[Boatanchors] A Little OT - Need to locate a crystal radio KIT for granddaughter going on 12

[Robert Moses]

1N34a germanium diode works as a detector. (Silicon diodes do not have a low enough voltage drop to be sensitive enough.) If you want to go there
you can make a crystal detector with a piece of galena or pyrite. A high impedance earphone is needed. Tuning can be done with a variable
capacitor or a variable inductor that can be home made with ease by a 10 year old with instruction. A high impedance earphone is the only part
that is hard to make at home, but you can buy one (or 2) in the $5 price class. If you want to discuss specifics then write back. You can buy
kits, but they are expensive and much less fun than making the radio by hand.



On 04/12/2015 04:27 PM, rbethman wrote:
> All,
>
> She is in the 5th grade.  Is in ALL AP classes.
>
> Loves science, reads at 9th grade level with ease.
>
> The wife and I will be going down her way this summer.
>
> I'd like to take it and a small soldering station.
>
> She gets to keep it *IF* the desire is shown.
>
> [ I may regret this!  She already has my original Celestron N8, 8" SCT
> Telescope! ]
>
> Regards, Bob - N0DGN
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