I have an old PT-2500A with a 120 volt relay. Modern radios don't like such a high voltage on their PTT circuit. Can someone point me to a circuit that will allow control of the 120 volt PTT relay wi
I have a board available. Contact me off list. 73, Jim W7RY Can someone point me to a circuit that will allow control of the 120 volt PTT relay with something in the 12-24 volt range ? Seems like it
Author: gudguyham--- via Amps <amps@contesting.com>
Date: Mon, 26 Dec 2022 22:47:20 +0000 (UTC)
Use a Harbach soft key for an SB220 or use mine. Sent from the all new AOL app for iOS I have an old PT-2500A with a 120 volt relay. Modern radios don't like such a high voltage on their PTT circuit.
OPTO-22 electronic relay. You can't get much simpler than that. 73, Alek VK6APK. Can someone point me to a circuit that will allow control of the 120 volt PTT relay with something in the 12-24 volt r
If going that route, ensure it's a DC-load solid-state relay -- not the more common AC SSR type that typically depends on a zero-crossing. Last time I checked, the PT-2500A amp has a -110 VDC amp ke
Yep. They are DC. On 27/12/2022 9:07 am, Paul Christensen wrote: "OPTO-22 electronic relay. You can't get much simpler than that." If going that route, ensure it's a DC-load solid-state relay -- not
They come in a 60V and 200V DC version. 9 - 15V DC to switch them On 27/12/2022 9:07 am, Paul Christensen wrote: "OPTO-22 electronic relay. You can't get much simpler than that." If going that route
FWIW Jeff at Harbach no longer has the keyer. I have one and wish I could get another. I also have used the Ameritron ARB version. Recently found yet another one on ebay it is a simple relay in a
I have Jim's board in my SB-220, it works great! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps