[Elecraft] Low Power on 10 Meters

2007-03-25 Thread William M. Spaulding, SR
Folks, I'm having a real struggle getting 6 to 7 WATTS on 28 Mhz while all other all other bands come up with a number well in excess of 10 Watts. Has anyone experienced this problem and was able to solve it? I'm suspecting low pass filters that are not coordinated to the 10 Meters Caps, if

Re: [Elecraft] Low Power on 10 Meters

2007-03-25 Thread Don Wilhelm
Bill, The most common cause of low output on 10 meters is T2 - be certain it is wound exactly like the illustration in the manual (except for the number of turns in the illustrations which may or may not be correct). The second thing is T4 - be certain it is wound as instructed in the

Re: [Elecraft] Low Power on 10 Meters

2007-03-25 Thread David Wilburn
If all else is well, then consider how you are measuring it. As Don has pointed out before, the internal power meter expects a 50 ohm load. After trying several configuration that showed 6w on 10m, I checked the dummy loads. All three were showing 1.2 swr with an analyzer. I then connected

Re: [Elecraft] Low Power on 10 Meters

2007-03-25 Thread Don Wilhelm
Dave, That is an excellent method of achieving a 1:1 SWR with an unknown (or questionable) dummy load. Thanks for the reminder. Just be aware that the SWR=1 condition is frequency sensitive - the tuner must be retuned if the frequency or band is changed. 73, Don W3FPR David Wilburn

Re: [Elecraft] Low Power on 10 Meters

2007-03-25 Thread David Wilburn
That is absolutely right Don. I was playing with it several different ways, and using the tune button and the manual tuner you could really see it jump when you got it dialed in. The output of the power meter on the K2 was considerably more sensitive than the meter on the tuner, and was able