Hi!
LD-955A is the same as CD89P (100% match). High brightness. Designed for
multiplexing, M7S-1 base (12 long wires) - both by NEC. Only these two
in this substitute group - no other matches.
CD71 is part of a larger substitute group (group #0030 for my notes
here) - this is:
CD71
CD71LA
CD78
CD78/GR-115
CD78s
CD79
GR-115
ZM1325
But none of these all are "mystery" tubes - all well known. ;)
Best regards
Dieter
Am 07.10.2021 um 08:33 schrieb LB:
Here's a shot of a CD71 (left) and an LD-955A (right):
The LD-955A is noticeably slimmer, but it's kinda hard to make it out in
this pic.
IMG_7028.jpg
And here are the markings:
IMG_7031.jpg
On Tuesday, October 5, 2021 at 3:56:58 PM UTC-7 LB wrote:
This looks more like an LD-955A to me, I’ll get a photo when I get
the chance
On Oct 5, 2021, at 12:24 PM, David Chambers <[email protected]>
wrote:
Hi, some years ago I aquired 7 small Nixie tubes, the markings
have gone, but on one there can be seen a faint Hitachi logo. I
have attached a pic of one next to a Z5900M for size comparison. I
thought they must be CD71 type, but I also have 1 (just one!) tube
that is clearly marked CD71 with the Hitachi logo. It is fatter
though, and has a very open anode mesh, at 12.5mm dia, whereas the
mystery tubes are only 9.4mm dia.
5 of 7 mystery tubes work fine. Of the other 2 0,ne has a broken
anode lead, and the other appears to be dead. The leads on them
are quite oxidised and are a bit brittle.
I will never do anything with them, so if anybody - prefaraby UK -
wants them, let me know.
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