What is the best way to do this? I am not familiar with automatic tuners.
TIA,
Michael, W1RC
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A random-length wire is usually chosen to avoid a half-wavelength on the
frequencies you’ll be using. A more accurate term is non-resonant end-fed
antenna.
Avoiding half-wavelengths means the impedance will not be 5000 Ω or greater,
but it will be pretty high. Or low. The SWR on the feed line w
Mr. Mike,
Be sure you have the KAT3 internal ATU "enabled" and not bypassed, be sure
the proper antenna is selected (ANT 1 or ANT 2) for your random wire, and
press (momentary) the ATU TUNE button. The relays will clatter a bit, and
you'll see the displayed SWR ratcheting down, maybe up for short
Of Mister Mike
Sent: Saturday, December 12, 2020 9:42 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??
What is the best way to do this? I am not familiar with automatic tuners.
TIA,
Michael, W1RC
Very occasionally the K3 ATU will not find a good match and you may be
able to do better by setting the tuning elements yourself. That is the
case for my 70' endfed wire on 160m. The ATU will match it on all other
bands though.
To tune the elements manually select "LC Set" in the Config:KAT3 m
W3LPL
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Mister Mike
Sent: Saturday, December 12, 2020 9:42 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??
What is the best way to do this? I am not
ire
>
> 73
> Frank
> W3LPL
>
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net On
> Behalf Of Mister Mike
> Sent: Saturday, December 12, 2020 9:42 AM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] Tuning Random-Length Wire Antenna
inal Message-
>> From: elecraft-boun...@mailman.qth.net On
>> Behalf Of Mister Mike
>> Sent: Saturday, December 12, 2020 9:42 AM
>> To: elecraft@mailman.qth.net
>> Subject: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal
>> Tuner??
>>
>> What i
A matched conditon does NOT prevent the components of the tuner from
seeing high voltages and/or high currents. Check out TLW ... the
transmission line application that comes free with the ARRL Antenna
Book. Pick a load that gives a high SWR and then click on the "Tuner"
button for the appl
Of course there are high voltages or currents in some tuning solutions. Why do
people think the Elecraft ATU would not be designed to handle those?
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Dec 12, 2020, at 7:36 PM, David Gilbert wrote:
>
>
> A matche
.
73
Frank
W3LPL
- Original Message -
From: "Mister Mike"
To: donov...@erols.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, December 13, 2020 1:04:26 AM
Subject: Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal
Tuner??
That is pretty much what I
Seriously?? Why do you think that Elecraft's tuners (like just about
every other one) have max power ratings that differ depending upon the
SWR? For example, for the KAT500 has a max power rating of 1000 watts
into a 3:1 SWR but only a 600 watt rating into a 10:1 SWR??? It can
match both S
The point is that protection is built into the tuner & the firmware to
take care of extreme instances. As I recall, one release a few years
back stated that it will handle the parting of an antenna wire while
transmitting at maximum output. We can assume that a non-resonant
antenna is not cause
Regardless of what happens to the tuner, the better the untuned
match, the less power you lose in the matching network, and the
more power goes out on the air.
73 Bill AE6JV
On 12/13/20 at 10:02 AM, pu...@af2z.net (Drew AF2Z) wrote:
But as someone else has mentioned-- choose an optimal "rando
I think you just proved my point. The KAT3A does not have a lower power rating
for larger SWRs. That would indicate that it can handle the rated power over
the entire rated SWR range. If extreme SWR at full power would exceed the
component ratings, the specs would say that.
This is the entire s
age -
From: "Walter Underwood"
To: "Elecraft Reflector"
Sent: Sunday, December 13, 2020 6:45:34 PM
Subject: Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal
Tuner??
I think you just proved my point. The KAT3A does not have a lower power rating
for large
I can’t help but think we’re over-thinking this.
I think the original post was regarding ‘portable' operation. When I go
portable I don’t carry a large antenna with lots of wire or weight. I usually
carry a 41’ (non-resonant) wire with a 9:1 unun rated at 300w watts, and a
throwing line and w
I agree on the overthinking. How about the Elecraft AX1 ant? All you need
extra is coax and a tripod. It takes me 10-15 min max to get on the air. The
only limitation is no 80, 60 and 10 meters Sorta works on these bands if you
play with the whip and use the ATU. YMMV 73Jim Hk7sss. In a messag
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