Having finished the DDS module I double check all the cabling and gave it a quick test only to find out that none of the DDS channels were operational, so I worked my way back, triple checking my wiring and everything was correct – or was it. I bypassed the 8 pin connector that links… Read More »
Pete, N6QW blog about building your own radio equipment, very informative and some interesting and inspirational content. http://n6qw.blogspot.co.uk
The VFO design is based on the AD9959 DDS which is capable of 20 X clock speed, for a 25MHz clock we can achieve over 200MHz however as I only require the VFO to operate at up to the 2M (144MHz) band 156MHz was suffice so running the clock multiplier at 16 X is enough.… Read More »
Having tried and failed and wasted too much Laser printer toner, gloss paper and time I have found a method that works for me. Key notes for success: Set the printer properties for max contrast, deselect any Eco Printing options, set graphics options to highest resolution. Clean the copper with a metal scouring pad and… Read More »
Having looked around for a suitable buffer amplifier design for my DDS generator I decided to go down the MMIC route as they are high gain and wide band – perfect for my application and the component count is kept to a minimum. I costed the materials and it worked out more expensive than an off… Read More »
Well, the project is in full swing and the reality of the journey ahead has became apparent. The plan this coming weekend is to build the DDS, MMIC amplifiers and Micro controller in to an aluminium enclosure along with all the external I/O connections and time permitting make the finishing touches to the software. Documentation… Read More »
Just installed WordPress so bear with me whilst I find time to make it pretty.