Joe, I can sell you something that will do this using DTMF. Might contact me off line at [EMAIL PROTECTED] Don't want to spray the board with ads.
As someone else noted a different CTCSS tone set on a different user's radio channel could be used. Only need a CTCSS decoder, TS64DS, but would have to program the radios. If only few need access to the gate would be easy. If they all do not have DTMF mikes then CTCSS would be cheaper. 73, ron, n9ee/r --- In [email protected], [EMAIL PROTECTED] wrote: > > Hello to All, > > I am starting to develop a future ham repeater relation with a tower site(s) owner and recently got a request for something unusual. The company has a fleet of VHF radio equipped vehicles. They want to pull up to a site, enter a touch-tone sequence on the mike, and open a security gate at the site. I could kludge together something, but would rather find something commercially available. Anytime I have kludged something together, I have ended up having to repair it for longer that I expected. Something with a VHF receiver, TT decode and relay contact output would be great. > > Any ides if this is even made commercially? I know that some fire/ambulance departments use a similar idea to open and close the firehouse door. Some also have the ability to control traffic control lights on their way to a situation. > > 73, Joe, k1ike >
