Re: Qmx transceiver by Qrp Labs
Joy, I would use anything that is resonate on 20m.? I used Chelegance MC-750 and the Chinese copy.? Both full sized 1/4 wave verticals worked very well, less than 1.2:1 swr.
?
DONT USE ELECRAFT AX1
?
let me know how it goes
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Eric, darn, sorry to miss you.? Today I had lunch with old Tandem DSM folks, now I'm heading for Baylands.?
On August 2, 2024 11:18:29 AM PDT, "Eric via groups.io" <gliderboy1955@...> wrote:
Hi Gang,
I'm having some difficulties this morning and won't make it.? Have a good lunch, and great propagation! 73, Eric NF6S
ex WD6DBM
?
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Re: Qmx transceiver by Qrp Labs
I have one. My husband built it.
?
I have a QCX mini 20 M that I built 95% of with his supervision. If a part was too close to a surface mount part I would let him solder it because I was afraid of ruining it.?
?
When I had finished the QCX mini, ?before I put the case on, I connected it to my home antenna. I was wondering if I could hear anything. I heard Steve WG0AT and called him. He came right back to me right away and we made the qso. I sent him an email because I was so thrilled that the radio I had built worked and that I had gotten him as my first qso on it. He sent me a nice return email with an audio file of our qso.?
?
I have not used the QMC because I'm not sure what portable antenna I should use. Any suggestions?
?
Joy
N6GO
?
?
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Hi Gang,
I'm having some difficulties this morning and won't make it.? Have a good lunch, and great propagation! 73, Eric NF6S
ex WD6DBM
?
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Qmx transceiver by Qrp Labs
I received mine this week from Tommy Gober, N5DUX who built it for me (eyes don't work like they used to).
?
First impressions it's a real winner.? More later.? Anyone else have one??
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I plan to come... Dave W6VYC?
On Wed, Jul 31, 2024 at 15:43, Eric via groups.io <gliderboy1955@...> wrote: Planning to go, this time trying kh1 73, Eric NF6S
ex WD6DBM
? On Wed, Jul 31, 2024 at 12:54 PM, Hiroki Kato <hiroki@...> wrote: I will be at the Baylands.? Who else is coming?
Hiroki AH6CY
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Planning to go, this time trying kh1 73, Eric NF6S
ex WD6DBM
?
On Wed, Jul 31, 2024 at 12:54 PM, Hiroki Kato <hiroki@...> wrote: I will be at the Baylands.? Who else is coming?
Hiroki AH6CY
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I will be at the Baylands. Who else is coming?
Hiroki AH6CY
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Re: A novel remote controller for a magnetic loop antenna
Howard et al,
I extended the connecting wires between the two motors to 6 feet. It works very well without any discernible loss of power. I have no need to build any longer wires for my own need but it would be an interesting experiment to see how long the wires can be extended without losing the utility. This reminds me of the effort more than a century ago to find out how long telegraph wires could be extended without a relay. In theory, you can calculate by measuring resistance of wire material and how much power you need to turn the motor but in this case a raw empirical method would be much more practical, i.e., cut and try.
Hiroki AH6CY?
toggle quoted message
Show quoted text
On Jul 29, 2024, at 16:46, sittners <sittners@...> wrote:
?
Guys-
It appears that the stepper motors are acting just like the old
servo motors but have the advantage of being both readily
available and cheap. That's good to know.
Phil
On 7/29/2024 12:31 PM, Eric via
groups.io wrote:
I saw
it with my own eyes and still don't believe it.? Spooky action
through a cable.
73, Eric NF6S
ex WD6DBM
?
On Mon, Jul 29, 2024 at 10:31 AM, HOWARD POMERANTZ
Very clever Hiroki. Do you know the max distance the
induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32
AM, Hiroki Kato < hiroki@...>
wrote:
While
taking apart a 3D printer recently, our friend Jeff
Reagan, AJ6WX, discovered an interesting
electro-mechanical?phenomenon. When you connect
two?identical stepper motors in parallel and
manually turn one motor the other motor
turns?exactly the same way, clockwise or
counter-clockwise. One motor works as an electric
power generator and the power thus generated is
sufficient to turn the other motor. Jeff thought
that?such a two-motor combination may work to built
a?remote?control system for a?magnetic loop. He gave
me the two motors from his canniibalized 3D printer
for me to experiment.
I
built a prototype this week and field-tested it
yesterday. Here it is. Every part of this
construction is from my junk box. The reduction gear
is from a WWII military radio BC348's dial
mechanism. ?The capacitor is a vintage butterfly
capacitor about 60 pf. ?A discerning eye may notice
Erector parts, my favorite old-timer's 3D printer.
The antenna covers 17, 15, 12 and 10m. The remote
control worked smoothly and easy to use.?
Hiroki
AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Glad to help, Doug! 73, Eric NF6S
ex WD6DBM
?
On Mon, Jul 29, 2024 at 8:21 PM, Doug Hendricks <ki6ds1@...> wrote: Eric your very generous raspberry pi donation arrived today.? ?Thank you for your kindness and we will make sure it finds a good home.
?
Guys, Eric donated a complete Raspberry Pi 3 CanaKit to Tommy Gober, N5DUX who works with the ARRL Teacher Institute.? ?Tommy is collecting Raspberry Pis and RTL-SDR dongles to do a pilot program to put WSPR Reporting stations in schools.?
?
Thank you again,? Eric.? Yes, I? am still accepting equipment.? ?Doug,? KI6DS?
|
Eric your very generous raspberry pi donation arrived today.? ?Thank you for your kindness and we will make sure it finds a good home.
?
Guys, Eric donated a complete Raspberry Pi 3 CanaKit to Tommy Gober, N5DUX who works with the ARRL Teacher Institute.? ?Tommy is collecting Raspberry Pis and RTL-SDR dongles to do a pilot program to put WSPR Reporting stations in schools.?
?
Thank you again,? Eric.? Yes, I? am still accepting equipment.? ?Doug,? KI6DS?
|
Re: A novel remote controller for a magnetic loop antenna
Guys-
It appears that the stepper motors are acting just like the old
servo motors but have the advantage of being both readily
available and cheap. That's good to know.
Phil
On 7/29/2024 12:31 PM, Eric via
groups.io wrote:
toggle quoted message
Show quoted text
I saw
it with my own eyes and still don't believe it.? Spooky action
through a cable.
73, Eric NF6S
ex WD6DBM
?
On Mon, Jul 29, 2024 at 10:31 AM, HOWARD POMERANTZ
Very clever Hiroki. Do you know the max distance the
induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32
AM, Hiroki Kato < hiroki@...>
wrote:
While
taking apart a 3D printer recently, our friend Jeff
Reagan, AJ6WX, discovered an interesting
electro-mechanical?phenomenon. When you connect
two?identical stepper motors in parallel and
manually turn one motor the other motor
turns?exactly the same way, clockwise or
counter-clockwise. One motor works as an electric
power generator and the power thus generated is
sufficient to turn the other motor. Jeff thought
that?such a two-motor combination may work to built
a?remote?control system for a?magnetic loop. He gave
me the two motors from his canniibalized 3D printer
for me to experiment.
I
built a prototype this week and field-tested it
yesterday. Here it is. Every part of this
construction is from my junk box. The reduction gear
is from a WWII military radio BC348's dial
mechanism. ?The capacitor is a vintage butterfly
capacitor about 60 pf. ?A discerning eye may notice
Erector parts, my favorite old-timer's 3D printer.
The antenna covers 17, 15, 12 and 10m. The remote
control worked smoothly and easy to use.?
Hiroki
AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: A novel remote controller for a magnetic loop antenna
This idea has been around for more than a century.??
When I was just getting into the hobby, there were articles about using synchro or selsyn motors as antenna rotors.? The motors used to show up occasionally at army surplus stores.
On Monday, July 29, 2024 at 12:32:08 PM PDT, Eric via groups.io <gliderboy1955@...> wrote:
I saw it with my own eyes and still don't believe it.? Spooky action through a cable. 73, Eric NF6S
ex WD6DBM
?
On Mon, Jul 29, 2024 at 10:31 AM, HOWARD POMERANTZ <HOWPOM@...> wrote: Very clever Hiroki. Do you know the max distance the induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32 AM, Hiroki Kato < hiroki@...> wrote:
While taking apart a 3D printer recently, our friend Jeff Reagan, AJ6WX, discovered an interesting electro-mechanical?phenomenon. When you connect two?identical stepper motors in parallel and manually turn one motor the other motor turns?exactly the same way, clockwise or counter-clockwise. One motor works as an electric power generator and the power thus generated is sufficient to turn the other motor. Jeff thought that?such a two-motor combination may work to built a?remote?control system for a?magnetic loop. He gave me the two motors from his canniibalized 3D printer for me to experiment.
I built a prototype this week and field-tested it yesterday. Here it is. Every part of this construction is from my junk box. The reduction gear is from a WWII military radio BC348's dial mechanism. ?The capacitor is a vintage butterfly capacitor about 60 pf. ?A discerning eye may notice Erector parts, my favorite old-timer's 3D printer. The antenna covers 17, 15, 12 and 10m. The remote control worked smoothly and easy to use.?
Hiroki AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: A novel remote controller for a magnetic loop antenna
I actually tried it and can attest to its magic! As to Joy's comment, Edison said that to invent, you need a good imagination and a pile of junk... Hiroki clearly has both!
|
Re: A novel remote controller for a magnetic loop antenna
I saw it with my own eyes and still don't believe it.? Spooky action through a cable. 73, Eric NF6S
ex WD6DBM
?
On Mon, Jul 29, 2024 at 10:31 AM, HOWARD POMERANTZ <HOWPOM@...> wrote: Very clever Hiroki. Do you know the max distance the induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32 AM, Hiroki Kato < hiroki@...> wrote:
While taking apart a 3D printer recently, our friend Jeff Reagan, AJ6WX, discovered an interesting electro-mechanical?phenomenon. When you connect two?identical stepper motors in parallel and manually turn one motor the other motor turns?exactly the same way, clockwise or counter-clockwise. One motor works as an electric power generator and the power thus generated is sufficient to turn the other motor. Jeff thought that?such a two-motor combination may work to built a?remote?control system for a?magnetic loop. He gave me the two motors from his canniibalized 3D printer for me to experiment.
I built a prototype this week and field-tested it yesterday. Here it is. Every part of this construction is from my junk box. The reduction gear is from a WWII military radio BC348's dial mechanism. ?The capacitor is a vintage butterfly capacitor about 60 pf. ?A discerning eye may notice Erector parts, my favorite old-timer's 3D printer. The antenna covers 17, 15, 12 and 10m. The remote control worked smoothly and easy to use.?
Hiroki AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: A novel remote controller for a magnetic loop antenna
?Howard,
There is no solenoid, just two stepper motors connected in parallel. I have not tested how long the connecting wires can be. As it is, it is only 3 feet or so, but I expect that I can easily extend it to 10 to 15 feet without losing significant amount of electric energy. I would not need any more length than that.
I experimented with other stepper motors of various size (meant to work with 12V-24V) ?in my junk box. They all worked when connected in parallel with varying torque.?
Perhaps someone can commercialize this system of remote-controlling a mag loop. There are some commercial remote controllers, including the one by Alex Bromberg, but they are expensive. My system can be produced for well under $30 (not including the antenna).
Hiroki AH6CY
toggle quoted message
Show quoted text
On Jul 29, 2024, at 10:31 AM, HOWARD POMERANTZ <HOWPOM@...> wrote:
Very clever Hiroki. Do you know the max distance the induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32 AM, Hiroki Kato < hiroki@...> wrote:
While taking apart a 3D printer recently, our friend Jeff Reagan, AJ6WX, discovered an interesting electro-mechanical?phenomenon. When you connect two?identical stepper motors in parallel and manually turn one motor the other motor turns?exactly the same way, clockwise or counter-clockwise. One motor works as an electric power generator and the power thus generated is sufficient to turn the other motor. Jeff thought that?such a two-motor combination may work to built a?remote?control system for a?magnetic loop. He gave me the two motors from his canniibalized 3D printer for me to experiment.
I built a prototype this week and field-tested it yesterday. Here it is. Every part of this construction is from my junk box. The reduction gear is from a WWII military radio BC348's dial mechanism. ?The capacitor is a vintage butterfly capacitor about 60 pf. ?A discerning eye may notice Erector parts, my favorite old-timer's 3D printer. The antenna covers 17, 15, 12 and 10m. The remote control worked smoothly and easy to use.?
Hiroki AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: A novel remote controller for a magnetic loop antenna
Those were 24 volt motors. They may have longer reach than lower voltage models.
On Mon, Jul 29, 2024 at 10:31?AM HOWARD POMERANTZ via <HOWPOM= [email protected]> wrote: Very clever Hiroki. Do you know the max distance the induction solenoids(?) will reach? Just curious
On Jul 27, 2024, at 7:32 AM, Hiroki Kato < hiroki@...> wrote:
While taking apart a 3D printer recently, our friend Jeff Reagan, AJ6WX, discovered an interesting electro-mechanical?phenomenon. When you connect two?identical stepper motors in parallel and manually turn one motor the other motor turns?exactly the same way, clockwise or counter-clockwise. One motor works as an electric power generator and the power thus generated is sufficient to turn the other motor. Jeff thought that?such a two-motor combination may work to built a?remote?control system for a?magnetic loop. He gave me the two motors from his canniibalized 3D printer for me to experiment.
I built a prototype this week and field-tested it yesterday. Here it is. Every part of this construction is from my junk box. The reduction gear is from a WWII military radio BC348's dial mechanism.? The capacitor is a vintage butterfly capacitor about 60 pf.? A discerning eye may notice Erector parts, my favorite old-timer's 3D printer. The antenna covers 17, 15, 12 and 10m. The remote control worked smoothly and easy to use.?
Hiroki AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: A novel remote controller for a magnetic loop antenna
Very clever Hiroki. Do you know the max distance the induction solenoids(?) will reach? Just curious
toggle quoted message
Show quoted text
On Jul 27, 2024, at 7:32 AM, Hiroki Kato < hiroki@...> wrote:
While taking apart a 3D printer recently, our friend Jeff Reagan, AJ6WX, discovered an interesting electro-mechanical?phenomenon. When you connect two?identical stepper motors in parallel and manually turn one motor the other motor turns?exactly the same way, clockwise or counter-clockwise. One motor works as an electric power generator and the power thus generated is sufficient to turn the other motor. Jeff thought that?such a two-motor combination may work to built a?remote?control system for a?magnetic loop. He gave me the two motors from his canniibalized 3D printer for me to experiment.
I built a prototype this week and field-tested it yesterday. Here it is. Every part of this construction is from my junk box. The reduction gear is from a WWII military radio BC348's dial mechanism. ?The capacitor is a vintage butterfly capacitor about 60 pf. ?A discerning eye may notice Erector parts, my favorite old-timer's 3D printer. The antenna covers 17, 15, 12 and 10m. The remote control worked smoothly and easy to use.?
Hiroki AH6CY
<IMG_6661.jpeg>
<IMG_6667.jpeg>
|
Re: BEYOND THE BEACON: CONRAD DISCOVERS THE UNEXPECTED BENEFITS OF WSPR
Joy,
Thanks for forwarding the article. Using WSPR is like having thousands of field strength meters scattered at different distances at the same time. I cannot think of a better way of measuring the efficiency of antennas as well as checking the propagation condition in real time.
By all means you should start using your ZachTek and have it running 24/7, like Dave C. and I do.
Hiroki AH6CY?
toggle quoted message
Show quoted text
On Jul 28, 2024, at 09:11, Joy Rabins <doghouse3@...> wrote:
? This is an article from qrper.com on the benefits of WSPR. It's really interesting. Hiroki, I think you will enjoy this article. ?I think this might get me to re-connect my Zach Tek transmitter.?
?
?
?
Joy
N6GO
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Cliff Sojourner K6CLS
David W Crocker
David
Jeff Reagan