Gil, I doubt that a 'front-end protector' would be required on the K2 RANT input - the input path is through D3 and D4 in the T/R switch, and both are back biased with the 8T signal during transmit - so as long as the peak signal on the receive antenna is less than the bias voltage on the diodes (8 volts), the signal should not get through - OK, consider 2,67 volts for a safety factor of 3). If you feel that this is not good enough, you may want to install a pair of back to back diodes directly across the receive antenna jack.
As for the protection of a separate receive preamp - I can give no response since I know nothing about your particular preamp and connections - again, a pair of back to back diodes (1N4148 or similar) across the preamp input should provide adequate protection if required - a couple of 1N4148 diodes is likely much less expensive than a commercial 'front-end protector', and I would guess that such a device is nothing more than a pair of diodes (of course, I am speaking from ignorance since I have not investigated any such devices). 73, Don W3FPR > -----Original Message----- > > I have seen advertised front end protectors recommended for use when > utiilzing a separate antenna for receive. Does the K2's RANT > option on the > 160 board offer sufficient protection for use with a separate > preamp and RX > antenna or is it prudent to use a front end protector such as designed by > KD9SV? > Thanks, > Gil NN4CW > K2 #3104 > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
