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New (November 12, 2021) The Keyall HV + kit

See this page to compare the various Keyall kits

[Keyall HV + parts picture - click for larger view ] The Keyall HV + kit allows the owner of a keyer with a low voltage positive (NPN or n-channel MOSFET) keying transistor to drive the vacuum tube transmitters and transceivers of yesteryear. This unit will key negative voltage rigs (grid block keying) or positive voltage rigs (cathode keyed tube transmitters. The output transistors and capacitor are rated at 1000 V and 3.1 A (3100 mA).

Suggested by Wes, W3KW, the Keyall HV + kit is an update of the original Keyall HV kit that is mounted inside a tube transmitter and is powered from the 6.3 VAC filament winding.

  • design is a MOSFET based solid state relay, SPST-NO single pole, single throw, normally open
  • the kit adds a 3.3 volt regulated power supply powered by the 6.3VAC filament winding to the regular Keyall HV kit
  • high voltage output is optically isolated from the low voltage input
  • kit includes a circuit board and most board mounted components
  • board size is 2 x 2 inches
  • Price (no printed documentation) is $18 + shipping/handling
  • add another $1.00 for a 6 pin socket for the PVI

  • Printed manuals available for an additional charge or save money by downloading (Right click/save target as) and printing the manual , schematic and parts placement diagram.

    Print out a Kit order form to figure your order manually
    OR try our: javascript order form to let your browser do the math

    Downloadable files for the Keyall HV kit

    The Acrobat files of complex diagrams (like the schematic) may not view well on your computer screen - suggestion: use the magnifier to zoom in for better detail or print out the file.

    the manual , schematic and parts placement diagram.

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