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Author Topic: Foxhole Radio detector variants  (Read 5623 times)
VU2NAN
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« on: May 12, 2014, 08:41:02 PM »

Here's another update.

http://nandustips.blogspot.in/2013/05/foxhole-radio-detector-variant.html

73,

Nandu.
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N1NQC
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Posts: 66




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« Reply #1 on: May 13, 2014, 05:16:20 AM »

Hey Nandu,

Ginger cell looks  very interesting. I've never heard of that idea  before.

K
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VU2NAN
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« Reply #2 on: May 13, 2014, 06:00:52 AM »

Hi OM Kevin,

It was there on the kitchen counter and I had to try it! As luck would have it, I got the required voltage and it worked.

Many thanks.

73,

Nandu.
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KA8VIT
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« Reply #3 on: June 17, 2014, 04:45:18 AM »

Here is a picture of a foxhole radio I built about 10-years ago for a demo to
a radio club.

http://ka8vit.com/download/Foxhole_Radio_KA8VIT_01.jpg

73 - Bill KA8VIT
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N1NQC
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« Reply #4 on: June 18, 2014, 02:43:06 AM »

Hey VIT,

What type of  tuning action did you get from the coil wiper ? Could you clearly separate stations ?

K
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KA8VIT
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« Reply #5 on: June 18, 2014, 04:28:08 AM »

Hard to say as there are not a lot of loud AM stations near each other around here but I easily tuned in five or six stations.

I had some trouble getting all the enamel off of the coil where the slider slides across it.

I also could not find a "blued" type razor blade so I had to heat the one in the picture up with a propane touch and quench it in cold water a couple of times.

I was taught how to make a foxhole radio by Paul Cornell, W8EFW, (a charter member of QCWA Chapter #1) who built and used these in the South Pacific during WW2 and sent in the design to QST which was printed in the Sept 1945 issue.
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N1NQC
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« Reply #6 on: June 20, 2014, 12:12:53 AM »

Cool stuff.

K
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