RE: single vs. dual conversion receivers
Mac_Man_UK certainly does know his stuff,and has the numbers to prove it(go ahead,do the math).Additionaly,I recall a page in Gearge Stiener's book ( Don't recall the title,and can't locate my copy raght now.Wife must have carefully stored it for me)expllaining how the frequency of the second crystal determines the frequency shift (JR/airtronics or Futaba/Hitec compatibility) of the receiver.