[CQ] making a foxhole radio tomorrow

[Michael Shiloh]

we want pictures! and i'm especially interested in technical details of 
the rusted steel crystal

On 07/24/2013 05:56 PM, Casey Callendrello wrote:
> I used a piezo earpiece I found lying around the space in a crystal
> radio kit. If I have any more desire to poke around on this, I'll move
> the antenna to the roof and and use the germanium diode.
>
> On Monday it was demonstrated to the seeed studios people (the Shenzen
> open hardware company), who have barely touched analog, and it blew
> their mind. They kept asking where the power came from! Then the piezo
> died. Entropy is such a mean mother.
>
> -c.
>
>
> On 7/22/13 2:28 PM, AF6MQ wrote:
>> what kind of earphone/speaker did you use?
>> a really high impedance usually works well with those.
>>
>> next step would be a single tube amplifier right?
>>
>> --.
>>
>> On Jul 22, 2013, at 14:22 , Casey Callendrello wrote:
>>
>>> On 7/19/13 9:39 PM, Casey Callendrello wrote:
>>>> I'm going to try my hand at making a foxhole radio tomorrow. I know
>>>> it's simple, but it's something I've always wanted to do. I'll be in
>>>> the space around noon.
>>>>
>>>> -c
>>> This was fairly successful. I was able to pick up that AM sports radio
>>> station that infects everyone's poorly-shielded circuits. I made the
>>> diode out of some old steel from a computer case.
>>>
>>> Reception was very quiet, though. I'm wondering what I could do to
>>> improve it. If anyone has any suggestions, I'm all ears. Next step is
>>> definitely to make an AM transmitter.
>>>
>>> There's 50ft of wire hanging out the back window as an antenna, in case
>>> anyone else wants to play around. The radio is in the display case at
>>> the front door.
>>>
>>> -N1QGQ/casey
>>>
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-- 
Michael Shiloh	
teachmetomake.com/wordpress
KA6RCQ									

Educational Materials coordinator at Arduino.cc
Electronics, Robotics, Digital Fabrication, and Arduino educator
California College of the Arts
San Francisco Art Institute
San Francisco State University