On Mon, Oct 22, 2018 at 07:43:07AM -0700, Lou Voerman W2ROW wrote: > Ted, > > Elecraft did publish an add on circuit to drive an amp from the K2. The bad > news is that I can not find it on their new website. Tom Hammond N0SS (SK) > designed a PC Board for an amp keying circuit which is no longer available. > However he published the schematic which you can find here: > > N0SS K2 amp keying circuit > <http://www.mmccs.com/mmarc/n0ss/k2_t-r_rly_drvr.pdf> > > I hope the link works. I have not tried this circuit with a KPA500. > > Lou W2ROW >
I built the circuit provided by Elecraft a few months ago to add a KXPA100 amp to my K2. Its been working great once I got it built properly. I used two sources of info, the Elecraft circuit <http://web.archive.org/web/20180316034045/www.elecraft.com/Apps/Amp_keying_ckt.htm> and another page that added some information to the Elecraft page <http://www.mwrs.org.au/2014/04/20/elecraft-k2-amplifier-keying-circuit/>. In the Elecraft page they mentioned that both transistors can be 2N2222, which is what I did. The first link is through the Internet Archive site that allows access to old, saved websitess to allow access to the old Elecraft site. Someone posted about this just a few days ago, which is how I learned of it. 73 Steve N6SAW ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
