, aided by feedback from an SWR meter, you should be able
to hit the loop resonance point pretty much dead-on.
>From: "Ron D'Eau Claire" mailto:r...@cobi.biz>>
>Date: December 4, 2015 at 4:09:18 PM GMT-5
>To: "'Elecraft Reflector'" <mailto:elecra
The QEX featured circuit designed by WB0OEW takes a slightly different
approach. It monitors serial communications on the ACC1 of the KX3.
From this it pulls the KX3 operational frequency (AUTO INF must be set)
that it compares to the frequency the loop is currently tuned to. If
these freque
mailman.qth.net
Subject: Re: [Elecraft] [K2/KX3] Tuning a magloop
On 12/4/2015 1:09 PM, Ron D'Eau Claire wrote:
> IMX I tune the loop for maximum noise in the receiver. Properly
> designed small loops have very high Q, so the peak is very "sharp".
Yes. While the RX noise p
On Fri, Dec 4, 2015 at 1:59 PM, Fred Jensen wrote:
> On 12/4/2015 1:09 PM, Ron D'Eau Claire wrote:
>
> Uhhh ... no. No ATU, ever. Everything is done with the little knob on
> the loop while watching the SWR. Conveniently, my K2 displays the SWR. No
> ATU, ever.
>
>
Precisely... this is exa
On 12/4/2015 1:09 PM, Ron D'Eau Claire wrote:
IMX I tune the loop for maximum noise in the receiver. Properly
designed small loops have very high Q, so the peak is very "sharp".
Yes. While the RX noise peak *is* quite narrow, especially on 40 and
30, it is still quite a bit broader than the
There are two parts to tuning a small transmitting loop antenna: Resonating the
loop at the operating frequency and matching the loop at resonance to the
impedance of the feed line.
The Alexloop tuner sounds like a great idea, provided it does both at the same
time.
IMX I tune the loop for m
No, it does not use a bridge at all, actually - no need on a KX3,
makes everything more complicated :-) . I usually use a 2W tuning power
only on the AlexLoop. So far no issues.
Ed
On Fri, Dec 4, 2015 at 12:12 PM, Matt Maguire wrote:
> Does it include a resistive bridge that presents a con
Does it include a resistive bridge that presents a constant 50 ohm impedance to
the radio during tuning? Mag loops can be quite rough on your output
transistors (that's why it is best to peak receiver noise first and only
transmit to do the final tweak)
Matt VK2RQ
Envoyé à partir d'Outlook
Might it also work with a K2?
73,
Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
On 12/4/2015 9:56 AM, Edouard Lafargue wrote:
Hi Gary,
I need to set aside some time to finalize it, but I have designed a
fully automatic AlexLoop tuner th
Hi Gary,
I need to set aside some time to finalize it, but I have designed a
fully automatic AlexLoop tuner that is designed to work with the KX3: you
just need to tune to the frequency you want to use, then press the "tune"
button on the KX3 (long press on XMIT), and the Alexloop will find the
Dave I read your post with interest, as over the weekend I was looking at an
automatic loop tuner described in the November/December isse of ARRL QEX
Magazine. This was for a MFJ-1788 Magnetic Loop working with a KX3 and based
on an Arduino micro-controller. I don't own the MFJ product but I
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