Hello From W1VLF, I am just a guy who has many interests and has done lots of diverse and weird experiments mostly in the electronics area. Such as Laser light and LED light line of sigh and non line of sight communications, machine shop activities
Starting at about timestamp 8:10 you can see where the the B force causes the contactor to make a second closure with a smaller spark which discharges additional cap energy into the coil...looks like you are getting some LC oscillation from the cap (C) and coil (L) resonate freq.
@dalenassar915210 күн бұрын
According to your total of 6000uF @ 1000v (and if all capacitors are equal V and C) This says that the caps are rated (each) at 500v 15,000uF. since 15,000uF is rather high for blue caps...I was wondering if they are 15,000uF EACH....what is printed on them?? THANKS MUCH!!!
@dalenassar915210 күн бұрын
A dab of hot glue to the coin...and it will stick on the puck as-is. Better yet, stick the coin to the wood bottom. ...would be nice to see a puck-only launch! GREAT VIDEO!!!
@cleterjabe755814 күн бұрын
The site you want to scope out is the Mt Everett reservation in SW MA. Not sure if the fire tower is still there, and I think the road to the top is closed to vehicles, but that is one GREAT location. Of course, that means that one would have to hike to the top, and I know of two people that leaves out 🙂
@W1VLF13 күн бұрын
Your a funny funny man Cliff!!!
@w8bya17 күн бұрын
Hiya Paul. Great job documenting these locations. Not sure if I missed it but folks may want to know if you can have access during the winter. If available in the winter I bet a lot more angles will become available when all the leaves are gone. 73
@W1VLF16 күн бұрын
Yes you are correct... The damn close in foliage is a big problem..... Getting closer to getting my reflector on the tower.
@KA4UPW17 күн бұрын
Only works with radios with ferrite rod antennas? What would you recommend for q halicrafters s38 radio? 17:10
@dbailey302418 күн бұрын
i found it very interesting i now know how to tune my hf traps thankyou they should have tought this for the ham exam Dylan m0dsy
@videodude813719 күн бұрын
Shooting? What are you Shooting? You are receiving only, not transmitting. So what do you mean, "shooting"? Also, who is Anna?
@Soggytiri9 күн бұрын
There is always one.
@TheGmr14022 күн бұрын
Microwave, now we talking 😊😊
@jakebrodskype23 күн бұрын
I notice that you're pointing very close to tree leaves. Are you concerned about Fresnel Zones and the effects one might have with them?
@W1VLF23 күн бұрын
Not really at this point. The purpose of the video is just to give folks an idea of what is actually available when they are thinking of travelling to this site. Thanks for the question W1VLF
@richardjamsek708024 күн бұрын
Still waiting for antenna details from last video.
@richardcallihan974624 күн бұрын
Are there any old fire tower or telephone microwave sites around?
@W1VLF23 күн бұрын
Not on this hill, there are a number within a 5 mile radius W1VLF
@davidgilbert627 күн бұрын
Where is the comparison??
@uvebern644128 күн бұрын
I use this tape for many projects. When it's time to remove, I use a fishing line to skim between the part and the tape to separate the glue, very handy on glass (not to break) or painted parts not to peel the paint. I also find putting many patches instead of a single large continuous patch makes it easier to remove and seems to offer more tolerance to temperature variations. I leave a 2mm gap between the patches.
@guido_aka_guy28 күн бұрын
Hello I am a SDR-beginner and it would be helpful to get some information which Antenna you use to receive the DCF77 Signals. The Clocks that Decode the Time Signal use a Ferrit and some thin wire wrapped around the Ferrit Stick. But I also heard of Loop Antenna used together with SDR-stick with a Stick capable of 77,5 kHz . Could you describe your Setup please.
@stevec5000Ай бұрын
You may also want to check the resonant frequency of your coil to make sure it is higher than the frequency you are trying to pick up or you will never be able to tune it properly and that is easy to do with a signal generator and scope.
@stevec5000Ай бұрын
Will building one of these finally make my atomic clock be able to pick up a signal and work?
@stevec5000Ай бұрын
So does this actually work unlike those worthelss little loopstick antennas that Universal Solder sells that never pick up anything?
@ArnavRanjekarАй бұрын
Thank you for the wonderful video!! Could you give the values of capacitances you used and/or the range of the variable capacitor? We are making one for SID Monitoring
@migalito1955Ай бұрын
Nice demonstration. What is the loss factor indicating the loss of ??
@robincross4625Ай бұрын
I would like you to check something for me. If it is a very good square wave output, it is supposed to be the fundamental and odd harmonics. Check the signal strength of the odd vs. even harmonics. The odds should be much stronger. If they are not, that says that the fundamental is not a really good square wave. I have used TTL devices for markers and other uses. Good thinking.
@pfmcdermott1Ай бұрын
+1 Group W Bench reference! That made me smile. Thank you!
@fotografmАй бұрын
Maybe another solution would be to rip the PSU out of the monitor and replace it with something quieter. Might void the warranty though...
@fotografmАй бұрын
Excellent investigation ! I switched to using laptops as I couldn't find a way of making my monitors quiet. What is the conclusion ? Best way to supress noise is to tweak monitor orientation to null the noise ? It works but is not always practical ? Anyone have any more ideas ? I wrapped a monitor in chicken wire which worked great (see my channel) but of couse is totally impractical if you want to see what is on the screen ;-)
@stargazer7644Ай бұрын
Just a suggestion. Instead of burying the parts list 3/4 of the way into part 2 of 3, put it at the start of part 1.
@W1VLFАй бұрын
Good point noted...Thank you W1VLF
@stargazer7644Ай бұрын
Where did the sample winding come from?
@stargazer7644Ай бұрын
So just pump the tube full of glue so the parts stop moving around.
@SkySimАй бұрын
Good info.
@citizenrichАй бұрын
Thanks, awesome video.
@romjone48012 ай бұрын
How can you tell if you have 400 ferrite rods?
@debojitacharjee2 ай бұрын
*WHAT'S THE FORMULA*---I need to know the formula for building this antenna. Is is same as a simple loop antenna?
@RememberingMaryEvely2 ай бұрын
WWVB is currently operating at reduced power as high winds damaged the north antenna in January. Here in CA, my Casio watch can still receive it if I leave it outside overnight. The antenna should be repaired in a few weeks, but I was browsing for a passive solution to boost the signal. Sounds like your design might do it. I wouldn't need the 1" PVC parts. or the 10-turn coupling. I love the idea of using noise from a laptop to tune it. I'm not a ham, but I do have a Picoscope gadget that functions as an oscilloscope or spectrum analyzer using a laptop for display, etc. Serendipity!. I don't know whether I will pursue this, but I really enjoyed your video and laughed every time you mentioned the "Group W" bench. Just wish I had a lathe...
@tonychristoph10632 ай бұрын
👍👍👍
@fasnuf2 ай бұрын
My inverters make harmonic QRM on 20M about every 90khz. This video told me it will only null one selected and not all. Thanks.
@stargazer76442 ай бұрын
I keep looking for the parts list and not finding it - specifically what ferrite are you using? Good grief 23:12
@SB-mi2ii2 ай бұрын
Today I managed to locate the rfi which was interfering with my sdr and Belka, and it turned out to be my monitor, exactly the same one as in your video! Having found the source I searched on the internet for solutions, but you don't give one. Can anything be done in the case of monitor-generated rfi?
@michaelnoardo33152 ай бұрын
do you have a comparation of those loop vs a long wire H or Vertical ?
@dmsadigitalmediaservicesar25862 ай бұрын
Hey thanks, what a great illustration of this function, Straight to the point, minimal bloat content.
@dmsadigitalmediaservicesar25862 ай бұрын
Why not a sine wave instead of the little portable radio? Am I misunderstanding something about the inherent process in the single processing variables?
@Tolky482 ай бұрын
We live on the ground floor and the electrical panel is right next to us in the apartment. I think this creates more noise. I am a bass baritone. My voice range is 100 Hz. When I use a switched psu, I can hear this noise as a fog curtain while listening to music and in my voice recordings. When I use a power protected psu, the sound is clearer and more vivid. It happens. I will buy a 7 inch mini monitor in my recording studio and try it by feeding it with a protected PSU.
@JohnDoe-mg7ht2 ай бұрын
What would happen if you made a series vs. parallel LC circuit for these passive receiving antennas? I know that for the WWVB-spoofing antenna I built, I used a series LC circuit since the transmit antenna is powered by an ESP32 GPIO output and by using a series circuit, I could assure that the reactance was minimum at the resonant frequency so there would be little chance of drawing too much current on power-up or power-down since the reactance out of resonance would be higher. But for a passive receiving antenna where one is not pumping current into the antenna, does it make a difference whether parallel or series?
@alainbroekema50002 ай бұрын
Interesting video, Thank you !
@mehamrdio61732 ай бұрын
Thanks!
@JustinRuth-km4wz2 ай бұрын
Too much noise inducing the loop its needs more filtering needs to be notched ...its eay to noisy
Пікірлер
Thank you for your practical explanation!
Glad it was helpful! W1VLF
What decoding software were you using?
Jaaero jontio.zapto.org/hda1/jaero.html
Excellent video, thank you!
Thank you ! Appreciate your comment W1VLF
Starting at about timestamp 8:10 you can see where the the B force causes the contactor to make a second closure with a smaller spark which discharges additional cap energy into the coil...looks like you are getting some LC oscillation from the cap (C) and coil (L) resonate freq.
According to your total of 6000uF @ 1000v (and if all capacitors are equal V and C) This says that the caps are rated (each) at 500v 15,000uF. since 15,000uF is rather high for blue caps...I was wondering if they are 15,000uF EACH....what is printed on them?? THANKS MUCH!!!
A dab of hot glue to the coin...and it will stick on the puck as-is. Better yet, stick the coin to the wood bottom. ...would be nice to see a puck-only launch! GREAT VIDEO!!!
The site you want to scope out is the Mt Everett reservation in SW MA. Not sure if the fire tower is still there, and I think the road to the top is closed to vehicles, but that is one GREAT location. Of course, that means that one would have to hike to the top, and I know of two people that leaves out 🙂
Your a funny funny man Cliff!!!
Hiya Paul. Great job documenting these locations. Not sure if I missed it but folks may want to know if you can have access during the winter. If available in the winter I bet a lot more angles will become available when all the leaves are gone. 73
Yes you are correct... The damn close in foliage is a big problem..... Getting closer to getting my reflector on the tower.
Only works with radios with ferrite rod antennas? What would you recommend for q halicrafters s38 radio? 17:10
i found it very interesting i now know how to tune my hf traps thankyou they should have tought this for the ham exam Dylan m0dsy
Shooting? What are you Shooting? You are receiving only, not transmitting. So what do you mean, "shooting"? Also, who is Anna?
There is always one.
Microwave, now we talking 😊😊
I notice that you're pointing very close to tree leaves. Are you concerned about Fresnel Zones and the effects one might have with them?
Not really at this point. The purpose of the video is just to give folks an idea of what is actually available when they are thinking of travelling to this site. Thanks for the question W1VLF
Still waiting for antenna details from last video.
Are there any old fire tower or telephone microwave sites around?
Not on this hill, there are a number within a 5 mile radius W1VLF
Where is the comparison??
I use this tape for many projects. When it's time to remove, I use a fishing line to skim between the part and the tape to separate the glue, very handy on glass (not to break) or painted parts not to peel the paint. I also find putting many patches instead of a single large continuous patch makes it easier to remove and seems to offer more tolerance to temperature variations. I leave a 2mm gap between the patches.
Hello I am a SDR-beginner and it would be helpful to get some information which Antenna you use to receive the DCF77 Signals. The Clocks that Decode the Time Signal use a Ferrit and some thin wire wrapped around the Ferrit Stick. But I also heard of Loop Antenna used together with SDR-stick with a Stick capable of 77,5 kHz . Could you describe your Setup please.
You may also want to check the resonant frequency of your coil to make sure it is higher than the frequency you are trying to pick up or you will never be able to tune it properly and that is easy to do with a signal generator and scope.
Will building one of these finally make my atomic clock be able to pick up a signal and work?
So does this actually work unlike those worthelss little loopstick antennas that Universal Solder sells that never pick up anything?
Thank you for the wonderful video!! Could you give the values of capacitances you used and/or the range of the variable capacitor? We are making one for SID Monitoring
Nice demonstration. What is the loss factor indicating the loss of ??
I would like you to check something for me. If it is a very good square wave output, it is supposed to be the fundamental and odd harmonics. Check the signal strength of the odd vs. even harmonics. The odds should be much stronger. If they are not, that says that the fundamental is not a really good square wave. I have used TTL devices for markers and other uses. Good thinking.
+1 Group W Bench reference! That made me smile. Thank you!
Maybe another solution would be to rip the PSU out of the monitor and replace it with something quieter. Might void the warranty though...
Excellent investigation ! I switched to using laptops as I couldn't find a way of making my monitors quiet. What is the conclusion ? Best way to supress noise is to tweak monitor orientation to null the noise ? It works but is not always practical ? Anyone have any more ideas ? I wrapped a monitor in chicken wire which worked great (see my channel) but of couse is totally impractical if you want to see what is on the screen ;-)
Just a suggestion. Instead of burying the parts list 3/4 of the way into part 2 of 3, put it at the start of part 1.
Good point noted...Thank you W1VLF
Where did the sample winding come from?
So just pump the tube full of glue so the parts stop moving around.
Good info.
Thanks, awesome video.
How can you tell if you have 400 ferrite rods?
*WHAT'S THE FORMULA*---I need to know the formula for building this antenna. Is is same as a simple loop antenna?
WWVB is currently operating at reduced power as high winds damaged the north antenna in January. Here in CA, my Casio watch can still receive it if I leave it outside overnight. The antenna should be repaired in a few weeks, but I was browsing for a passive solution to boost the signal. Sounds like your design might do it. I wouldn't need the 1" PVC parts. or the 10-turn coupling. I love the idea of using noise from a laptop to tune it. I'm not a ham, but I do have a Picoscope gadget that functions as an oscilloscope or spectrum analyzer using a laptop for display, etc. Serendipity!. I don't know whether I will pursue this, but I really enjoyed your video and laughed every time you mentioned the "Group W" bench. Just wish I had a lathe...
👍👍👍
My inverters make harmonic QRM on 20M about every 90khz. This video told me it will only null one selected and not all. Thanks.
I keep looking for the parts list and not finding it - specifically what ferrite are you using? Good grief 23:12
Today I managed to locate the rfi which was interfering with my sdr and Belka, and it turned out to be my monitor, exactly the same one as in your video! Having found the source I searched on the internet for solutions, but you don't give one. Can anything be done in the case of monitor-generated rfi?
do you have a comparation of those loop vs a long wire H or Vertical ?
Hey thanks, what a great illustration of this function, Straight to the point, minimal bloat content.
Why not a sine wave instead of the little portable radio? Am I misunderstanding something about the inherent process in the single processing variables?
We live on the ground floor and the electrical panel is right next to us in the apartment. I think this creates more noise. I am a bass baritone. My voice range is 100 Hz. When I use a switched psu, I can hear this noise as a fog curtain while listening to music and in my voice recordings. When I use a power protected psu, the sound is clearer and more vivid. It happens. I will buy a 7 inch mini monitor in my recording studio and try it by feeding it with a protected PSU.
What would happen if you made a series vs. parallel LC circuit for these passive receiving antennas? I know that for the WWVB-spoofing antenna I built, I used a series LC circuit since the transmit antenna is powered by an ESP32 GPIO output and by using a series circuit, I could assure that the reactance was minimum at the resonant frequency so there would be little chance of drawing too much current on power-up or power-down since the reactance out of resonance would be higher. But for a passive receiving antenna where one is not pumping current into the antenna, does it make a difference whether parallel or series?
Interesting video, Thank you !
Thanks!
Too much noise inducing the loop its needs more filtering needs to be notched ...its eay to noisy