[Boatanchors] Looking for docs on Millen's 90651A GDO

[Nick England]

Those Rider “How to use…” booklets were pretty informative, IIRC.

https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Servicing/How-to-use-Grid-Dip-Oscillators-Rufus-P-Turner-1960.pdf


Nick England K4NYW
Chapel Hill NC
www.navy-radio.com


On Sun, Apr 12, 2026 at 6:54 PM Doug Hensley via Boatanchors <
boatanchors at mailman.qth.net> wrote:

> Thanks to Bob Sullivan, I've got the schematic but have not found the
> "narrative" of the unit, the manual.  There are many "original" 90651 links
> but for some reason the hybrid (half transistor, half tube) 90651-A eludes
> me.  Does anyone have a pdf version ?
>
> Also curious if anyone knows of a standard GDO how-to-use doc or ??  It's
> been awhile since I fooled with these.
>
> Thanks in advance,
>
>
> Doug W5JV
>
>
>
>
>
> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.
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