Re: [Elecraft] Tuning 88' with KX1 autotuner?
Any time you have trouble loading a given balanced line, simply try adding 5 or 10 feet of line to the feeder and it should tune. You are moving the SWR node along the line to give the tuner a more favorable voltage situation. Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Tuning 88' with KX1 autotuner?
Just wondering if anyone has tried their KX1 with the autotuner on an 88' doublet with a windowline feed? I'm getting ready to erect an 88 footer in my backyard. My height will be around 35ft and I'll have 80 feet or so of ladderline. How did you do the coupling of the ladderline to the kx1, any feedline length issues and how did it load up? tnx jtm (drooling over a kx1) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Tuning 88' with KX1 autotuner?
Jim - That is my antenna, currently installed as an inverted vee with center at 40 feet. I have about 80 feet of window line. I just tried it with my KX1 using an Elecraft 4:1 balun. [Usually, I use an outboard Z match tuner (NORCAL)]. On 40 meters, I got an SWR reading of 2.3 while 30 and 20 meters were 1.1 and 1.0 respectively. I could probably get the SWR on 40 meters down by changing the feed line length. Of course, this would change the other bands. The balanced antennas are harder to match than the end fed wires recommended in the KX1 ATU manual. I get close to 1.0 on all 3 bands with an end fed 80 foot wire sloping up to 30 feet and a 33 foot wire laid on the ground. I highly recommend the KX1 for portable use. 73 - Rick - K7MW - Original Message - From: Jim Miller [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Sunday, February 20, 2005 3:21 PM Subject: [Elecraft] Tuning 88' with KX1 autotuner? Just wondering if anyone has tried their KX1 with the autotuner on an 88' doublet with a windowline feed? I'm getting ready to erect an 88 footer in my backyard. My height will be around 35ft and I'll have 80 feet or so of ladderline. How did you do the coupling of the ladderline to the kx1, any feedline length issues and how did it load up? tnx jtm (drooling over a kx1) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Tuning 88' with KX1 autotuner?
Rick Dettinger wrote: I could probably get the SWR on 40 meters down by changing the feed line length. Of course, this would change the other bands. Easier than trimming (and maybe lengthening!) window line is the following: wrap a piece of aluminum foil about 1 foot (30 cm) wide around the ladder line. Slide it around on the line until you find a place where all the bands are within matching range. You can use more than one piece of foil if it helps. You have made a capacitor whose effect on the impedance will be greater as you approach a voltage loop for a particular band. I have done this successfully with a few hundred watts -- it probably would not be good for very QRO situations where the voltage loops can reach thousands of volts, but it should be safe for your KX1 :-) -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
