Heathkit GD-1U GDO

Been to a few radio rallies and at the CDARC surplus sale on the 13 February I recently bought a Heathkit GD-1U Grid Dip Oscillator complete with the original coils, a bargain at £10.

SAM_5282 (Medium)

Thanks to Andy (G6OHM) for sending me the link to the service manual and David (M0ZEB) for the Assembly and User Guide.


GD-1U-GPO Assembly and User Guide (7.3Mb File).

GD-1A-GDO Assembly & User Guide.

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3 thoughts on “Heathkit GD-1U GDO”

  1. Hi there.
    I too have just bought one of these GDOs. I would appreciate a copy of the service manual please.
    John (New Zealand)

  2. Hi John,

    I’m in the process of tracking down the Assemby & User Guide, however, I have placed a link on the page for the schematic, the guide link will follow when I have it.

    All the best

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