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Welcome to the
Home Page of G8ACE |
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76GHz
Link to G8BKE Website & 76GHz report 47 GHz
24 GHz10 GHz 5.7 GHz 3400 MHz My 3400 MHz
portable
2.3 GHz 1.3 GHz Investigations |
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.
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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. |
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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. |
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