Re: coherers

["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: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
> 
> Tesla list wrote:
> >
> > Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <evp-at-pacbell-dot-net>
> 
> >         What about eddy current losses?  Don't the turns make contact
> with each
> > other?
> 
> Maybe. A kind of litz wire would be desirable.
> 
> >         Sounds like a VERY valuable antique.  The last one I saw for sale
> went
> > for $4500 U.S., and had none of the features you mention.  Marconi
> > collectors are willing to pay an unbelievable amount for Marconi
> > antiques, more than $25,000 at a recent auction.
> 
> The staff of the museum looked quite impressed when I told them.
> The two devices are exactly these:
> http://www3.bc.sympatico.ca/radiomuseum/maggie.jpg
> http://www.faradic-dot-net/~gsraven/fons_images/Page_2/MAG_DET.jpg
> (Without the little handle in the pulley)
> http://www3.bc.sympatico.ca/radiomuseum/tuner.jpg
> http://www.faradic-dot-net/~gsraven/fons_images/Page_2/marctune.jpg
> There is a schematic diagram here:
> http://home.luna.nl/~arjan-muil/radio/marconi/marconi-system1.html
> 
> Antonio Carlos M. de Queiroz

	I'm sure they don't want to sell it, but if they should be interested I
can tell them a couple of places in the U.S. where they could advertise
for bids.  Too bad you couldn't get them to give it to you for
experiments!

Ed