Excellent idea, Gary! 73, Mike www.w0btu.com
On Sun, Oct 28, 2018, 11:53 AM Gary Smith <[email protected]> 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 > > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
