Looking at HF receiver schematics on line I see many use Dual Gate MOSFET's as the first amplifier stage... and also for the mixer... mixing the incoming RF signal with the local oscillator.
However all of the MOSFET's I've checked out seem to be out of production... and the ones I've found seem to be for switching and control applications... not small signal RF amplifiers for the 1.8MHz to 30 MHz band and/or rf mixers for down conversion to IF.
What manufacturers are still making Dual Gate MOSFETS... or just FET's for use in such circuits... small signal RF amplifier for 1.8MHz to 30MHz range.
Can you suggest a part number?
Where can I buy these parts? (other than eBay)
Thanks for any help.
However all of the MOSFET's I've checked out seem to be out of production... and the ones I've found seem to be for switching and control applications... not small signal RF amplifiers for the 1.8MHz to 30 MHz band and/or rf mixers for down conversion to IF.
What manufacturers are still making Dual Gate MOSFETS... or just FET's for use in such circuits... small signal RF amplifier for 1.8MHz to 30MHz range.
Can you suggest a part number?
Where can I buy these parts? (other than eBay)
Thanks for any help.