Re: FW: Remote Tuned Primary (RTP) ideas...

Tesla List wrote:
> Original Poster: Dale Hall <Dale.Hall-at-trw-dot-com>
> 1.) How about a 1000/2000pF motor driven vacuum variable, +- 1000pF should
> provide good range around a viable tap.
> encl: pict of representative motor driven unit (higher C & V's available)
> The TRW swapmeet always has a selection, priced anywhere from ~$30 to about
> $300
> (last Sat of every month, next one is tomorrow -
> want me to look for you ?
> 2.) or How about making an oil emersed motor driven variable Cap - start
> with a big transmitting variable cap, add poly to multiply capacitance ?
> (in place of oil emersed relay switch matrix - advantage of "analog"
> resolution)
> Xmtg variables also frequently avail at TRW radio club/electronics swapmeet.
> Regards, Dale
> -----Original Message-----
> From: Tesla List [mailto:tesla-at-pupman-dot-com]
> Sent: Tuesday, October 26, 1999 8:32 PM
> To: tesla-at-pupman-dot-com
> Subject: Remote Tuned Primary (RTP) ideas...
> Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> Hi All,
>         One of my new projects (one of a zillion I have planned for the cold
> months ;-)) is to make a remote primary tuning device. 

	I'd recommend a string-driven roller coil as a simpler device without
potential voltage breakdown problems.  I'm using one out of an old
"Command Transmitter" which works quite well.  (Similar gadtets should
be available at TRW.)  Mounted it to a board and wrapped some 1/8" nylon
cord around the outside.  Can tune it from several feet away and the
whole project only took about an hour!