OK. I am at my whit’s end here. The transistor won’t bring the PTT line down enough to trigger. The optoisolator won’t either. The mechanical relays can’t be latched by the com port. The SSR latches but won’t unlatch with DC. So do I run the SSR into an AC mechanical relay? Sounds like a serious Rube Goldberg way of doing it but it should work. There has to be another way though.
It worked fine with the RC 1000 keying it so what does Ron have in that circuit that does the magic? Vern From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ralph Mowery Sent: Friday, April 17, 2009 5:56 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: MASTR II PTT You probably overlooked the simple thing. The PTT line is DC and once the SCR fires it will latch. If you had AC then the voltage goes to zero and the SCR unlatches. --- On Fri, 4/17/09, Vernon Densler <m...@highwayusa.com> wrote: From: Vernon Densler <m...@highwayusa.com> Subject: RE: [Repeater-Builder] Re: MASTR II PTT To: Repeater-Builder@yahoogroups.com Date: Friday, April 17, 2009, 4:35 PM I got a Solid State Relay and the com port will trigger it. (same thing I use to control my Christmas lights from my computer). However for some reason the PTT won’t drop when the SSR shuts off. I know there is some voltage bleed on them but I can’t figure out why it would stay grounded afterwards. Any suggestions on that one?
