Phil, The closest you're going to get to plug-'n'-play amplifier isolation is by purchasing a commercial keying buffer, one for each amp and split the K3 key line three ways to the input of one of these devices. The output from each device would go to its own amp. For three devices that's USD $90-$180 depending on the model + the cost of cables.
http://www.theheathkitshop.com/page13/page13.html http://www.radiobooks.com/products/svkr.htm http://www.ameritron.com/Product.php?productid=ARB-704 By contrast, three silicon diodes can be purchased with pocket change and can be easily inserted into RCA plugs with just a bit of soldering necessary. Paul, W9AC ----- Original Message ----- From: "Phil LaMarche" <[email protected]> To: "'Paul Christensen'" <[email protected]>; <[email protected]> Sent: Wednesday, December 16, 2009 4:58 PM Subject: RE: [Elecraft] K3 Amplifier Keying > > Wow! Not being an engineer, I didn't think it would be so difficult. > Many > replies, thank you. Is something commercially availiable for a non techie > like me? > > Phil > > > Philip LaMarche > LaMarche Enterprises, Inc. > www.instantgourmetspices.com > > www.w9dvm.com > 800-395-7795 pin 02 > 727-944-3226 > FAX 727-937-8834 > NASFT 30210 > > K3 #1605 > > CCA 98 00827 > CRA 1701 > > W9DVM > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Paul Christensen > Sent: Wednesday, December 16, 2009 4:50 PM > To: [email protected] > Subject: Re: [Elecraft] K3 Amplifier Keying > > Phil, > > You may want to isolate all three key lines using one of the many keying > buffers available. At an absolute minimum, consider using three steering > diodes if only using a splitting RCA jumper cable from the K3 to the amps, > using one diode (e.g., 1N4007 or if necessary, a Schottky type) for each > amp > key line from the K3 with all the cathodes combined together and pointing > back to the K3 amp key line. > > The ne-plus-ultra solution for selecting one of three amps from one of > three > rigs may be available in the very near future from W8ZR... > > http://www.w8zr.com/homebrew/StationPro.htm > > Paul, W9AC > > ----- Original Message ----- > From: "Phil LaMarche" <[email protected]> > To: <[email protected]> > Sent: Wednesday, December 16, 2009 4:28 PM > Subject: [Elecraft] K3 Amplifier Keying > > >> My K3 will be keying 3 amplifiers....144...50 and HF. I have two amp >> keyers >> that can be used or just one. Should I find an RCA cable with 3 females >> and >> one mail or does anyone have a better suggestion. >> >> Thanks >> >> Phil >> >> >> Philip LaMarche >> LaMarche Enterprises, Inc. >> <http://www.instantgourmetspices.com/> www.instantgourmetspices.com >> >> www.w9dvm.com <http://www.w9dvm.com/> >> 800-395-7795 pin 02 >> 727-944-3226 >> FAX 727-937-8834 >> NASFT 30210 >> >> K3 #1605 >> >> CCA 98 00827 >> CRA 1701 >> >> W9DVM >> >> >> >> ______________________________________________________________ >> 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
