That's fascinating Neil, I have a few boring Bendix panaplexes and was
curious about their manufacture. I believe they're marked Kr85.

On Mon, Apr 15, 2024, 5:47 PM Neil QQ <nei...@gmail.com> wrote:

> Until, at least, sometime in the early 2000's 90's King Radio (aka
> Bendix/King) was still selling NAV and COM radios using their own numeric
> panaplex type displays e.g. KX155, KX165.  These displays were custom
> designed and fabricated in-house in Olathe, KS.  To the best of my
> knowledge they were all neon orange monochrome.  The gas used was a
> proprietary witches brew that included several radioactive trace elements.
> I recall seeing a prototype ILS indicator similar to the one referenced in
> this thread.  I don't believe the King display was commercialized.
>
> An ILS display shows deviation from the localizer (right-left guidance)
> horizontally and the glideslope deviation (up-down) guidance vertically.
> By "keeping the needles centered" the ILS will guide a pilot to the runway
> threshold.  Such displays were also used for VOR navigation using only the
> right-left needles (or lit segments in this case).  In the simplest case
> they would provide guidance to the VOR station and identify the cardinal
> radial direction that was being flown to reach the station.  When executing
> a simple form of an instrument landing system (ILS) the pilot flies, at a
> particular altitude, along a "to" radial to find a particular VOR station.
> Once directly over the VOR the pilot flies on a specified VOR "from" radial
> until the localizer (right-left) and glideslope (up-down) needles move into
> the active range (no longer parked and "flagged" at the display extremes).
> From there the pilot "keeps the needles centered" until visual runway
> confirmation is obtained.
>
> On Saturday, April 13, 2024 at 11:27:41 PM UTC-5 Audrey wrote:
>
>> The seller is the author of this article.
>> https://www.industrialalchemy.org/articleview.php?item=3247
>>
>> On Fri, Apr 12, 2024 at 11:36 AM Nick Andrews <nickja...@gmail.com>
>> wrote:
>>
>>> Never seen or heard about this one before.
>>>
>>>
>>> https://www.ebay.com/itm/276389569367?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=AkFpft62ST6&sssrc=2047675&ssuid=9S4jfnnKS4i&widget_ver=artemis&media=COPY
>>>
>>> Anyone heard of this or have one?
>>>
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