Re: Coherers & magnetic detector

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

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<davep-at-quik-dot-com>
> 
> from:
>         Wireless Telegraphy & Telephony
>         Eccles
>         1918
> 
> No sensitivity given for coherers (perhaps too  many types?)
> Magnetic detector:
>         'more sensitive than coherer'
>                 estimated 0.0025 erg for a dot
> (' R A Fessenden proposed to construct a 'recording detector'
> hmmmmm.  Wire Recorder?)
> Electrolytic Detector:
>                 estimated 0.001 erg for a dot
> etc...
> 
> Principles of Wireless Telegraphy
> Pierce
> 1910
>         magnetic detector ... more sensitive than coherer,
>         less sensitive than electrolytic or some contact
>         detectors (crystal).
> 
> --
>         best
>         dwp

	Thanks!  Don't have either Pierce or Eccles, but looks as if I will
have to try to get copies if the price isn't too steep.  Now I have to
figure out how to convert ergs to something more meaningful (to me). 
I'm not sure how to figure the required power from the required energy,
since I don't know what time it is delivered in.

Ed