BUT just because you bought it direct from Palstar does not mean it is a good dummy load! The ONLY way you KNOW it is a good dummy load is for YOU to measure it with known good test equipment and an ohm-meter is not how it is done!
73 and Merry Christmas, Tom - W4BQF -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Phil Hystad Sent: Thursday, December 22, 2011 3:40 PM To: [email protected] Cc: Elecraft List Subject: Re: [Elecraft] K3 + LP100A + Dummy Load The dummy load is the Palstar DL2K, full legal limit handling and I bought it new from Palstar several years ago. None of my operating equipment was purchased at hamfests -- I prefer to be the original owner and pass over any potential difficulties. peh On Dec 22, 2011, at 12:20 PM, [email protected] wrote: > > Phil, > > You don't say what type of dummy load you are using, but all of the cantenna > type have about the same SWR curve you witnessed. You will need a precision DL > to get a flat response across a large range. I have two DECIBEL DB4304B 100 > watt loads here that are flat up through 2m. I don't think they are made any > more and if they were they would be very expensive. The two I have were bought > at a ham hamfest for $50 each. They are bout 6" x 4" x 4" Most of which is > cooling fins. > > Be careful when you buy dummy loads like this at a Hamfest. Take a good > ohm-meter with you. I bought a couple of really well made heavy duty DL's that > were rated at 300w for $100 once and when I measured them at home they were 75 > ohm loads, so watch out! > > Happy holidays, > > 73, > Tom > Amateur Radio Operator N5GE > ARRL Lifetime Member > QCWA Lifetime Member > > "If somebody has a bad heart, they can plug this jack in at > night as they go to bed and it will monitor their heart > throughout the night. And the next morning, when they wake up > dead, there'll be a record." > > --Mark S. Fowler, FCC Chairman, > 1981 - 1987 > > > On Thu, 22 Dec 2011 08:37:37 -0800, Phil Hystad <[email protected]> wrote: > >> Is this normal or can someone explain? I was looking at the R+iX values reported by the LP100A with my K3 feeding a dummy load. The SWR reported was always small but never super close to 1:1. Most of the SWR in this setup was 1.1:1 up to 1.5:1. The R values ranged from 34 ohms to up to 59 ohms and X was ranging over a number of smallish values < 20 for all the bands. >> >> Is this what most of you would call normal? >> >> Does the K3 output R+iX vary from band to band (I assume so) and is that what I am seeing? >> >> I had thought my dummy load was mostly frequency independent so I am not sure if I am seeing mostly the K3 here or maybe the K3 plus the 6 feet of coax (RG8X) + dummy load. >> >> 73, phil, K7PEH >> > > > ______________________________________________________________ > 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
