Mike, How ironic. I just commented on one of your old videos saying I hope you post some new ones soon, and you posted one. I always learn a lot from your videos. You explain things very well with a wealth of knowledge. I look forward to more in this series. Thanks and 73, Tom K2BEW
Very well done...! Always enjoy your videos. Very educational and informative and aligned with my own interests. I will likely build this circuit as I have two 50C5s without a home... Please keep up the great work...!
Noah Chalker , the article was written in the 1960s, as was a number of other such articles by W5LET, who may now be a "silent key." His call sign would thus be available for another Ham (or Amateur Radio Club) to claim. W5LET wrote a number of really good articles aimed at the beginning Ham in his day. A Google search will reveal some of them.
@@MIKROWAVE1 Right on, Mike :-) How'd it do during range tests, or tossing a receiver into the car and heading off and seeing how far the beacon could be received?
@@TerryMcKean At first I could not get down the block. At the end, I had improved the antenna match and grounding xabd developed an active whip for the car and a from scratch receiver that allowed me to hear my beacon audio going 70 MPH on Rte 495 40 miles away. Warrants a video in itself!
@@MIKROWAVE1 Nice!... yup, it would definitely make a great video... could get some new 'lowfers' into the passion, too. Getting the relatively tiny antenna all matched up and a good ground is definitely the key to success at 1750 meters. :-) There's another really-low frequency hobbyist band too, somewhere around 9 KC. Sometimes i listen in that band with my computer and the "SDR-Sharp" program and sound card for the RX, and a big coil of wire plugged into the microphone input on the sound card for the antenna. I haven't heard anyone there yet. The sound card and SDR-Sharp program can tune 0 to 96 KC, so there's definitely other cool stuff to listen to . :-)
I have to say I do not understand the motivation to redesign a 50 year old junk circuit, dangerous then, dangerous now, so that it is now something on the order of 10X times more dangerous when used on line power not only twice the voltage, but with both legs above ground Many, possibly most projects in such magazines as Popular Electronics was just absolute junk
Junk ac/dc stuff is now gold. can even find junk stuff. Apart from the shock factor 50volt heater hum, design is otherwise ok with series string. shocking ! ??? yes!
Obviously it's easy for one to see that you know little of the history of Electronics to make such a statement! I built this around transmitter around 1972 used it on the 40 meter band and enjoyed making contacts all over the US, Mexico and Canada from Arizona. I also rode in cars without seat belts, rode my bicycle without protective gear, drank water from a hose, played with sling shots and BB Guns, climbed mountains without any protective gear, played with scorpions and snakes. I am still alive and enjoying retirement as are most of my childhood friends. However, three of my childhood friends died from lung cancer caused by smoking.
fourfortyroadrunner , I got around the safety issues by building mine in a metal chassis, with a three prong, polarized power cord and plug. It was safe, and performed really well.
I have to say that I don't understand the motivation to post this. I can't believe that people are so careless to drive a few feet from other cars passing the other direction, what's to stop a person from just crossing into oncoming traffic? People who put stairs in their houses, and people with bathtubs are equally ignorant. People should wear helmets when not safely seated or laying down. But really the circuit works, it's fun. But not sure why you assume both legs are elevated above ground. He's in the UK, one leg is line and one is neutral.
You are a wonderful and knowledgeable teacher sir!
Thank you for watching!
Mike, How ironic. I just commented on one of your old videos saying I hope you post some new ones soon, and you posted one. I always learn a lot from your videos. You explain things very well with a wealth of knowledge. I look forward to more in this series.
Thanks and 73, Tom K2BEW
Fantastico por difundir tus conocimientos tecnicos sobre tubos electronicos de vacio tan antiguos
¡Gracias por ver mis videos y seguir construyendo!
Very well done...! Always enjoy your videos. Very educational and informative and aligned with my own interests. I will likely build this circuit as I have two 50C5s without a home... Please keep up the great work...!
Use the second one for filament voltage drop and you can use a smaller resistor.
Huh! W5LET is now the callsign for the LeTourneau University Amateur Radio Club!
Noah Chalker , the article was written in the 1960s, as was a number of other such articles by W5LET, who may now be a "silent key." His call sign would thus be available for another Ham (or Amateur Radio Club) to claim. W5LET wrote a number of really good articles aimed at the beginning Ham in his day. A Google search will reveal some of them.
The C6 is pF, it should be uF. But both C5 and C6 are 40 uF which is an odd value. They should be rounded up to 47 uF. Thanks.
I wonder if an SCR controlled voltage adjust would be better than that 27 watt dropping resistor. Prob induce a lot of noise though.
A capacitor of appropriate size can work with 50 Hz. To produce a reactance that could be tried.
Nice works and videos. Do you have any projects involving the 160-190 kc "lowfer" band?
I had a beacon on the air in the early 90's. 1Watt input. Cage antenna with 10 ft radius tophat.
@@MIKROWAVE1 Right on, Mike :-) How'd it do during range tests, or tossing a receiver into the car and heading off and seeing how far the beacon could be received?
@@TerryMcKean At first I could not get down the block. At the end, I had improved the antenna match and grounding xabd developed an active whip for the car and a from scratch receiver that allowed me to hear my beacon audio going 70 MPH on Rte 495 40 miles away. Warrants a video in itself!
@@MIKROWAVE1 Nice!... yup, it would definitely make a great video... could get some new 'lowfers' into the passion, too. Getting the relatively tiny antenna all matched up and a good ground
is definitely the key to success at 1750 meters. :-)
There's another really-low frequency hobbyist band too, somewhere around 9 KC.
Sometimes i listen in that band with my computer and the "SDR-Sharp" program and sound card for the RX, and a big coil of wire plugged into the microphone input on the sound card for the antenna. I haven't heard anyone there yet. The sound card and SDR-Sharp program can tune 0 to 96 KC, so there's definitely other cool stuff to listen to . :-)
Interesting interpretation of the 50 ft length limit which took 1000 ft of wire!
Many of those parts would have been cheaper at mouser.com At 13:00 Paper capacitors are NO NO !!
The fun is, you can buy a baofeng for 40 bucks... lol
MrBugsier5 , true, but a Baofeng will not do 80 or 40 meter CW.
I have to say I do not understand the motivation to redesign a 50 year old junk circuit, dangerous then, dangerous now, so that it is now something on the order of 10X times more dangerous when used on line power not only twice the voltage, but with both legs above ground
Many, possibly most projects in such magazines as Popular Electronics was just absolute junk
Junk ac/dc stuff is now gold. can even find junk stuff. Apart from the shock factor 50volt heater hum, design is otherwise ok with series string. shocking ! ??? yes!
Obviously it's easy for one to see that you know little of the history of Electronics to make such a statement! I built this around transmitter around 1972 used it on the 40 meter band and enjoyed making contacts all over the US, Mexico and Canada from Arizona. I also rode in cars without seat belts, rode my bicycle without protective gear, drank water from a hose, played with sling shots and BB Guns, climbed mountains without any protective gear, played with scorpions and snakes. I am still alive and enjoying retirement as are most of my childhood friends. However, three of my childhood friends died from lung cancer caused by smoking.
I don't understand the motivation behind your comment. Why are you even watching this?
fourfortyroadrunner , I got around the safety issues by building mine in a metal chassis, with a three prong, polarized power cord and plug. It was safe, and performed really well.
I have to say that I don't understand the motivation to post this. I can't believe that people are so careless to drive a few feet from other cars passing the other direction, what's to stop a person from just crossing into oncoming traffic? People who put stairs in their houses, and people with bathtubs are equally ignorant. People should wear helmets when not safely seated or laying down.
But really the circuit works, it's fun. But not sure why you assume both legs are elevated above ground. He's in the UK, one leg is line and one is neutral.