Re: [Repeater-Builder] Zetron SCU controller
Hi Ian, Does anyone have any info on the unit in question that generated those tones? I'd love to find one - just for memorabilia. That tone format has been around for a long time in mobile radio (Motorola Quik-Call I) and is still being used in aviation (ICAO SELCAL) to page aircraft on the company channel. A chime informs the flight crew that a message follows (in case the volume has been turned down -- it happens when you have three radios going... :-). Aviation uses SELCAL on VHF-AM and HF channels, but on HF the tones are sent with amplitude modulation to ensure proper decoding while the conversations take place on SSB. Our air/ground interconnect and 7330 repeater controller support SELCAL because commercial customers still use it. 73, Bob Bob Schmid, WA9FBO, Member S-COM, LLC PO Box 1546 LaPorte CO 80535-1546 970-416-6505 voice 970-419-3222 fax www.scomcontrollers.com **New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News more. Try it out (http://local.mapquest.com/?ncid=emlcntnew0002)
Re: [Repeater-Builder] Zetron SCU controller
Lots of equipment can encode the 2+2 Quick Call format but since today's decoders are software based (counting squared off audio waveforms) instead of hardware based (mechanical reeds) nothing I have seen recently will accurately decode the format. Milt N3LTQ - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, October 11, 2008 6:37 PM Subject: Re: [Repeater-Builder] Zetron SCU controller Hi Ian, Does anyone have any info on the unit in question that generated those tones? I'd love to find one - just for memorabilia. That tone format has been around for a long time in mobile radio (Motorola Quik-Call I) and is still being used in aviation (ICAO SELCAL) to page aircraft on the company channel. A chime informs the flight crew that a message follows (in case the volume has been turned down -- it happens when you have three radios going... :-). Aviation uses SELCAL on VHF-AM and HF channels, but on HF the tones are sent with amplitude modulation to ensure proper decoding while the conversations take place on SSB. Our air/ground interconnect and 7330 repeater controller support SELCAL because commercial customers still use it. 73, Bob Bob Schmid, WA9FBO, Member S-COM, LLC PO Box 1546 LaPorte CO 80535-1546 970-416-6505 voice 970-419-3222 fax www.scomcontrollers.com -- New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News more. Try it out!
Re: [Repeater-Builder] Zetron SCU controller
Yet is should. It's no different than DTMF. Chuck WB2EDV - Original Message - From: Milt To: Repeater-Builder@yahoogroups.com Sent: Saturday, October 11, 2008 7:29 PM Subject: Re: [Repeater-Builder] Zetron SCU controller Lots of equipment can encode the 2+2 Quick Call format but since today's decoders are software based (counting squared off audio waveforms) instead of hardware based (mechanical reeds) nothing I have seen recently will accurately decode the format. Milt N3LTQ
[Repeater-Builder] Zetron SCU controller
Hi fellows. This is a little off topic, but lately I have been watching and taping the old EMERGENCY! shows on WRTN Buffalo on DISH Network. 4PM eastern. From reading on some fan sites, the dispatcher, Sam Lanier, who was a real LA County fire dispatcher, used a ZETRON Station control unit to send out those tones that were heard in the station, and opened the doors. Does anyone have any info on the unit in question that generated those tones? I'd love to find one - just for memorabilia. Thanks again Ian VA2IR VE2RMP VHF/UHF Repeater group Irlp Nodes 2570 and 2006
Re: [Repeater-Builder] Zetron SCU controller
On Fri, 10 Oct 2008 15:52:34 -, Ian Miller wrote: shows on WRTN Buffalo on DISH Network. VA2IR I'm SURE you meant Expressvu or Starchoiceright :) Tedd Doda, VE3TJD Lazer Audio and Electronics ESSO plaza at exit 268 off HWY 401 Phone: 519-513-0377 My idea of a Symphony 8 Pistons playing the tune my right foot tells them to.
Re: [Repeater-Builder] Zetron SCU controller
They may have used a Zetron in later years, but at the time the program was made, Zetron wasn't in existence. See this and you'll have what you seek: http://www.policeinterceptor.com/emerg.htm Chuck WB2EDV - Original Message - From: Ian Miller [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 10, 2008 11:52 AM Subject: [Repeater-Builder] Zetron SCU controller Hi fellows. This is a little off topic, but lately I have been watching and taping the old EMERGENCY! shows on WRTN Buffalo on DISH Network. 4PM eastern. From reading on some fan sites, the dispatcher, Sam Lanier, who was a real LA County fire dispatcher, used a ZETRON Station control unit to send out those tones that were heard in the station, and opened the doors. Does anyone have any info on the unit in question that generated those tones? I'd love to find one - just for memorabilia. Thanks again Ian VA2IR VE2RMP VHF/UHF Repeater group Irlp Nodes 2570 and 2006 Yahoo! Groups Links
