Is an External Pullup resistor needed on the FSK (ACC pin 1) input line? One of our Navigator Interface users reported that if the FSK line is also tied to an external pullup resistor, that it caused his K3 to refuse to stay powered up when the cable was connected. He subsequently removed the pullup and the system operated normall.
The pullup resistor is a 4.7K through a diode to +5V. Our original cables for the K3 were wired with this pullup connected, and no problems have been reported until now. We will remove the pullup connection from our drawing since it is not needed, and all future cables will not have this connection. Has there been a change in the K3 that would cause this problem? If so, if earler users upgrade their units to lastest specs, will they also have this problem? Clint KK7UQ _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
