I agree, the KAT2 is the bomb! Sent from my iPad
On Mar 10, 2013, at 10:04 AM, Don Wilhelm <[email protected]> wrote: > Don, > > Welcome to the Elecraft list. You must be posting properly, your post made > it to the list. > > When you hold the TUNE button, there is only a brief 'beep' not a tone. > > During a TUNE, the basic K2 (no KAT2) displays the power output as measured > with a simple diode RF detector. That power level will only be correct if > the K2 is operating into a load impedance of 50 ohms pure resistive. The > variation as you move across the band is due to variation in the actual > impedance of your antenna as seen at the shack end of your transmission line. > > But OTOH, the K2 will attempt to control power at whatever level is set on > the Power 'requested' knob, so if you are set to 10 watts, the K2 will try to > adjust the drive until the RF voltage from the RF detector is equal to that > power level driven into a 50 ohm pure resistive load. SWR into your feedline > will affect the actual power developed by the K2. An 80 meter antenna will > have a significant change in SWR over the band. You may have to retune the > Z100 frequently when moving across the band to allow the K2 to properly > control the power. > > For tuning your Z100, holding the TUNE button will transmit at whatever power > level is set on the power knob, so the maximum power that your Z100 tuner > should have during a tuning cycle sets the limit. Set that power level with > the Power knob. After tuning, set the power to your desired operating power. > During the time the Z100 is tuning, the power out indication may vary all > over the board as the SWR is constantly changing while the tuner seeks a low > SWR. > > The addition of a KAT2, KPA100 or KAT100 will provide better power control > with your K2 because those options contain wattmeters (as opposed to a simple > RF voltage detector) which remove the SWR dependency from the power control > operation. > > The bottom line of all this is that the K2 controls power differently than > your prior transceivers. The K2 tries to measure the actual RF output and > computes what it 'thinks' is the power into a 50 ohm resistive load, then > adjusts the drive to bring the output up to what you have requested. Most > other transceivers simply adjust the drive to the PA and let it go at that. > > With the antenna that you have, you should consider the addition of the KAT2 > (or if you are considering a future addition of the KPA100, use the KAT100), > The built-in wattmeter make tuning antennas much easier. > > 73, > Don W3FPR > > > On 3/10/2013 8:20 AM, bukar wrote: >> I hope that I am posting this properly, if not please correct me. :-) >> >> I am the new owner of K2/10 #5001. I am more used to tuning up the hybrid >> Kenwoods so while I am looking forward to moving to this more modern radio I >> have some questions. >> >> I think that I must have toggled something off as I no longer can get a tone >> when I push the "tune" switch on and off. It was working but I was in the >> menus and fear I have done something to cause this. I can't find the page >> in the manual to correct this. Any suggestions? >> >> Also, when I tune the radio with my LDG z100 tuner should I dial back the >> power on the rig to 3-2 watts before tuning, get a match and then go back to >> 10 watts? >> >> I don't understand the read out I get on the display. The Po number that is >> displayed after the tune up, is that the recommended max power to use at >> that particular match? I am trying to keep my power out to 10 watts but some >> matches even a few kelos apart will display a Po reading from 15 to >5 as I >> tune across the band. >> >> I am using the rig SSB into a 80 meter dilpole at 40 feet. >> 73 >> Don Bukar >> KJ4RQV >> ______________________________________________________________ >> 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
