Ham Radio KITS - TOP PAGE - Washington Island BOOKS

1/2/2010 - Counter Preamp II kit has sold out

The Counter Preamp II kit provides a high impedance input amplifier for your frequency counter. It features:

[Counter Preamp II kit picture - 
click for larger version]
  • small (.7 x 1 inch) size
  • MPF102 JFET input, two PN2222 NPN buffer design
  • runs from 7 to 14 Volt supply
  • logic level (0 to 5 volt) output

  • For more information on the kit please download (Right click/save target as) the Counter Preamp II kit manual , schematic diagram and hookup diagram all in Adobe Acrobat (.pdf) format.

    For any questions, please send an email to me, Chuck Olson, WB9KZY at:


    with your question or the items you want and we'll email you a Paypal invoice.

    Ham Radio KITS - TOP PAGE - Washington Island BOOKS

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