Oops, the txinh in Ed's circuit is done with relay k4 which pulls the line to ground, eliminating Any ambiguity. My mistake was assuming k1 was doing this function, instead of its clearly indicated action of switching control between the k3 and ft 847.
Mea culpa Mark. N2QT On Jan 27, 2013, at 7:31 PM, Mark <[email protected]> wrote: > Be aware that Ed's circuit is much like mine in that it does not have a pull > down on the > TxInh line. Therefore it could act like mine did and extend the time till > transmit is > enabled. A resistor to ground might be a good addition if this is important. > > Also as a side note, the kx3 is different from the k3 in that it has a pull > up on its txinh pin > (actually on ACC2) so if you select txinh=hi, the radio will not transmit > without something > to pull the line down. > > Mark. N2QT > > On Jan 27, 2013, at 11:51 AM, Edward R Cole <[email protected]> wrote: > >> Although Mark has solved his INH problem, I thought I would share my ckt for >> using the inhibit function with the K3 (in fact it also has ckts for >> inhibiting a FT-847 which I no longer have): >> http://www.kl7uw.com/TX-INHIBIT.htm >> >> I use the Band-0 and Band-1 select functions to control VHF inhibiting, >> only. One can omit them for using inhibit for all frequencies. DIGOUT-1 is >> used for 6m inhibit in my station. >> >> What is not shown in my current configuration is that the inhibit line is >> run thru TR relay sense contacts to ensure TR relays are in Tx position >> before enabling xmit on the K3 (useful if running QRO). >> >> Hope this is helpful for anyone planning use of the K3 INH function. >> >> 73, Ed - KL7UW >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
