Date: 9th March 2008
Circuits and Pictures of the G6AVK QRPp Beacon's

New!! the DDS Beacon

A few of my usual poor quality Pictures of the latest "bare Bones" DDS Beacon based on the design by Matteo Campanella
I hope in time to add a few more Pictures showing the LPF and PA boards.
Some brief info on the Project Here


DDS BeaconDDS Beacon

 

The NEW G6AVK-3 Beacon which now uses the CWKtiny Keyer and now has a simple PPT switching and adjustable power.

G6AVK-3 Beacon Data:
Circuit Diagram Here in PNG format
Circuit Diagram Here in PS format
Circuit Diagram Here of the DAC in PNG format, kindly provided by Chris DL6JAN.

Some new Pictures of the new G6AVK-3 Beacon:
At long last the LPF for 7Mhz has been added to the Buffer/PA, and I can switch between the two filters
with small miniature relays, crude but works OK. Not "Microwave" standards Hi!
Bottom left is a closer view showing the relays, the preset to adjust the drive to the PA.

7/10Mhz Beaconwith the lids on

Buffer/PA/LPF's and switching


Date: 4th June 2006
Some Pictures of the new G6AVK-3 Beacon, just powered down after the 7Mhz mini-test this weekend.
Top is the Buffer/PA (still not finished, a 7Mhz LPF to be added) but has adjustable power level, below right
is the 7Mhz Temperature Controlled Crystal Oscillator, DL6JAN Keyer + DAC..
Bottom left is the original 10Mhz Temperature Controlled Oscillator.

7/10Mhz Beacon 

Some Close-ups:
        This shows the 7Mhz Temperature controlled                                                      The unfinished Buffer/PA... 7Mhz LPF to be fitted
            Oscillator and DL6JAN Keyer + DAC

7Mhz Osc, Keyer           Buffer/PA

De Colin
The complete setup of the G6AVK-2 (Development Beacon):

Top Left: 2N2222A Buffer which drives a 2N3866 PA,
Bottom Left: The Temperature Controlled Crystal Oscillator
Bottom right: the NE555 waveform generator design by DL6NL



G6AVK-2 Beacon Data:
Circuit Diagram Here in PNG format
Circuit Diagram Here in PS format

Captures for the activity day 21-22nd Jan 2006 and 18th-19th March 2006

Captures for the 7Mhz activity day 7th-9th April 2006


The Development Beacon goes live!
Shown here is the G6AVK-2 Beacon active on the 21st-22nd Jan on an activity weekend I had.
The Beacon was running 500mW on 10.140.015.
Notice how clean the output is on the Spectrum Analyser.



Some Close-ups:
Colpitts Oscillator with the DB6NT Crystal Heater



The DL6NL NE555 Waveform Generator



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