CT Spectrum Management Association
Connecticut's Amateur Radio Operator's frequency coordination group

Crystal Receiver Fundamental Calculator

Calculate the crystal frequency you need for that repeater or packet conversion project, or see what frequency that xtal you have on hand will give you!  Change the default values by entering your own.  To calculate for TX crystals, enter "0" in the I.F. box.
 

Enter Values in MHz
Receive Freq
IF Freq
Multiplier
L.O. Injection Frequency (Low)
Xtal Freq Low Side LO
Xtal Freq High Side LO
Enter Values in MHz
Xtal Frequency
Multiplier
IF Freq
L.O. Injection Frequency
Receive Freq Low Side LO
Receive Freq High Side LO