N6QW -- Left Coast Radio

    Our 12MHz IF Amp plot out to 100MHz     In yesterday's posting I shared a 9MHz IF Amp using the J310's configured as a Dual Gate MOSFET. Soon you will be able to purchase a J310 DGM module from K7TFC. Now that you have a Module what do you do with it? A good answer is to build an amp circuit that could be used in an IF Module. In true N6QW fashion I included something in yesterday's posting that may have been missed by the Blog readers. Yes, Capacitive matching! So let us examine that a bit.   For that examination I refer you to the diagram which is for a 12 MHz IF amplifier. For those ever welded to Bitx circuitry and never try anything different-- this will work with a crystal filter from the Bitx 40.   A good deal of time has been spent in trying to come up with the turns ratios to match things like a TIA amp (50 Ohms) to a 500 Ohm filter. That is a 10:1 match so we have the 19 Turn and 6 Turn transformer (19^2 = 361 and 662 = 36 thus 361/36 = 10). But what if you wa