Welcome to the Home Page of G8ACE

View the 47 GHz G8ACE / GW3PHO QSO

Thanks to Mike G0MJW for the recording.


View using ADSL View over Phone Line


Requires Windows Media Player

Views of the Antennas for the

24 47 76 GHz Microwave Activity Day at Hackpen IO91CL21 on 5th September 2004 are shown left and right.

Video links are to the right of screen.















Report by G8ACE

Report by G3PYB

Link to G8BKE Website & 76GHz report

View the 76 GHz Transverter


47 GHz

Inside my 47 Ghz Transverter

A Beacon System

24 GHz



10 GHz


5.7 GHz

The 5.7GHz system

Home QTH Antenna

3.4 GHz

My 3.4 GHz portable

antenna system


2.3 GHz


1.3 GHz



Crystal LF Jitter


More Stuff

Useful Converter






This OCXO left uses a 5th overtone crystal and has been developed to provide improved frequency stability when operating on all the microwave bands.


It has varicap frequency control for fine preset adjustment or for connection to a PLL such as the Reflock CT1DMK design.


Click here or on the image left for more MKII OCXO information.


An Ovened Reference Oscillator

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