Colin, No, I mean that D15 would be better connected directly to the coil of K5. Right now, the cathode of D15 is connected to the cathode of D14. You can cut that short trace between the diode cathodes and solder a short jumper from the cathode of D15 to the K5 coil + side - it will be connected to the right place if you wire to the relay pin (K5 common) just to the right (looking at the bottom side) of the cathode end of D15.
In actual practice, it it not critical that the change be made. 73, Don W3FPR On 8/4/2011 7:01 AM, Colin VE3MSC wrote: > Don - do you mean diode across the K6 and K7 relay coil or do you > mean connect at the NO contact of K5 ? From schematic in Rev E Owner > Manual, it looks like K5 normally open contact provides 12T that > connects to both K6 and K7 coils. The PN2222 preamp + MAR3 are > powered by same 12T, and I expect a negative spike would be bad there. > > ______________________________________________________________ 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
