Hello,
I just made calculations following the instructions of the site I quoted
If we consider that the impedance is 50 Ohm, not 500Ohm? ?(As said Allison) , I find exactly the same values as Ford calculed
L=613nH, C=19PF (c+3pf crystal filter)
so L5 L7 =613nH? and C212 C214 = 16Pf (19-3)
if impedance is really 500 ohm, i found
L5 L7 970nH and C 3pF, so C212 C214 near 0
So is there a mistake of what is indicated.
This seems to correspond much more to 50 Ohm than 500.
Will this statement be corrected?
"The 45 MHz filter needs 500 ohms termination impedance on both ports.
?We use simple L network to match the filter to either ends of the front-end and the 2nd IF mixer."
Can Ashan confirm what we have done?
I want to be sure.
It¡¯s cerebral gesticulation, I agree. LOL
cdt
Gerard