Re: Topband: Submerging variable caps in oil as substitute for vacuum variables

2014-01-29 Thread Shoppa, Tim
The author points out (correctly) the tempco issues with oil dielectric. Still I am intrigued by the thought of a remote tuning capacitor via hydraulic tubing :-). The capacitor plates could be as simple as two concentric cylinder conductors with appropriate spacers. I betcha crud collecting on

Re: Topband: Submerging variable caps in oil as substitute for vacuum variables

2014-01-29 Thread HAROLD SMITH JR
Subject:Re: Topband: Submerging variable caps in oil as substitute for vacuum variables The author points out (correctly) the tempco issues with oil dielectric. Still I am intrigued by the thought of a remote tuning capacitor via hydraulic tubing :-). The capacitor plates could be as simple