Sorry, I managed to press the wrong key and sent it before I finished it. Anyway... I know that older version of K2 manual refers to changing winding of T4 transformer to 2:2 (instead of original 2:3) in order to increase efficiency of CW performance on 5W or less. Is it still applicable to the current version of K2? I am not interested in SSB mode at all, so limiting max power to 5W is acceptable. I simply want to know whether the rest of tuning instructions will be the same if I change T4 winding according to those directions from rev C manual? (25-30% decrease in current drain is quite important when operating from batteries.) In any case, I am going to add 6.8k resistor to the R2 (of course it depends on the total resistance of R2 in the current kit) on control board according to DK3RED mod (which will limit max power to about 5W anyway), and I want to limit current consumption as well if I can.
I went through the schematics in manuals from revision C, D and G, and as far as I can see nothing indicates that this T4 transformer operation had changed (since it is operating in exactly same output stage as the older versions of K2 PA), so I am assuming it is safe to change its winding. But if I am wrong, please, tell me so. Thank you. On Mon, May 31, 2010 at 5:56 AM, Alexey Kats <[email protected]> wrote: > I have one more question about K2. I noticed that revision C of K2 > manual says that if to increase QRP T4 transfor > > -- > Alexey Kats (neko) > -- Alexey Kats (neko) ______________________________________________________________ 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
