Excellent idea, Gary!
73, Mike
www.w0btu.com
On Sun, Oct 28, 2018, 11:53 AM Gary Smith <Gary@ka1j.com> wrote:
> ... My mother was deaf and my dad, W1BML wanted her to become a ham. She
> had the problem of not hearing CW and when she would try to copy CW, she
> felt it via vibrations on the table the speaker was on.
>
> Dad got the idea to take one of the carbon microphones for the 50's
> telephone and wire it to the headphone out that so it would vibrate against
> her forearm with CW and was held against her forearm by sliding her arm a
> sock with the tip cut off. It worked perfectly though she never learned the
> theory, she did learn CW.
>
> He also experimented with speaker coils but found the mic element the most
> comfortable. Those aren't easy to find today but that moving coil did work.
>
> With this arrangement you can get instant biofeedback to your keying.
>
> 73,
>
> Gary
> KA1J
>
>
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