On Mar 13, 9:09 pm, Artem wrote:
Sorry.

-----------------------------------------------
Hello all.
I'm looking how to make narrow band active antenna for 7 or 10.1mzh.
My idea: I will use magnetic antenna with one loop. A one-turn loop of
3.14m cupper pipe with diameter 15mm has 2.687uH. With Varicaps of
192pf it will have resonance frequency of 7MHz. I will load this LC
tank directly to Gate one of dual gate MOSFET.
http://homepage.eircom.net/%257Eei9gq/rx_circ.html
http://homepage.eircom.net/%257Eei9gq/mosifamp.GIF
Should it work? I'll never seen such schematics. Usually people use
transformers. But I will place this transistor directly inside gap in
the loop of cupper pipe. The Gate of MOSFET will add only additional
2pf to Varicaps and it will be very easy to compensate.


-----------------------------------------------

Artem.