Re: longitudinal waves

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

May I suggest a shielded loop antenna. It is small and you can put a ceramic
capacitor across it to tune it away from broad cast stations.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Wed, 06 Mar 2002 19:34:45 -0700
> To: tesla-at-pupman-dot-com
> Subject: Re: longitudinal waves
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Wed, 6 Mar 2002 19:53:51 -0700
> 
> Original poster: "Steve Greenfield by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> <alienrelics-at-yahoo-dot-com>
> 
> Dave, if you can still find crystal earphones, they are very Hi-Z
> and very sensitive. When I was young I got into making crystal
> radios in every variety and a crystal earphone beat everything else
> hands down, including 2K headphones.
> 
> What are you going to do to prevent normal EM pickup of the radio
> waves? Two wires spaced 1/2 wavelength apart, oriented at right
> angles to the source sounds like it'll pick up normal EM waves just
> fine.
> 
> Steve Greenfield
> 
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
>> Original poster: "rheidlebaugh by way of Terry Fritz
>> <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
>> 
>> Dave: I suspect I am just a bit older than you, 50+ years or so.
>> I think I
>> should let you know that modern speakers are low impedance and
>> will not work
>> on a crystal set. You will nead to make your own high impedance
>> speakers
>> 2-20k as they are no longer made. Even high impedance ear phones
>> are hard to
>> get except surplus. You might try a crystal transducer or use an
>> amplifier.
>> Robert  H 
> 
> 
>