This module pictured to the right uses the same oven circuit as the MKII OCXO but is for use at 5 or 10 MHz or any specific similar frequency. Using a fundamental mode AT cut crystal the circuit incorporates crystal drive level control and provides a 0dbm sinusoidal output signal into 50 ohms.

The circuit was designed by G8CPJ and implemented here using mainly surface mount components and integrated into the existing G8ACE oven design.

The Oscillator is varicap controlled for phase locking to GPS, BBC Radio 4 on 198Khz or similar reference transmissions. The 10 MHz signal can be distributed around your microwave station via an amplifier to phase lock OCXOs as above. This is a new version of the pcb and is now now 40mm square to ease construction. Box Size 55 x 55mm. more information.

A x24 multiplier for use with the MKII OCXO either as part of a multiplier chain or test signal source

Using four semiconductors the output power of the module shown left is 40mw from less than 1mW drive at the band centre. Drive level control is incorporated. All tuned inductors are printed. The Output Filter is located at the top of the PCB. The on board 9v regulator on the underside. Omitting the last stage the module can be used at 23cms.

Module size is 110 x 55 x 30mm.

Further details here or click the image.

Page last updated 19/02/2006