Discussion in 'Homebrew and Kit Projects' started by W0VRA, Aug 22, 2018.
These look the same to me.
Am I missing anything?
You mean they are the same besides the fact one operates on 12v and the other one operates on 30v?
Haha, yeah. In this application 12V is being used to turn 12V on and off, so that's not an issue. I'm asking about the wiring; the TX relay on sub-entry level rig is a little sticky and I realized I had the AXICOM version in a kit that I'm not going to be putting together anytime soon.
Yes, they are pretty much the same, as far as operating voltage and contact voltage/current. But if you are switching RF, the AXICOM may have better isolation specs.
The 30 Volt listing on the second relay is contact rating.
I should have been a little more specific in the OP. I am asking about the wiring/pinouts.
Guess my only concern is if 12v will be enough to operate a 30v relay coil.
Sometimes it does, sometimes it doesn't. May not be enough voltage to pull the relay contacts closed together, or sometimes you end up with relay chatter.
If you already have the relay, give it a whirl. It will either work or it won't.
Of course, It's always possible to construct a simple voltage doubler in the voltage supply circuit to increase the voltage going to the relay coil.
The relay coil voltage requirements for operating the second relay is here:
Well, in that case, the people who built the sub-entry level rig put the wrong relay in, because it's using 12V to switch 12V into the TX section.
And apologies for putting the wrong pic in the OP. The /009 means it uses a 9V control signal. The one in the rig that's sticking is a /012 for a 12V control signal. I should have paid more attention before posting.
Umm... Unless the schematic is drawn wonky, the top one looks like a DPDT relay, but the bottom one is DPST, with two terminals shorted together on each side.
Looks that way to me, too.