net control.As for the legalities, this is not used for "broadcast" purposes, it is designed to further expand the ability to provide emergency communications, which I would argue *WOULD* hold up under any scrutiny.I say with the right audio mixer or D/Ayou can distribute one mic across as many radios as you need and set the levels right for each radio. Should be no problem and is done here reliably.Good luck Paul, and let us know how it works out!Tom W9SRVNate Duehr [EMAIL PROTECTED] wrote: Paul Holm wrote: In this particular situation, the users don't need to hear each other. This will be used for running a Skywarn net on two repeaters which are not linked. Only the net control station needs to hear everyone. Users will be trained to expect this format.If there's ever a situation where there's no one at all on repeater #2 and the Net controller is gabbering away at people on repeater #1...The Net Controller isn't communicating with anyone on repeater #2, thus making multiple one-way transmissions on Repeater #2... thus, illegal.Unless you're going to claim all of his half-conversation transmissions to people on Repeater #1 going out also over Repeater #2 are QST's...I don't think that'd hold up to any reasonable amount of scrutiny.I also wouldn't want to be out in the field watching tornadoes wondering if the Net controller was going to hear me or the other guy when two of us have emergencies on both repeaters at the same time.Run two proper Nets or link the repeaters. The other way appears to be both illegal and dangerous for your participants.Nate WY0XYahoo! 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/ Do you Yahoo!? With a free 1 GB, there's more in store with Yahoo! Mail. 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] using two radios in tandem
Mark A. Holman wrote: Simulcast can happen on 2 separate frequencies using a device to do it. Then it's not simulcast anymore. Simulcast is transmitting the same information on the same frequency from more then one location/antenna. More then one frequency, and it's multi-cast. -- 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] using two radios in tandem
Paul Holm wrote: In this particular situation, the users don't need to hear each other. This will be used for running a Skywarn net on two repeaters which are not linked. Only the net control station needs to hear everyone. Users will be trained to expect this format. If there's ever a situation where there's no one at all on repeater #2 and the Net controller is gabbering away at people on repeater #1... The Net Controller isn't communicating with anyone on repeater #2, thus making multiple one-way transmissions on Repeater #2... thus, illegal. Unless you're going to claim all of his half-conversation transmissions to people on Repeater #1 going out also over Repeater #2 are QST's... I don't think that'd hold up to any reasonable amount of scrutiny. I also wouldn't want to be out in the field watching tornadoes wondering if the Net controller was going to hear me or the other guy when two of us have emergencies on both repeaters at the same time. Run two proper Nets or link the repeaters. The other way appears to be both illegal and dangerous for your participants. Nate WY0X 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] using two radios in tandem
Yep, that was my point as well. Seems like a train wreck waiting to happen for sure. You'd be better off with one guy just manning two rigs with their own. Chuck WB2EDV Nate Duehr wrote: Paul Holm wrote: In this particular situation, the users don't need to hear each other. This will be used for running a Skywarn net on two repeaters which are not linked. Only the net control station needs to hear everyone. Users will be trained to expect this format. If there's ever a situation where there's no one at all on repeater #2 and the Net controller is gabbering away at people on repeater #1... The Net Controller isn't communicating with anyone on repeater #2, thus making multiple one-way transmissions on Repeater #2... thus, illegal. Unless you're going to claim all of his half-conversation transmissions to people on Repeater #1 going out also over Repeater #2 are QST's... I don't think that'd hold up to any reasonable amount of scrutiny. I also wouldn't want to be out in the field watching tornadoes wondering if the Net controller was going to hear me or the other guy when two of us have emergencies on both repeaters at the same time. Run two proper Nets or link the repeaters. The other way appears to be both illegal and dangerous for your participants. Nate WY0X Yahoo! Groups Links 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] using two radios in tandem
Simulcast can happen on 2 separate frequencies using a device to do it. You will also reccomend spacing of both transcievers several miles away. off hand I cannot recall the manufacture of such a device unless someone on this group sells them. mark h. Paul Holm wrote: Ihave a particular situation where I'd like to use two radios in tandem. The purpose is to be able to run a net on two repeaters which are not linked. I am looking at using GE Phoenix radios because of cost and availability. The idea is to interface two radios in order that they would TX in tandem(and RX in tandem) using one microphone. My thought is that it would be straightforward to tie the PTT lines together. Does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? Thanks, Paul -- MZ 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. begin:vcard fn:Mark A. Holman n:Holman;Mark A. email;internet:[EMAIL PROTECTED] title:Webmaster, IT Student note;quoted-printable:IT, Student Member IEEE, Life Member ARRL, Assoc. Member SBE, CRO, ARRL= VE=0D=0A= Welcome to the Snowy stuff of Michigan=0D=0A= x-mozilla-html:TRUE url:http://www.ab8ru.org version:2.1 end:vcard
Re: [Repeater-Builder] using two radios in tandem
I am not an expert, but the first mic circuit would need an impedance transformer, to keep the indivual mic circuits balanced or the audio level will be less. 73's, Jim Kh6jkg. __ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp 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] using two radios in tandem
We're not talking hi-fi here. Many radios are nominally 600 ohm input impedance and it's definitely not critical. Sure, you could end up with a 300 ohh load, but the mikes also have preamps in them, so they probably don't care either. Just talk 3dB louder. Bob M. == --- [EMAIL PROTECTED] wrote: I am not an expert, but the first mic circuit would need an impedance transformer, to keep the indivual mic circuits balanced or the audio level will be less. 73's, Jim Kh6jkg. __ 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] using two radios in tandem
I did this once a long time ago,put 2 mic elements in one case,wired two ptt lines on seperate sides of the switch,no interconnections between rigs at all! Added a selector switch to select either or both. Worked perfectly even with completely different radios73,Lee Bob M. wrote: We're not talking hi-fi here. Many radios are nominally 600 ohm input impedance and it's definitely not critical. Sure, you could end up with a 300 ohh load, but the mikes also have preamps in them, so they probably don't care either. Just talk 3dB louder. Bob M. == --- [EMAIL PROTECTED] wrote: I am not an expert, but the first mic circuit would need an impedance transformer, to keep the indivual mic circuits balanced or the audio level will be less. 73's, Jim Kh6jkg. 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] using two radios in tandem
Here is a little mixer circuit that will work for mixing mics. I never built this one to really speak for how well it works. http://www.aaroncake.net/circuits/mixer2.htm N3FLR - Frank On 1/29/2006 2:11 PM, [EMAIL PROTECTED] wrote: I am not an expert, but the first mic circuit would need an impedance transformer, to keep the indivual mic circuits balanced or the audio level will be less. 73's, Jim Kh6jkg. __ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp Yahoo! Groups Links -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006 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] using two radios in tandem
In this particular situation, the users don't need to hear each other. This will be used for running a Skywarn net on two repeaters which are not linked. Only the net control station needs to hear everyone. Users will be trained to expect this format. Getting back to the technical stuff, does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? Paul - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 26, 2006 9:13 PM Subject: Re: [Repeater-Builder] using two radios in tandem The technical aspect is moot. Logistically, you can't do it. You call up the net and a station on both repeaters respond but they can't hear each other. How are you going to handle that? Chuck WB2EDV Paul Holm wrote: I have a particular situation where I'd like to use two radios in tandem. The purpose is to be able to run a net on two repeaters which are not linked. I am looking at using GE Phoenix radios because of cost and availability. The idea is to interface two radios in order that they would TX in tandem(and RX in tandem) using one microphone. My thought is that it would be straightforward to tie the PTT lines together. Does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? 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] using two radios in tandem
You can parallel two Motorola MaxTrac radios, so I'd think you can also do it with two other same-model radios as well. You might not have enough mike level for each radio, but that could be overcome by close-talking the mike. Of course you will need two antennas, or some kind of tuned diplexer unit if you have to feed two radios into one antenna. Also make sure your power supply can handle the load of two radios and then some. Bob M. == --- Paul Holm [EMAIL PROTECTED] wrote: In this particular situation, the users don't need to hear each other. This will be used for running a Skywarn net on two repeaters which are not linked. Only the net control station needs to hear everyone. Users will be trained to expect this format. Getting back to the technical stuff, does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? Paul - Original Message - From: Chuck Kelsey [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 26, 2006 9:13 PM Subject: Re: [Repeater-Builder] using two radios in tandem The technical aspect is moot. Logistically, you can't do it. You call up the net and a station on both repeaters respond but they can't hear each other. How are you going to handle that? Chuck WB2EDV Paul Holm wrote: I have a particular situation where I'd like to use two radios in tandem. The purpose is to be able to run a net on two repeaters which are not linked. I am looking at using GE Phoenix radios because of cost and availability. The idea is to interface two radios in order that they would TX in tandem(and RX in tandem) using one microphone. My thought is that it would be straightforward to tie the PTT lines together. Does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? __ 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/
[Repeater-Builder] using two radios in tandem
Ihave a particular situation where I'd like to use two radios in tandem. The purpose is to be able to run a net on two repeaters which are not linked. I am looking at using GE Phoenix radios because of cost and availability. The idea is to interface two radios in order that they would TX in tandem(and RX in tandem) using one microphone. My thought is that it would be straightforward to tie the PTT lines together. Does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? Thanks, Paul 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] using two radios in tandem
The technical aspect is moot. Logistically, you can't do it. You call up the net and a station on both repeaters respond but they can't hear each other. How are you going to handle that? Chuck WB2EDV Paul Holm wrote: I have a particular situation where I'd like to use two radios in tandem. The purpose is to be able to run a net on two repeaters which are not linked. I am looking at using GE Phoenix radios because of cost and availability. The idea is to interface two radios in order that they would TX in tandem(and RX in tandem) using one microphone. My thought is that it would be straightforward to tie the PTT lines together. Does anyone have any advice on the microphone connections? Could the MIC HI and GND lines simply be paralleled? Thanks, Paul YAHOO! GROUPS LINKS * Visit your group Repeater-Builder http://groups.yahoo.com/group/Repeater-Builder on the web. * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service http://docs.yahoo.com/info/terms/. 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/
