The guide below will assist you in identifying the various types of scanner crystals. While most scanners use standard 10.7 I.F. crystals, you may find that what you originally thought to be the correct crystal for your scanner will not work because the crystal is a different I.F. than the scanner uses. BEARCAT SCANNER CRYSTAL IDENTIFICATION (10.8 I.F.): A-135 MCS-2 A-135-2 C9-86 RCD-2 BCM BCL BCH BC-E BCT JK-5 ECS-2 JK-5BCL JK-5BCU JK-5BCH 10.8 CCI ELECT-3 BC3 BRMU REGENCY SCANNER CRYSTAL IDENTIFICATION (10.7 I.F.): ECS-1 RCD-1 MRH-1 TMR TN-1 PEI JK-1TMR ECSU-1 ECSH-1 ECSL-1 10.7 CCI MCS-1 MRL-1 MRU-1 TC-L17 BOMAR A-4 JK MRH6 302-500 T417 TO FIGURE ACTUAL CRYSTAL FREQUENCY: LOW BAND = LISTENING FREQUENCY + RADIO I.F. (10.7 OR 10.8) HIGH BAND = LISTENING FREQUENCY - RADIO I.F. (10.7 OR 10.8) Then Divide by 3 UHF BAND = LISTENING FREQUENCY - RADIO I.F. (10.7 OR 10.8) Then Divide by 9
In an earlier listing there was confusion on the frequency charts to use Bearcat crystals in Regency Scanners and Regency crystals in Bearcat Scanners. Here is a simple example: Low Band:... A Bearcat crystal receives on 46.120 mhz. The actual crystal frequency of this particular crystal is 56.920 mhz (Receive Frequency + 10.8 I.F.). If this crystal were to be used in a Regency Scanner, the crystal would receive 46.220 mhz (56.920 - 10.7 I.F.) High Band... A Regency crystal receives on 154.875 mhz. The actual crystal frequency of this particular crystal is 48.0583 mhz (Receive Frequency - 10.7 then divide by 3). If this crystal were to be used in a Bearcat scanner, the crystal would receive 154.975 mhz. (Actual frequency * 3 plus 10.7) Similar calculations can be used for UHF Bands.
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