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Re: Desense is driving me crazy
At 5/25/2025 04:08 PM, you wrote: ¡°Whats odd is I've heard several stories about how Hams have got help from Sinclair & they were happy to help out. One fella told me he talked to a Mr. Sinclair
By Bob Dengler · #215585 ·
Re: whelen siren
Agreed. And it's a whole lot easier. Chuck WB2EDV On 5/26/2025 7:13 PM, Chuck via groups.io wrote
By Chuck Kelsey · #215584 ·
Re: whelen siren
If there are multiple codes used for the siren to be set off, you don't want them all to be used. For instance, the storm sirens in our county use two-tone and DTMF for actual activation, as well as
By Chuck · #215583 ·
Re: whelen siren
Roger, I can definitely see the issue with the Wednesday warnings, these could trigger a false alert. I know in my area, they are never on time and usually happen whenever someone decides to do it,
By Kory Oldham W4RZ · #215582 ·
Re: Mastr II 800MHz PA
Okay, I'll hold off for now on the GE MARC/MASTR II 800 MHz PA books. It sounds like you found a good way to go with amps already on 900 MHz. 73, Kimo KH7U [email protected]> wrote:
By Kimo Chun · #215581 ·
Re: whelen siren
He is not rebroadcasting the DTMF sequence, he is using the DTMF to trigger a macro to run a preprogrammed message stating that there is a severe weather alert. This is no different then me hearing my
By Kory Oldham W4RZ · #215580 ·
Re: whelen siren
There are 3 issues that must be considered. 1- The repeater is initiated by someone who is not licensed to do so. (definitely not legal with possible exception from #2) 2- The activation could be
By n5qs · #215579 ·
Re: whelen siren
My argument here is that the DTMF sequence is being sent out by public safety or Dispatch or whoever sets off the siren, probably even EOC, would be activating a repeater, and in that case, the DTMF
By Chad Nelson · #215578 ·
Re: whelen siren
No, it is not. It is a message from the repeater that the siren has been activated. The message transmitted could be anything. It is no different than an operator keying his microphone and making the
By Tom Cole · #215577 ·
Re: whelen siren
Hence my question of the OP - If this is the local volunteer fire department siren alerting it's members to respond to a fire, the answer is a hard no as this is anther radio service. If this siren is
By M Flynn · #215576 ·
Re: whelen siren
would it be possible to have a club radio located at the activation site for the tied to the siren controller, that would send the alert message to the repeater? then only be activated if the control
By Byron Cress · #215575 ·
Re: whelen siren
Read the post. He doesn¡¯t want to rebroadcast anything, just send out a message that the sirens have been activated. But, even if he was , he can legally do it as long as it isn¡¯t something
By Tom Cole · #215574 ·
Re: whelen siren
If I understand this, someone wants to use the alert tones from the frequency that the law-enforcement uses to activate the community sirens to announce over the ham repeater of a warning or siren
By Chad Nelson · #215573 ·
Re: whelen siren
Zero chance of interfering with the sirens since he will only be using a receiver to decode and activate a message that the sirens have been activated (¡°The tornado sirens have been activated in our
By Tom Cole · #215572 ·
Re: whelen siren
I¡¯m reading it as a siren to warn of imminent danger to the community. Only the OP knows at this point. Even if it is a call for a VFD members, it would still be classified as emergency
By Tom Cole · #215571 ·
Re: whelen siren
There is far too much chance of improper or malicious mucking about in this scenario. Let¡¯s start by asking why you feel that it is necessary to make any sort of indication that the sirens have been
By Milton Engle · #215570 ·
Re: whelen siren
Tom, I had to go back and read the original post, and have a question for the OP: "i am looking for a dtmf decoder to connect to a receiver to decode our local EMA whelen siren to give a message on
By M Flynn · #215569 ·
Re: whelen siren
Chris, Wouldn't sending out a storm warning bulletin be legal and fall under the following? I say this with the thoughts of a simple message or even one with a little more detail, warning Hams of
By Kory Oldham W4RZ · #215568 ·
Re: whelen siren
?Chris, You love to say something is illegal with nothing to back it up. You most certainly can automatically re broadcast emergency information, or in this case, broadcast a message that the
By Tom Cole · #215567 ·
Re: whelen siren
Having any announcement, etc on the repeater output automatically from the Wheelan siren system is not allowed under Part 97.....You COULD change CT or something similar but it cannot key the repeater
By Chris Boone WB5ITT · #215566 ·