[CQ] making a foxhole radio tomorrow

[Casey Callendrello]

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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