[Elecraft] Err message with K POD and KPA500

[Don Minkoff]

I am also seeing an error message when transmitting.  Everything is 
working OK but I get a flash of ERR K1.  Didn't notice that  a few weeks 
ago in the CQP but it is there now in the CQWWSSB. Using a K3 to a 
KPA500 and KAT500. I will disconnect the K-Pod and try again. Running N1MM.


--
Don Minkoff
NK6A

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] P3 wonky on 30 meters

[Bob Novas]

On 30 meters, and only on 30 meters, the P3 display does not agree with the
signals that the K3S receives. It's wrong by about 20 or 30 KHz. In other
words, where the P3 says there's signal, I hear nothing, but if I tune up
about 20-30KHz, I hear a signal that I think is what's on the P3.  Any
advice? Thanks, Bob W3Dk.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) - looking for testers

[kevino z]

Joe, it seemed to fix it for the K3S at work. I'll do some more testing Monday. 
Please send detailed steps you performed and I'll emulate and report back. 
-Kevin (KK4YEL) 

No trees were killed in the sending of this message. However, a large number of 
electrons were terribly inconvenienced !

> On Oct 28, 2016, at 15:48, Joe Subich, W4TV  wrote:
> 
> 
>> On 10/28/2016 12:03 PM, Jim - N4ST wrote:
>> Alas, I downloaded the K3S Beta 5.65B software and installed it, but it did
>> NOT fix the muting problem for me when operating split mode with WJST-X.
> 
> In which case, HRD is probably sending some other command that changes
> DSP settings during transmit.  You will probably need to document what
> commands HRD is generating in response to WSJT-X and work with Elecraft
> to determine which of those commands results in DSP changes.  The 5.56
> beta changes were in response to documentation of commands by Commander
> and another software package with the K3.
> 
> I'd start with all commands from about 2 seconds before x:00 until x:05
> since HRD is so unpredictable and commands could be delayed or out of
> order.
> 
> *Any* application should know not to change things like split status,
> mode (including data sub-mode), sideband, transmit VFO, etc. while
> in transmit - whether directly or via an intermediary like Commander
> or HRD but, as we've seen, application programmers tend to be sloppy
> and not consider how the rig will react.
> 
> 73,
> 
>   ... Joe, W4TV
> 
> 
> 
>> I was using WSJT-X 1.7 dev 7005.
>> I dropped back to the public release WSJT-X 1.6 and that did not work
>> either.
>> Using HRD 6.3.0.585
>> 
>> 
>> 73,
>> Jim - N4ST
>> 
>> 
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
>> Burdick
>> Sent: Thursday, October 27, 2016 12:10
>> To: Elecraft Reflector 
>> Subject: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) -
>> looking for testers
>> 
>> Hi all,
>> 
>> We're looking for volunteers to test the latest K3 field-test firmware.
>> Please review the recent release notes below.
>> 
>> If you'd like to do testing because you'll be affected by these changes, or
>> if you're just interested in helping us qualify the firmware for beta
>> release, please contact me directly.
>> 
>> 73,
>> Wayne
>> N6KR
>> 
>> * * *
>> 
>> K3 MCU 5.56 / DSP 2.88 / FPF 1.26, 10-26-2016
>> 
>> * SCANNING WORKS WITH FREQUENCIES BELOW 1.0 MHz. Previously, scanning would
>> stall in this case.
>> 
>> * REDUCED K-POD MACRO FLASH TIME:  If text decode is enabled, then the
>> length of time that K-Pod macro names are flashed is greatly reduced. This
>> reduces the obstruction of text shown on VFO B.
>> 
>> * DT, FR, and FT HOST COMMANDS DISALLOWED IN TX MODE: Previously, these
>> commands (data submode, split off, and split on) could be sent to the K3
>> during transmit from software applications. This could sometimes cause side
>> effects such as muting of transmit audio in DATA modes.
>> 
>> K3 MCU 5.55 / DSP 2.88 / FPF 1.26, 10-20-2016
>> 
>> * KPOD WORKS IN REMOTE-RIG TERMINAL MODE:  The K-Pod will now function
>> correctly with a K3 or K3/0-mini being used as a remote-rig terminal. Basic
>> functions of the K-Pod can be used, including switch tap / hold and VFO
>> A/B/offset control. LEDs and AUX outputs of the terminal K-Pod are not yet
>> supported. Note:  At present, when switches on the terminal K-Pod are used,
>> they will execute macros stored at the remote K3. This will be apparent when
>> macro names are flashed on VFO B.
>> 
>> 
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html Message
>> delivered to hamsh...@n4st.com
>> 
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to li...@subich.com
>> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to z_kev...@hotmail.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: 

[Elecraft] K3-10 Rx sensitivity update

[Allen Bush via Elecraft]

Update on K3-10 Rx sensitivity problem . found the culprit.  The single 
standoff for the corner of the KANT3 board was loose between the standoff and 
the T connector by about a turn.  Wiggling the board around caused the noise to 
come and go.  Tightening the standoff cured the problemAllen, W0OUU
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Magnetic Loop Performance

[Morgan Bailey]

First off, Is your loop 48 inches diameter or total circumference of 48
inches?

Second, is your cap a butterfly cap. Those camps make a huge difference in
performance. Although I have successfully used a double ganged cap with
excellent results.

Using a toroid to connect the loop with the turns on the toroid and the
pipe going through the loop may be a better set up.

Spacing on the coil turns and contact with the loop will change
dramatically and I would highly recommend a faraday loop for
feeding/driving the loop. make this coil/loop a circle with diameter 1/5
the diameter of the loop. For a 48 inch diameter loop that would be about
9.5 inches diameter. My loop worked great with a 1/4 inch copper tube 1/5
the diameter of the main loop fed directly across the coax, that is, braid
on one side center on the other. I adjusted the matching by moving the loop
up and down on the central axis. It worked great and would take 350 watts
with out heating up, providing the resonant frequency of the loop was
matched with the capacitor. My cap was rated at 2500 voltage break down.

You might consider a gamma match with your loop, Although this will make
the loop favor one side over the other but only marginally.

Personally, I have never had much luck with just turns on wire on the loop
to make it work. I know it is in the literature but it never worked
repeatability for me because of the variability of the construct.

I never used a 1to1 balun on any of my loops. And never got kissed by RF
coming back at me. I could see that a wire wound choke balun may introduce
inductance in the match and cause problems where as a bead balun may not
cause problems.

Also you are expecting way to much from this loop. Loops only work well for
1 maybe 2 bands at a time. This is limited by the variability of the
capacitor and the inter capacitance of the construct. As you go up in
frequency your need way way less capacitance and soon your loop will be
unmatchable. Your 48 inch loop makes the conductor length of 12.5 feet.
This is way big for 15 meters because it is greater than a 1/4 wave at that
frequency and loops only function as a loop if they are a fraction of a
quarter wave in frequency. You loop, if it is 48 inches in diameter is
ideal for 30 and 20 meters and with the right capacitor will be usable on
40 with reasonable efficiency.  A 2.5 foot diameter loop for the high bands
is more in the ideal range for 20-10 meter operation. Because the total
circumference of the loop is only 8 feet which is shorter than a 1/4 wave
at the lowest frequency, 28 mhz. A loop this size will best work on 15-10
 meters and will be matchable to work with decreased efficiency on 20. It
calculates to about 48 % on 20 with all the other values much higher in
efficiency as the frequency goes up. The Problem is with the matching
capacitor minimum and maximum values and the intrinsic capacitance of the
total system changing the resonance. Finding capacitors has always been the
weak point in Loop construction. Vacuum variables with high Q values are
the best widest frequency solution and can run the most power to the
antenna because of their high voltage break down.  The problem is the
fragility and the cost factor of the capacitor. I shopped EBAY and found
air variable double gang or butterfly caps that would work over a wide
value of frequency for pennies  compared to the dollars spent on vacuum
variables, and for less than 100 watts, worked quite well.

This website has helped me immeasurabley when I was constructing loops. For
me this was the best calculator and guide to construction.

 http://www.66pacific.com/calculators/small_tx_loop_calc.aspx

Vy 73,

Morgan Bailey NJ8M



On Mon, Oct 24, 2016 at 7:22 PM, johnpierce  wrote:

> I could use some help with a MagLoop.  I constructed a 48" loop from 3.8"
> copper pipe.  I have a 51 pf capacitor across the open end of the loop.  I
> am feeding the loop with a 4 turn coil around the copper pipe opposite of
> the capacitor.  Before checking the loop I tested a carbon resistor on the
> balun (ant side).  Using a 50ohm resistor on the ant side of a 1:1 Balun
> which was fed with a 2' piece of 50 ohm coax and with the loop disconnected
> I get the following readings from a MFJ 259B antenna analyzer:
>
>
>
> Freq  Resistance  X
>
> 9.7mhz 66ohm0
>
> 10  680
>
> 12  770
>
> 14  890
>
> 17  109  0
>
> 21  126  0
>
> 27  128  0
>
> 27.6   780
>
>
>
> Reattaching the feed coil and the balun I get the following readings
>
> Freq  Resistance  X
>
> 9.7mhz 18ohm77
>
> 10  2081
>
> 12  43119
>
> 15  163  203
>
> 16  303 

Re: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) - looking for testers

[Joe Subich, W4TV]

On 10/28/2016 12:03 PM, Jim - N4ST wrote:

Alas, I downloaded the K3S Beta 5.65B software and installed it, but it did
NOT fix the muting problem for me when operating split mode with WJST-X.


In which case, HRD is probably sending some other command that changes
DSP settings during transmit.  You will probably need to document what
commands HRD is generating in response to WSJT-X and work with Elecraft
to determine which of those commands results in DSP changes.  The 5.56
beta changes were in response to documentation of commands by Commander
and another software package with the K3.

I'd start with all commands from about 2 seconds before x:00 until x:05
since HRD is so unpredictable and commands could be delayed or out of
order.

*Any* application should know not to change things like split status,
mode (including data sub-mode), sideband, transmit VFO, etc. while
in transmit - whether directly or via an intermediary like Commander
or HRD but, as we've seen, application programmers tend to be sloppy
and not consider how the rig will react.

73,

   ... Joe, W4TV




I was using WSJT-X 1.7 dev 7005.
I dropped back to the public release WSJT-X 1.6 and that did not work
either.
Using HRD 6.3.0.585


73,
Jim - N4ST


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Thursday, October 27, 2016 12:10
To: Elecraft Reflector 
Subject: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) -
looking for testers

Hi all,

We're looking for volunteers to test the latest K3 field-test firmware.
Please review the recent release notes below.

If you'd like to do testing because you'll be affected by these changes, or
if you're just interested in helping us qualify the firmware for beta
release, please contact me directly.

73,
Wayne
N6KR

* * *

K3 MCU 5.56 / DSP 2.88 / FPF 1.26, 10-26-2016

* SCANNING WORKS WITH FREQUENCIES BELOW 1.0 MHz. Previously, scanning would
stall in this case.

* REDUCED K-POD MACRO FLASH TIME:  If text decode is enabled, then the
length of time that K-Pod macro names are flashed is greatly reduced. This
reduces the obstruction of text shown on VFO B.

* DT, FR, and FT HOST COMMANDS DISALLOWED IN TX MODE: Previously, these
commands (data submode, split off, and split on) could be sent to the K3
during transmit from software applications. This could sometimes cause side
effects such as muting of transmit audio in DATA modes.

K3 MCU 5.55 / DSP 2.88 / FPF 1.26, 10-20-2016

* KPOD WORKS IN REMOTE-RIG TERMINAL MODE:  The K-Pod will now function
correctly with a K3 or K3/0-mini being used as a remote-rig terminal. Basic
functions of the K-Pod can be used, including switch tap / hold and VFO
A/B/offset control. LEDs and AUX outputs of the terminal K-Pod are not yet
supported. Note:  At present, when switches on the terminal K-Pod are used,
they will execute macros stored at the remote K3. This will be apparent when
macro names are flashed on VFO B.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to hamsh...@n4st.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to li...@subich.com


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] K3 RX Problem

[Allen Bush via Elecraft]

I just purchased a new to me K3-10 S/N 501.  I have discovered it has a RX 
sensitivity problem.  After some troubleshooting, I have discovered that the RX 
is not low on sensitivity (about .25 uV) but has a high noise level when 
receiving thru the ANT 1 or 2 ports.  The background noise with no antenna 
connected is 10 dB higher on the TX/RX ports than when it is receiving thru the 
RX only ports.  Possibly this is related to the PIN diode antenna switch?  Has 
anyone on the list experienced this?  Thanks!  Allen, W0OUU
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] White noise in headphones with beta firmware

[Tony Marr]

Enrico,

 

I assume you're referring to firmware 5.54. I am using this and have no
problem with it. I am not experiencing the white noise you mention. Perhaps
you should revert to your previous firmware to check out your radio? Good
luck.

73, Tony ZL2AGY.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Error in KX2 Owner's Manual

[Wayne Burdick]

So noted. Thanks!

Wayne
N6KR

On Oct 28, 2016, at 9:02 AM, Emory Schley  wrote:

> 
> Is there someone we should report Owner's Manual errors to?
>  
> On page 15 of the KX2 Owner's Manual, the chart lists the 30-meter band as 
> covering 10.0-10.150, which is inaccurate. The amateur radio portion is 
> actually 10.1-10.150... hope no one goes out of band because of this.
>  
> Emory Schley
> N4LP
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n...@elecraft.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] [K3] SOLD

[Gregory Lamb]

My K3 has been sold.

Thanks again to the many who expressed interest.

W9SDX, Greg

w9...@arrl.net
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Error in KX2 Owner's Manual

[Emory Schley]

Is there someone we should report Owner's Manual errors to?
 
On page 15 of the KX2 Owner's Manual, the chart lists the 30-meter band as 
covering 10.0-10.150, which is inaccurate. The amateur radio portion is 
actually 10.1-10.150... hope no one goes out of band because of this.
 
Emory Schley
N4LP
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) - looking for testers

[Jim - N4ST]

Alas, I downloaded the K3S Beta 5.65B software and installed it, but it did
NOT fix the muting problem for me when operating split mode with WJST-X.
I was using WSJT-X 1.7 dev 7005.
I dropped back to the public release WSJT-X 1.6 and that did not work
either.
Using HRD 6.3.0.585

 
73,
Jim - N4ST


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Thursday, October 27, 2016 12:10
To: Elecraft Reflector 
Subject: [Elecraft] New K3 firmware with minor bug fixes (rev. 5.56) -
looking for testers

Hi all,

We're looking for volunteers to test the latest K3 field-test firmware.
Please review the recent release notes below.

If you'd like to do testing because you'll be affected by these changes, or
if you're just interested in helping us qualify the firmware for beta
release, please contact me directly.

73,
Wayne
N6KR

* * *

K3 MCU 5.56 / DSP 2.88 / FPF 1.26, 10-26-2016

* SCANNING WORKS WITH FREQUENCIES BELOW 1.0 MHz. Previously, scanning would
stall in this case.

* REDUCED K-POD MACRO FLASH TIME:  If text decode is enabled, then the
length of time that K-Pod macro names are flashed is greatly reduced. This
reduces the obstruction of text shown on VFO B.

* DT, FR, and FT HOST COMMANDS DISALLOWED IN TX MODE: Previously, these
commands (data submode, split off, and split on) could be sent to the K3
during transmit from software applications. This could sometimes cause side
effects such as muting of transmit audio in DATA modes.

K3 MCU 5.55 / DSP 2.88 / FPF 1.26, 10-20-2016

* KPOD WORKS IN REMOTE-RIG TERMINAL MODE:  The K-Pod will now function
correctly with a K3 or K3/0-mini being used as a remote-rig terminal. Basic
functions of the K-Pod can be used, including switch tap / hold and VFO
A/B/offset control. LEDs and AUX outputs of the terminal K-Pod are not yet
supported. Note:  At present, when switches on the terminal K-Pod are used,
they will execute macros stored at the remote K3. This will be apparent when
macro names are flashed on VFO B. 


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to hamsh...@n4st.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] white noise in headphones with beta firmware

[Enrico Lorenzoni IU3AZC]

hello, today I just updated my k3 with the latest beta firmware, so I 
could record monitor from line out.
But as soon as I applied the update, I started hearing a white noise in 
my headphones. It is indipendent from AF level.
Could you please fix the firmware so I don't have to revert and loose 
the recording ability?

thanks

--


73 de Enrico IU4AZC

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Motor for Cap in Mag Loop

[Morgan Bailey]

A stepper motor or a cheap 12 volt servo motor with a 1 to 2 rpm turn rate
hooked up with a 5 dollar circuit board that pulses the dc to the motor.
All can be had on ebay for about 40 dollars.

additionally, insulate the motor shaft from the cap shaft and mount in
plastic because the rf will mess with things. Use beads on the leads to the
motor. An antena company in Italy will send you the butterfly cap and the
controller for about 300 dollars and it is already wired and ready for a
loop. They make square loop antennas but you can buy any thing they sell
and that is the easiest way to do it and it is pretty bomb proof.

It will allow you to be away from the antenna and not near any RF. They
have the best system that is pre-fabed. Here is the link.

http://www.dolstra.nl/Antennes/HF/Magnetic%20loop/
INAC%20Loops/Inac_loops.htm

You can get the direct order from Inac from googling it.

Vy 73,

Morgan Bailey NJ8M

On Thu, Oct 27, 2016 at 10:22 PM, Morgan Bailey 
wrote:

> A stepper motor or a cheap 12 volt servo motor with a 1 to 2 rpm turn rate
> hooked up with a 5 dollar circuit board that pulses the dc to the motor.
> All can be had on ebay for about 40 dollars.
>
> additionally, insulate the motor shaft from the cap shaft and mount in
> plastic because the rf will mess with things. Use beads on the leads to the
> motor. An antena company in Italy will send you the butterfly cap and the
> controller for about 300 dollars and it is already wired and ready for a
> loop. They make square loop antennas but you can buy any thing they sell
> and that is the easiest way to do it and it is pretty bomb proof.
>
> It will allow you to be away from the antenna and not near any RF. They
> have the best system that is pre-fabed. Here is the link.
>
> http://www.dolstra.nl/Antennes/HF/Magnetic%20loop/
> INAC%20Loops/Inac_loops.htm
>
> You can get the direct order from Inac from googling it.
>
> Vy 73,
>
> Morgan Bailey NJ8M
>
>
>
> On Thu, Oct 27, 2016 at 9:06 PM, johnpierce  wrote:
>
>> I have seen general definitions about motors for driving a capacitor in
>> Mag
>> Loop.   But I have not seen a recommendation of a specific type to look
>> for
>> on Amazon or Ebay.  For starters I am looking for a 12vdc reversible
>> motor.
>> I would like to start with a simple push button system for tuning.  Maybe
>> I
>> will consider a stepper later.  I think that would need some computer
>> control.  I am also wondering what RPM to consider for use on the lowest
>> frequency (40mtrs).  The capacitor I am expecting to use would not have a
>> stop and could travel a full 360 degrees.
>>
>>
>>
>> John
>>
>> Ad2F
>>
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to mbaileyc...@gmail.com
>>
>
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Information Needed

[Arie Kleingeld PA3A]

Louis,

In my shack I have the KPA-KAT500 combo stacked permanently: KPA500 on 
top of the KAT500. It's like since I have them (2013).
During portable use (fieldday etc) the K3 is on top of that. Compact and 
easy.


See this short youtube video of the PI4D fieldday how that looks: 
https://www.youtube.com/watch?v=nAI9HKwEMxU


73
Arie PA3A

Op 28-10-2016 om 4:24 schreef louis a. ives:

I will be constructing a rack for my, K-3, KPA-500, KAT-500, P-3.  My concern 
is how much air space is needed for the equipment.  I need to rack the 
equipment to increase space on my bench. The KPA-500 will be on bottom, mainly 
because of the weight.




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Motor for Cap in Mag Loop

[Matthew Cook]

John,

Firstly build your loop with your chosen capacitor and see how much Q you
can achieve.  From there you can work out by how much (or how little!) you
have to rotate the shaft per kHz of change.   This will then dictate how
you computer control your loop.

Unfortunately you need to start at the other end of the project first and
work backwards to find the right motor and gearbox.  Transmitting loops
with high Q can be fiddly to tune and then hold in tune, especially when
they are only 3kHz wide.

73

Matthew
VK5ZM


On 28 October 2016 at 12:36, johnpierce  wrote:

> I have seen general definitions about motors for driving a capacitor in Mag
> Loop.   But I have not seen a recommendation of a specific type to look for
> on Amazon or Ebay.  For starters I am looking for a 12vdc reversible motor.
> I would like to start with a simple push button system for tuning.  Maybe I
> will consider a stepper later.  I think that would need some computer
> control.  I am also wondering what RPM to consider for use on the lowest
> frequency (40mtrs).  The capacitor I am expecting to use would not have a
> stop and could travel a full 360 degrees.
>
>
>
> John
>
> Ad2F
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to vk...@bistre.net
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com