26-10-2018, 11:23 AM
Many thanks Doug for your quick and informed details. I'll certainly experiment with the voltage divider and the tuned LC. Thanks also for the clue on how the 3 stage IF would work... perhaps that's a clue as to why the MW band image (or sprus?) spreads are 1/3 the original. It makes sense the 3rd stage 45kHz stage would be on chip.. the data sheet for the Si4735chip talks about its 'low IF' stage. The 6WF/6RN Tx is 50kW and 12km away. Further attenuating the antenna on specific frequencies will be a good experiment. Anyway.. plenty of good math and electrical avenues to investigate thanks Doug.
cheers Craig
cheers Craig