The PV electronics IN18 clocks (old style now) use 3x1206(?) type LED's
under each tube. Much as some people don't like them, I find a nice orange
LED complements the neon glow quite well...they can also make great night
lights when the tubes are shut down at night...;-)
Nick
On Wed, Feb 25, 2015
While I know that you don't care for LED backlighting, many of the designs I've
seen use (2) per IN-18 with one on each side of the tube seal for best effect.
You appear to have more than enough room for that.
Very nice boards!
Jeff
From: neonixie-l@googlegroups.com [mailto:neonixie-
Ok, John shamed me into tweaking the layout. Here's the latest revs. I did
address the lines crossing the hole keepouts, as well as rationalizing
out a whole bunch of vias. My criteria for a clean design includes as few
as possible jogs in the traces, minimal number of vias within reason, and
a
Yes, but thanks for reminding me; it has been quite a while since I refreshed
my memory. And there is new to me content in those links ! Thanks.
I have been green with envy for all the Vulcun stuff [as a kid I had a
walk-through of a Vulcan at an airshow here and was delighted to see one in
flig
On Wednesday, 25 February 2015 14:25:33 UTC, johnk wrote:
>
>
> OT still, but... there are web hits for Vampire with IFF and Radar.
> [Country vs year vs model etc though.]
> BTW, the Rebecca is part of an interrogator system; Rebecca finds the
> Eureka. The system can be employed as a DME.
OT still, but... there are web hits for Vampire with IFF and Radar. [Country
vs year vs model etc though.]
BTW, the Rebecca is part of an interrogator system; Rebecca finds the Eureka.
The system can be employed as a DME.
I am 'restoring' a Rebecca IV. The IV was the British test bed for the
m
Perhaps you can post the code that does the multiplexing - it may shed some
light on this issue. By the way, there's nothing wrong with multiplexing -
and it's not that hard to get it right, just follow a few simple rules like
the dead time, and you also haven't mentioned the frequency yet, whic
Hmmm... interesting observation Pete, are you talking about changing R21 or
R22 to 10K? I chose 100K because I have them in my NixieNeon clock.
-joe
On Wed, Feb 25, 2015 at 2:48 AM, petehand wrote:
> Just move R22 etc to the other end of R21 etc, on the base of the PNPs.
> Where they are now, t
Beautiful job, very original and so much work. Pity you had to spoil it
with cheap and nasty IN-11 tubes that don't have a proper 5. Maybe you
could get some Burroughs B5991s, they're the same shape and base* and a
hell of a lot more elegant.
* Although, they will not plug into the Russian IN-
Just move R22 etc to the other end of R21 etc, on the base of the PNPs.
Where they are now, those resistors are are doing nothing but wasting
power. When the NPNs turn on they're going to draw 1.6mA and drop 160V
across the 100k resistors R21 etc. You need no more than 3V to turn on the
PNPs, s
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