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VCXO Boards       THIS SITE is BEST Viewed using Screen Resolution of 1124 X 768.

    Following Many versions of VCXO's this is the final version I have decide to use in all VCXO's in the Future, it is extremely universal at all Freq. up to 7th Ovetone XTAL's that can be used in VCXO.

    Combined with the New CPLD PLL System as shown on another page, these two Boards work exceptionally well.

    NOTE: On this CPLD PLL Board I am using a second Phase Lock Synthesizer to indicate Lock by driving a LED device. The additional cost using thet CD74HC7046AM device is very little, and it can also be used as the PLL as well with a very few extra components.

    Most People are asking that this Device be Installed as well, as a result the New CPLD PLL Board being professionally produced will include facilities to accomidate the 74HC7046.

    The VCXO uses one Creamic Trimmer Capacitor Value designed for UHF applications are 1 to 30pF Gold Plated Devices, very high quality to say the least.

    If you want a CPLD PLL Synthesizer Board, or VCXO Board please contact me at:........... This PLace

    I plan to have several version available, including complete Kits, or partial Kits, as well as completely assembled and tested Boards.

    Below are Images of this System, Schematic, PCB . The System Shown Installed and Locked is running at 106Mhz to be used at 24 & 47Ghz


    New Schematic to come

    		VCXO Installed in an Old FW Brick enclosure

    CPLD Board Installed in opposite side of the same FW Brick enclosure

     
    FW Box with covers inplace and PLL Locked   This is NEW VCXO Board just manufactured, nice Board NEW VCXO with Resonate Coils in place...this is a DEMO Board ONLY
        Cost $110USD if U supply XTAL + Shipping . Kits NOT available Add Cost of XTAL if I have to purchase XTAL
    CPLD PLL Programming JTAG, Top View

    JTAG Bottom View

     

    schSchematic Of VCXO, more to Follow

    Output Level as you Require to 40dbm

     
           

     

     

     
           
           

     

     

     

    		 

     

    		  
           

    NO LONGER TRUE IN MOST CASE, Most Boards are now produced Proficiently

    I produce my own Proto Boards, including Positive Etch spray painting, 90 second Exposure, Developing and Etching, so if anyone wishes a board, or boards please contact me. There is also much more to follow, including adapting the Freq. West Bricks at 10Ghz & above that dramatically reduces heating of the bricks.

    Regards & Thanks , Darrell (VE1ALQ)

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