Sorry again. Reading my own email, I discovered a problem. The standard winding ratio is the ONLY one to be used with the KSB2 option installed. The "increased efficency at 5 watts" ratio is only for CW and at power levels of 5 watts or less. The efficiency at greater power levels is less than using the standard ratio.
73, Don W3FPR On 3/15/2011 11:02 PM, Don Wilhelm wrote: > Hi and sorry about the bandwidth. > > I recall receiving a query about the T4 alternate winding ratio within > the past week, but cannot locate the email to respond properly. > > The normal winding ratio for T4 is to be used. It must NOT be used if > the KSB2 option is installed. > > In other words, it can only be used with a CW only, QRP only (at 5 watts > or less) type K2. > > While the alternate QRP winding of T4 may produce greater efficiency at > the 5 watt level, if used at levels above 5 watts, the efficiency is > actually reduced. > > In other words, I do not recommend that the alternate ratio for T4 be > installed on any K2. I have seen several that have this modification > that have been sold, and the buyer adds the KSB2, then wonders why the > K2 "acts funny in transmit" when used for SSB. > > If the original person asking this question has any more questions, > please contact me off-list. > > 73, > Don W3FPR > ______________________________________________________________ > 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
