Hello All, Let me first state that I do not know how long this condition has existed. I recently added an LP-100 watt meter to my shack and have noticed low transmit power on all bands (10 thru 160) when power is set to 10 watts or greater. I have an KPA100, and with it installed, I see no more than 60 to 70 watts max. My K2 is S/N 3010, and I built it new along with all of the add-ons. To provide the values listed below I removed the KPA100, and connected the LP-100 (recently re-calibrated by Larry Phipps) directly to the K2 base BNC antenna connector, with a DL1 dummy load on the load side of the LP-100 coupler. For input power, I am using a 13.5 VDC 50A power supply, supplying power to the K2 via barrel jack J3. With power set to 2 watts, I am reading 2+ watts on the LP-100 on all bands. With power set to 5 watts, I am reading 5+ watts on all bands. Increasing power to 10 watts results in the following values (and the internal K2 watt meter coincides with these values) : 10m = 9.60w @ 2.56A current draw (seen on the K2 internal watt meter display) 12m = 8.80w @ 2.04A 15m = 9.10w @ 1.74A 17m = 9.40w @ 1.80A 20m = 9.40w @ 1.92A 30m = 9.20w @ 3.14A 40m = 10.10w @ 2.76A (the exception, as 40m is above 10w) 80m = 7.20w @ 2.70A 160m = 7.00w @ 3.12A
When power is further increased to 15 watts, these are the readings: 10m = 12.10w @ 3.00A 12m = 10.60w @ 2.24A 15m = 10.10w @ 2.30A 17m = 11.90w @ 2.34A 20m = 11.50w @ 2.50A 30m = 10.00w @ 4.00A 40m = 9.20w @ 4.10A 80m = 7.40w @ 3.80A 160m = 7.30 @ 4.00A I have gone thru the 40m transmitter alignment and the transmitter alignment steps outlines on pages 72 and 74 of the manual. I also ordered and just replaced (two days ago) the PA transistors thinking this was my problem. But, the issue persists. Any assistance will be much appreciated. 73 Mike Harang K5MMH Franklinton, LA. -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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 Message delivered to [email protected]
