Hi Chris I think any raising of the top-wire (loop) will increase the the
vertical component slightly and the ERP is proportional to effective height
squared. It also looks less obtrusive if higher :-)) It is cheaper ERP than
watts :-))
Alan
G3NYK
----- Original Message -----
From: "Chris Wilson [email protected] [rsgb_lf_group]"
<[email protected]>
To: <[email protected]>; <[email protected]>
Sent: Wednesday, November 25, 2015 11:25 AM
Subject: [rsgb_lf_group] Is a capacative top hat only as good as its lowest
point?
25 November 2015
As I am under a lot of pressure with work I was thinking of a quick
and simple way to improve my aerial. Better ground wires under the
perimeter of my horizontal quad loop "top hat" is number one. But
another thing I could probably implement fairly easily is to raise one
corner of it by running that corner to the top of my 40 foot mast with
a fairly long support cord to keep the loop a fair way from it.
Would raising just one corner, (which would also allow a somewhat
higher vertical section), achieve much, if anything? Thanks.
BTW, the power supply bridge rectifier blew in my G3YXM amp the day
before yesterday, and I was testing with the "HV" sourced from a 0 to
40V bench supply. For fun I tried to see how low a voltage to the
FET's it would run at, and I got down to 4.9V measured actually at the
FET's, running. I achieved this contact last night:
2015-11-24 17:50 2E0ILY 0.137536 -25 0 IO82qv 0.1 G4MSN IO93fu 129 34
It has triggered me to pull my finger out and build the 136 kHz filter
for my Hans Summer U3 QRP transmitter!
--
Best regards,
Chris 2E0ILY mailto:[email protected]
------------------------------------
Posted by: Chris Wilson <[email protected]>
------------------------------------
------------------------------------
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