[Elecraft] POW Radio - Thanks

[Cherie and Lynn Hammond]

Fred Jensen wrote:

> A big thanks to all who provided information and ideas on the "POW 
> Radio" project.  FWIW, I learned a few things:
>
>  We're going to use a 1N34A and do a little tap dance around the razor 
> blade issue in the introduction. 
>
> 73, and thanks again,
>
> Fred K6DGW
> Auburn CA CM98lw 


Fred, you are doing almost exactly what I do. Every year now for the 
past 4 or 5, we build the POW radio with the AP Physics class here in 
Anchorage. The teacher (who is a national award winner) fits the project 
into his lessons on resonance. We have a model with the pencil lead and 
razor blade, which the kids can see, but they use a diode.  The coil is 
magnet wire wrapped around a short length of PVC tubing; we have found 
that we don't even need a capacitor, and suspect there is enough stray 
capacitance between the coil windings to do the job. Nothing seems 
critical in this exercise except for a decent ground and antenna (which 
the school district kindly installed on the roof for us.) The smiles on 
the kids' faces when the radios "sing" makes it very much worthwhile.

Good Luck!
Lynn KL7IKV

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