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Tunable Foxhole Radio



Uploaded by: utahike
Video Description:
My 10 year old son worked long and hard on this thing and finally got it working. He is able to pick up about 15 stations. This thing is pretty cool.
He won first place at his school and district science fairs. He placed 3rd at regional. Pretty cool indeed.




Tags for this video: AM Army Cool DIY Fair Foxhole Gadget Kids Military Radio Science Survival Survivalist WWII

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I will make one. i ... ( 3 months ago by drumbum0852)
I will make one. i just need some magnet wire. but did you need to "blue" your razor blade?
We used an ... ( 3 months ago by utahike)
We used an authentic WWII blued razor blade. If you do not have one...you simply need to oxydize the blade. Put it in some salty water for a couple of days....or easier, heat it with a torch or a gas stove until it glows and let it cool. Magnet wire is really easy to get...just go to radio shack and ask for it. Or..simply wind some solid core bare wire around the tube and spray it with varnish. This creates a thin barrier to stop it from shorting out.
Let me know how it goes.
Sure will! but it ... ( 3 months ago by drumbum0852)
Sure will! but it won't be for awhile i am pretty busy at the moment.
does it work in the ... ( 3 months ago by dinhnguyen0508)
does it work in the day time? Can it catch a station 25 miles far from my house?
Yes....easily. You ... ( 3 months ago by utahike)
Yes....easily. You will get some interference during daytime, and less at night. Something to do with the sun. Also, electric equipment around you can effect the reception. This test was done during the day. The music station tuned into was over 50 miles away.
Let us know how it works out.
Back in about the ... ( 2 months ago by NotOfThisGalaxy)
Back in about the 1930's, an old friend of mine's brother made something just about like that. Down at the 'ol fishin hole, he winded up some wire on a hog-wire fence, & connected a speaker to it. They could listen to the farm report & music on the ONE station in that part of Idaho. Bill Hall was his name. I don't know his brother's name; but the brother later invented the phased-lock-loop circuit in his garage. Bell Labs stole it from him. It is the crystal timing part of the PC.
if u think thats ... ( 1 month ago by wow1022)
if u think thats hard... im 15 and built a 3 watt audio amplifier from transistors
my radio isn't ... ( 1 month ago by Bigtruck2007)
my radio isn't working...
give some more ... ( 1 month ago by utahike)
give some more details...ie...what kind of wire did you use for your coil, what are you grounding to, what kind of razor blade are you using, what kind of speaker are you using?
I can help...it WILL work of done correctly...every time!!!
very cool. Good ... ( 1 month ago by utahike)
very cool. Good job. Post a vid.
Im using magnetic ... ( 1 month ago by Bigtruck2007)
Im using magnetic wire! Does the ground have to go outside? (DOn't laugh but Im using speaker wire for a ground and Attenna.. I burnt the razor blade..its blue! Im using regular headphones for Speakers.. Come on 10yr old dude..whats wrong? (smile)
ive built one of of ... ( 1 month ago by wow1022)
ive built one of of those accept used a ferrite centered coil,germanium diode,variable capacitor and built a high gain audio amp. I pulled out the entire AM band :D
It sounds like you ... ( 1 month ago by utahike)
It sounds like you have a bad ground. Run it to a copper pipe under your sink (unless your house has plastic pipes.) Wedge the ground into the pipe really good. Also, try moving the cat whisker until you hear something. Once the cat whisker finds a station, it really doesn't need to be moved again. Everything from there is done with the tuning rod.
Your antenna really needs to hang out your window. If it does not, you probably will not get good reception.
Let me know how it goes.
Also, I have found ... ( 1 month ago by utahike)
Also, I have found that the cat whisker works best around highly oxidized areas...just around the edges of the oxidation...also along the edge of the blade. Post a video and maybe I can help more. Good luck.
quiero hacer uno ... ( 1 month ago by infiernus666)
quiero hacer uno mandame los planos en español, usa algun tipo de energía?
Sorry, I do not ... ( 1 month ago by utahike)
Sorry, I do not speak spanish.
ok. i said. i want ... ( 1 month ago by infiernus666)
ok. i said. i want to make one, but i need a paper with intruccions, do you have one? can you send me?
send it? ( 1 month ago by infiernus666)
send it?
Do a google search ... ( 1 month ago by utahike)
Do a google search for "retro-ww2-foxhole-radio" and you should find one on the gizmodo site that is like this one.
I forgot to tell ... ( 1 month ago by utahike)
I forgot to tell you to sand off the coating on the coil where your tuning post hits. Otherwise you get nothing.
Let me know how it goes.
WOW! WOOOOOHOOOOO ... ( 3 weeks ago by TonyTuthill)
WOW! WOOOOOHOOOOO. THAT IS GREAT! I had heard it was simple! Thank you! Keep up the great work. You're my hero.
Excacally what kind ... ( 2 days ago by decade03)
Excacally what kind of wire did you yse mate?
Thanks! Great job btw
Very cool radio! ... ( 1 day ago by Daliwolf)
Very cool radio! What is the tuning rod that is resting on the coil attached to? I built a foxhole radio too, but I have no tuning rod.
It connects to ... ( 1 day ago by utahike)
It connects to ground, speaker and catwhisker.
Any other questions, let me know. And be sure to share how your radio goes.


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