Ham Radio KITS - TOP PAGE - Washington Island BOOKS

The Keyall kit
December 5, 2015 - SOLD OUT

Please consider purchasing the 500 Volt version of the Keyall HV as a replacement for the Keyall

[Keyall circuit board picture - click for larger view of board ] The Keyall 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 and conventional +13.8V powered solid state rigs). The output transistors and capacitor are rated at 500 V and 2.5 A (2500 mA).

The Keyall kit is a replacement for the previous Grid Block keying adapter kit.

Note that the Keyall kit has been used for high power external amplifier keying by Gary, KD9SV.

Note that the PVI (white rectangle in the picture) now has a black color.

Also note that the board plating appears corroded, however it should not affect soldering.
Suggestion from a customer: use a brass brush to shine up the bottom traces before soldering.

An OM reported that his Eico 723 would not key correctly until he had removed the .01 uF cap.

The Keyall will key a single transmitter, please ignore the numbered output designations (1 & 2) on the board or documentation.

  • design is a MOSFET based solid state relay, SPST-NO single pole, single throw, normally open
  • high voltage output is optically isolated from the low voltage input
  • kit includes a circuit board and all board mounted components
  • just add your enclosure, in/out jacks and a battery holder
  • Size is 1.25 x 1.5 inches - fits into a candy tin with room to spare
  • Please note that all orders after 3/26/2015 will receive a new, slightly different version of the Keyall circuit board
  • Printed manuals available for an additional charge or save money by downloading (Right click/save target as) and printing the manual , schematic and hookup diagram also for post 3/26/2015 orders: new board changes.

    Downloadable files for the Keyall 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.

    keyall.pdf (54k) - an Acrobat file of the Keyall schematic

    keyallm.pdf (9k) - an Acrobat file of the Keyall manual

    keyallhu.pdf (38k) - an Acrobat file of the Keyall hookup diagram

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