Ron wrote:
Thanks for your research and the good www. information dr Paolo,
Harmonic response for my BITX17 would be as follows:
LO: 8.1 MHz
1 : 18.1 MHz
2 : 2x8.1 + 10 = 26.2 MHz
3 : 3x8.1 + 10 = 34.3 MHz
Don't forget:
2*8.1 - 10 = 6.2 MHz
3*8.1 - 10 = 14.3 MHz (that would make it a dualband BITX changing output filter... should check the diagram, I am fantasizing)
The mixer returns both sum and difference of input signals, right?!
Too bad even harmonics (*2, *4, *6, ...) are not as strong as odd, otherwise a BITX20 could become a BITX17 changing output filters. I did find some x2 frequency multipliers, though... :-)
But first of all, I have to start building my BITX20, then modifications can be applied!
Please someone correct me if I'm writing nonsense.
73,
Paolo
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