[HIham] [hamradiohawaii] Old razor blades and earphones

[Ron Hashiro]

Jim,

You might find this radio kit to be of interest.

http://www.xtalman.com/kits.html

Ron H

On 3/23/16 9:28 AM, Jim Yuen jimyuen at hawaii.rr.com [hamradiohawaii] wrote:
>
> Hi Hams,
>
> I'm trying to build a WW II foxhole radio for fun and a demo.
>
> I'm looking for a few double edge blued razor blades like the old
> Gillettes. It doesn't have to be new; any old, rusty blue blades will
> do. Do you have any lying around?
>
> I also need an old high resistance headset/earphone like the old Trimm
> sets. Even just one earpiece will do. Modern earphones have a low
> resistance about 8-60 ohms and are too insensitive to weak currents.
> The WW II ones are usually 1000-2000 ohms and can respond to the tiny
> signals from the razor blade detector.
>
> I'm willing to pick them up from you anywhere on Oahu.
>
> FYI: https://en.wikipedia.org/wiki/Foxhole_radio
>
> Thanks,
>
> Jim WH6GS
> 808-536-8180
>
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