Icom OCXO/TCXO Data

Part Number Voltage Frequency Retail Price

CR-64 13.8VDC 30.720MHz $129.95

CR-263 (*) 8VDC 30.720MHz $109.95

CR-282 30.000MHz $139.95

CR-293 30.200MHz $309.95

CR-338 32.000MHz $74.95

CR-502 $87.95

(*) Note: The CR-263 was used in the IC-1275A series transceiver and used an 8VDC heater. The CR-263 is extremely hard to find. The CR-64 unit may be used if the heater voltage is changed to 13.8VDC, bypassing the 7808 regulator. This slight modification is easily reversible. Both the CR-64 and CR-263 are the same physical size and pin out except for the heater voltage difference.

Since the CR-64 was used in all the Icom IC-575A/H, IC-275A/H, IC-375A, and IC475A/H series radios, this lends to the inclination that the 8V heater on the IC-1275A was an engineering mistake that was never corrected. Trying to use the CR-64 directly in the IC-1275A circuit will over stress the 7808 8VDC regulator and should be avoided. However, regulating the heater voltage can be a good practice and should not be taken trivially.

If you have Icom OCXO or TCXO information not listed here, please email it to K4HV. Thanks!