Hello Peter, Are you doing ok? It has been almost 2 months since the last video and we miss you. We hope all is well and will be seeing some new videos soon. If you are having some medical problems, we pray for your complete recovery! 73, Ski
Dear Peter, following your last message for the new hear holidays, it was a very long time. I hope find you well, you and your family. Please we miss very much your nice videos and we are waiting for it ..... all the best for you and for your family. Giorgio
Hi Guys, just seen the comments about Peter(my neighbor). I can tell you, that everything is ok with him but he is very busy in the moment. Farther there are very few projects in the moment to present videos continously. So Guys, don't worrie, the things will get better again.
I just finished watching all your videos on RU-vid and want to thank you for providing these. I have learned a lot. I hope at some time in the future you will continue with posting repair videos here on RU-vid. Thanks again.
Another outstanding presentation from Peter. This made me want to set up a small spreadsheet with all the variables so I can immediately try out the various approximations and get the answer for the value of the inductor and the "tapping point" of the coil as an auto transformer. Ausgezeichnet!
I really miss your videos Peter, but more importantly, I hope all is well with you and your family. Wishing you and your family happiness, and health this holiday season. 73, from your friend in New York City, Keith.
Hi Peter, We all miss your videos. I hope you are well and one day you will return. Until then, I re-watch all your videos. I can never watch to many times and learn more every time. 73 Jim
Thank you for the thorough explanation! Your explanation and walk-thru of the steps made it so much easier to understand! You are a blessing for us all!
To all the people who wrote in the comments that they are worried about Peter. He is fine, just very busy. Go to his community page and you can see that he wrote there 4 days ago to say just this and wish you all Merry Christmas. Have a great new year everybody.
Like so many others im worried about you. It's been 11 months since this last video and nothing's been heard since. I hope you are well. You are certainly missed. Your videos are excellent and you seem like the very embodiment of what it means to be a good member of the ham community. Thanks for the huge number of things you gave taught me. 73 de W1CBD
Gday Peter I nearly didn't watch this one but I'm so glad I did what a great refresher. I googled the calculator and it kept suggesting the fx-82AU plus to me. I ended up searching for both the fx-83DE is for Germany the fx-82AU Is sold in Australia where I am. DE and AU in the naming convention. I thought hat was pretty neat and found an fx-82ES And thought it would be for Spanish speaking countries but it isn't looking that way at the moment. We had a similar setup to this antenna in Australia and people called it the butter box because the tuning capacitor was housed in a butter box or Tupperware to protect from the elements. I haven't really seen this setup since the 70s though. Cheers
Now it is more than a year since we last heard anything from Peter, what has happened to him? Peter we miss you, your excellent films and the way you explain. You are, together with Mr Carlson, the best electronic "teacher" on RU-vid. If you read this, and are very busy, at least take one minute to tell us you are ok. 73 LB5JG Asle
Miss your videos Peter and Mike's. Realy wish you both could make some more videos. We know the camera gets in the way but there ways of making the camera so it isn't in the way like mounting it over head. Hope your staying safe. God speed. 🙏🏼
Good video and an appreciated refresher for me. I found myself at one point deciding to suggest that you put the finished product on an analyzer to show the response over frequency, but then I should have realized you would already be doing that! This video has also re-enforced my awareness of the need to purchase some metric measuring instruments. It may not be the "standard" here in the USA, but I happen to like the Metric System and look forward to using it. Now to find some place where I can purchase the tools! Keep up the excellent work!
Dear Peter, i have learned a lot of your videos, i hope you are fine. You certainly know that me as 1 of your fans, am missing you very much and hope to get news from you soon. Be well and take care for yourself, especially nowadays. Alles Gute mein Freund! 73, de Chris ha7wx
Also we would like to know what makes a Dipole having a diffeence Impediance of any End Feed Antenna? You explained a good point just that it would be of interest why with the same Material used the difference would be that huge.
Hi. Sorry if this is a tiny bit off topic but perhaps you can help solve this query that is stuck in my head :D Basically the question is weather or not it might be a good idea to use a Bal-Bal transformer at the feed-point on a doublet to match it to the balanced transmission line. The question came about after someone asked if they could use a 1:9 Un-Bal to match their coax to their 450 ohm transmission line. Many people were saying that it would be pointless trying this due to the unknown impedance of the entire system. So i proposed that he used a bluetooth antenna analyser to measure the impedance at the feed-point. Once the impedance of the active elements is known then i would have thought we could match the antenna to the feedline with a Bal-Bal transformer. Then since the system should now be sitting at 450ohm he could then use a 1:9 Un-Bal where he goes from 50 ohm coax to the 450 ohm balanced transmission line. I was just surprised that i have never come across this theory and wondered if there was a reason why it might not work. Perhaps it would affect the way that a doublet works and make it less effective as a multiband antenna? 73's
LOL! For 20 years I taught that LC "resonance equation" at University level, and I never knew it was called "Thomson's Formula"! But the "Fuchs Antenna Coupler" I DID know! (But PLEASE Peter, don't use R when you mean Z for the inductor impedance ratio!)
Nice example video Peter! Folks can avoid some of the manual math by getting the ARRL's "Single-Layer Coil Winding Calculator" (if you don't mind working in inches) to quickly determine the coil length, turns per inch vs. wire size you want to use etc. It's a slide rule style cardboard calculator (I'm sure there's an app for that nowadays!). I followed along using it and your calculations and came up with basically the same values. Still have to do the Z transformation though to figure the tap location. Thanks again Peter! 73 - Dino KL0S
There is an app for that. Well, a website with online calculators and downloadable PC software. Here's the link to their single-layer air-coil calculator. The PC software allows you to calculate the capacitance and Q of the coils as well. They have quite a few useful inductor calculators. coil32.net/online-calculators/one-layer-coil-calculator.html
Hello Peter , this wire for the coil please help me with the specifications , is not magnetic , in my country is difficult to find only for internet, thanks
This video is really highly instructive! Thank You, Peter. But if you not German-speaking viewers are about to search the internet for this type of antenna to get more (background-)information, use the term 'Fuchs-antenna', because 'Fox-antenna' will probably lead you on a false trace. Fox is the English word for (German) 'Fuchs', which happens to be the name of the inventor (Josef Fuchs) of this antenna. And the described matching unit is a Fuchs-Kreis, I'm not sure if it’s called 'Fox-circuit' in English, but it’s probably not.
Nice explanation Peter, very nice to show the auto transformer to, its much easyer to handle for the community of our fellow radio amateurs.. speaking of 2m, i would personally as a travel antenna just cut the breid from the center wire in the coax and fold it out to a dipole, but for HF its a little bit bulky ofcourse :-) again nice video... keep it up 73´s Anders
The coil wire is tin or silver plated copper coil wire. SOLID silver wire is very expensive and used in making jewelry. Great instruction in using the maths.
One over two pi root LC gives you the resonant frequency LOL. I have built many antennas, from verticals to quads, but I have not come across this particular one before. Great video and explanation. 73’s Lynton.
Hello Peter we miss you on RU-vid hope everything is fine with you. Let us know if your not doing any more video's or just taking a break. OR fixing the MEGA REPAIR and it's taking months to due. So once again if you have the time send us a message. *CHEERS* from *TODD* *_73_*
Great video with fine examples on how to do the calculations, Peter! One thing: I thought you mentioned the antenna wire should be longer than the calculated 'lambda /2'. In reality, the wave travels slower in a conductor than in air, so the wire will be shorter (by a factor of 0.9-0.95 times the wavelength) Of course, you need to start with a longer wire and cut it to resonance later, as you said. I have the great Rothammel Antennenbuch, which has about every imaginable antenna type Stein, LA9QV
Hey Peter, I have been following you for a few days and admittedly I underestimated your abilities. I would like to apologized formally and publicly! I am looking forward to following you and all your videos. Again please forgive me for my error. Be well.
Hi, your videos are very very good .. excellent job ! .. I would like to request you to make 1 video on the impedance matching over the pcb using your miniVNA Tiny .. no such excellent video is available on the net as far as i have searched for past 1 month. I am trying to learn on how to do impedance matching of my GPS antenna using the miniVNA but couldn't find any good source.
Re: Calculators. I still prefer GW Basic to a scientific calculator (I run it in DOSBox). It is so much easier to review my calculations and I am always close to my computer or a laptop when I am at the bench.
Hi Peter my name is mark I have question I have ts440s tx are OK but I receive in DSB LSB and USB could it be my DSB filter why can't I select one side band ,thanks in advance
Peter, tell me where are You from, I want to go there and buy You at least a few beers :D! Awesome job, great knowledge and wonderful troubleshooting on Your movies. Absolutely one of best channels on yt!
@@jimgiordano8218 Yea, one of German countries for sure. I hope Peter is back soon, I am missing his repairs ehhh I hope everything is all right. Take care in this crappy time and Happy Easter despite the undercooked bat crap ;)
Hi Peter, great video. Curious, the equation to calculate the value of the coil doesn't include permeability of the core. I noticed in some of my old electronics books that permeability is multiplied where you normalize with the 1nh. Does this equation use relative permeability? where air is around 1 as I noticed most equations use approx. 1.26 X 10-6 . I hope my question finds you well.
-Hello Peter, are you ok? I Hope everything is ok with you. We all miss the great and informative videos you make here om RU-vid. 73 from Norway, LB5JG
Excellent video...,just only one question about .., voltage tolerance for the capacitor..., how many volt consideration these cap.., could be support...?.., thanks YV6ENB
Great video, I've been wondering how to work those equations with too many unknowns. Question: at 44:17 you have 55 mm squared on the denominator of the equation to find the inductance (L) for 8mm diameter coil, why 55 mm squared? I think that you wrote the exponent 2 by accident as you didn't squared the 55mm when you entered things in the calculator. Personally, I don't like putting units inside my equations but in their own equations to the right of my calculations.
Right, and as you say he did not actually square the 55mm in the calculation so it turned out OK. For units, I just separately ensure that they all cancel/multiply to the correct unit we are looking for, in this case nH.
When you have an equation with "too many unknowns", that does not mean the equation is unsolvable. You simply estimate values for the variables that seem to optimize your current circuit in terms of size, space, capacitance value and so on and plug in for a potential result. The resulting value will be correct, as are other possible results if you choose different values. For example, if you wish the coil to be 20mm long, then plug it in and based on the resulting inductance value, you can determine where the number of turns is to create the autotransformer from the 50 ohm impedance output of the transceiver. That is done all the time in circuit design.
Wenn ich eine endgespeiste Langdrahtantenne aus Bronze mit der Länge 40 m habe, woher weiß ich dann deren Impedanz? Es geht nur um Empfang im 20 und 40 m Band. Wenn es auf 80m und 160m läuft, um so besser. If I have a end fed bronze long wire antenna with a length of 40 m, how do I know its impedance? It's all about reception in the 20 and 40 m band. If it runs on 80m and 160m, so much the better.
You can also take one or more fixed capacitors which has about the value. Then you have to tweak the coil (spread or squeeze, a winding more or less). The capacitor must also be able to withstand the voltage at this point. The voltage depends on the power of your transmitter.
This is getting to be very worrying. There are a lot of youtubers who someday just decide to quit, but usually there is a final farewell video or a message... Peter just disappeared... I am worried, and many others too...
