Select the Mastr II Combination number that matches your unit. Type in the frequency you wish to use for transmit or receive in the appropriate field, then click outside the box. The xtal frequency will appear! If you have a xtal and want to see the frequency where it can be used, enter the xtal frequency in the appropriate field, then click outside the box. Always double check the math before ordering crystals. Get General Electric Mastr II Icom details at Hall Electronics.
| General Electric Mastr II ICOM Oscillator Frequency Calculation | |||||
|---|---|---|---|---|---|
| Transmitter | |||||
| Model Combination No. Freq Range Digits |
Freq Band | Formula | Crystal Range (MHz) | Tx Freq Fo | Xtal Freq Fx |
| 12 | 25-30 | Fo /3 | 8.33-10 | ||
| 13 | 29.7-36 | Fo /3 | 9.9-12 | ||
| 23 | 36-42 | Fo /3 | 12-14 | ||
| 33 | 42-50 | Fo /3 | 14-16.67 | ||
| 33 Extended | 50-54 | Fo /3 | 16.66-18.00 | ||
| 44,45 | 66-88 | Fo /6 | 11-14.67 | ||
| 56 | 138-155 | Fo /12 | 11.5-12.92 | ||
| 66 Extended | 144-148 | Fo /12 | 12.00-12.33 | ||
| 66 | 150.8-174 | Fo /12 | 12.56-14.5 | ||
| 56, 66 Modified | 222-225 | Fo /18 | 12.33-12.5 | ||
| 77 | 406-420 | Fo /36 | 11.27-11.66 | ||
| 78 | 420-450 | Fo /36 | 11.66-12.55 | ||
| 88 Extended | 440-450 | Fo /36 | 12.22-12.55 | ||
| 88 | 450-470 | Fo /36 | 12.5-13.05 | ||
| 89 | 470-494 | Fo /36 | 13.05-13.72 | ||
| 91 | 494-512 | Fo /36 | 13.72-14.222 | ||
| General Electric Mastr II ICOM Oscillator Frequency Calculation | |||||
| Receiver | |||||
| Model Combination No. Freq Range Digits |
Freq Band | Formula | Crystal Range (MHz) | Rx Freq Fo | Xtal Freq Fx |
| 12 | 25-30 | (Fo+11.2) /3 | 12.06-13.73 | ||
| 13 | 29.7-36 | (Fo+9.4) /3 | 13.03-15.13 | ||
| 23 | 36-42 | (Fo+11.2) /3 | 15.73-17.73 | ||
| 33 | 42-50 | (Fo+9.4) /3 | 17.13-19.8 | ||
| 33 Extended | 50-54 | (Fo+9.4) /3 | 19.8-21.13 | ||
| 44, 45 | 66-88 | (Fo-11.2) /6 | 12.86-16.54 | ||
| 56 | 138-155 | (Fo-11.2) /9 | 14.08-15.98 | ||
| 66 Extended Low Inj | 144-148 | (Fo-11.2) /9 | 14.75-15.2 | ||
| 66 Low Inj | 150.8-174 | (Fo-11.2) /9 | 15.51-18.08 | ||
| 66 High Inj | 138-174 | (Fo+11.2) /9 | 16.57-20.57 | ||
| 56, 66 Modified Low Inj | 222-225 | (Fo-11.2) /12 | 17.56-17.82 | ||
| 77 | 406-420 | (Fo-11.2) /27 | 14.62-15.14 | ||
| 77 Extended | 420-430 | (Fo-11.2) /27 | 15.14-15.51 | ||
| 78 | 420-450 | (Fo-11.2) /27 | 15.14-16.25 | ||
| 88 Extended | 440-450 | (Fo-11.2) /27 | 15.88-16.25 | ||
| 88 | 450-470 | (Fo-11.2) /27 | 16.25-16.99 | ||
| 89 | 470-494 | (Fo-11.2) /27 | 16.99-17.88 | ||
| 91 | 494-512 | (Fo-11.2) /27 | 17.88-18.54 | ||
| 450-512 | (Fo+11.2) /27 | 17.08-19.38 | |||
| 92 | 806-820 | (Fo-45) /48 | 15.85-16.25 | ||