My guess is that the two intended filter frequencies are:? 90Mhz (second harmonic of 45MHz 1st LO) and 12MHz (2nd LO).? The parts represent the right values for a filter at 90MHz, but it seems that 30M band would be wiped out by the second of the mods (which somebody has already observed).?? 12MHz should be being wiped out instead, so I suspect a typo.

Perhaps? either a 35pF capacitor and the 5?H inductor as stated or a 3.8?H inductor and the 47pF capacitor as stated being about right for getting the filter resonant just on the low side of 12MHz.?

Mike ZL1AXG

On 10/11/18 9:49 AM, Brian L. Davis wrote: