Welcome to the Home Page of G8ACE

 

 

 

76GHz

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

Amplifiers

Moonbounce

10 GHz

 

5.7 GHz

The 5.7GHz system

Home QTH Antenna

3400 MHz

My 3400 MHz portable

antenna system

 

2.3 GHz

 

1.3 GHz

 

Investigations

Crystal LF Jitter

The G8ACE MKII OCXO

 

 

This OCXO using a 5th overtone crystal 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.   

 

A kit is available for this unit,  more 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 special similar frequency.  Using a fundamental mode crystal the circuit incorporates drive level AGC and provides a 0dbm 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 or here at G8ACE to the BBC Radio4 transmission on 198Khz.  The 10 MHz signal is distributed to lock test equipment in the Shack and also the 10 GHz home station,  more information.

 

A x24 multiplier for use with the MKII OCXO

 

Using four semiconductors the output power of the module shown left is 40mw from 1mW drive at the band centre.  The Output Filter is located at the top of the PCB.  The on board 9v regulator on the underside.

Module size is 110 x 55 x 30mm.

 

More details here.