For those that might be ibnterested.... FWIW - Using a KX-1+KXAT1, I'm trying to find a way to adapt the (standard?) ~26ft wire with 16ft counterpoise to work on 3.55Mhz...
Here's what I've been thinking... I was initially considering modding the internal KAT1 toroids. The trick there would be to get the three toroids to cover the whole KX-1 range.. the probable outcome would not being able to get below an SWRof 2:1 or 3:1 on many frequencies with the existing antennae . But I remember (when I was G3UTY) being mobile in London, UK on 160M with 10W. We used center-loaded 8ft whips. Very large inefficient coils but we still managed to work the european continent... So here's the situation, as I see it, looking at efficiensy and current/voltage distribution; and bearing in mind that, typically, most /P is done with 25- 40ft of wire. 1) End loading with L+C is probably out due to exremely high voltages and also that's the end needed to hang the wire in the trees/fishing rod/etc... it is still a possibilty. 2) Center loading with L only would be the next best. Middle range voltages and current but it would mean hanging a small weight in the middle of a length of (usually) very light wire. Might not be a practical solution.. 3) Bottom loading which, in this case, is at the KX1 BNC connector.... This gives the L minimum voltage with high current but also has the lowest radiation efficiency. Hanging an extra bit of weight on the BNC connector might not be such a good idea! So perhaps a short length of RG174 which connects to the L (or an LC) circuit would be the best idea but /P operators might not appreciate carring an extra bit of wire in their Go pack! 4) Adding a coil to the counterpoise... in effect making the KX-1 directly feeding an OCF ---- needs more thought ;^-| Any opinions?? Thoughts? Suggestion?? Ooops, better careful answering the latter <Grin> -- Dave G. KK7SS '65 MK III Sprite in Richland, WA If life begins at 50, why am I falling apart ?! _______________________________________________ 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
