Don't numitrons have pretty high shoot-through current? I'd expect 100mA of
current going into the IC pins at each off-on transition. Which would
probably be fine since it's only for a few milliseconds and as you
mentioned it's been fine for years, but it's technically out of spec.
On Monday, 1
not my listing obviously..
https://www.ebay.com/itm/354229991047
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OK $191 per untested tube! Bit hot.
IanOn Wednesday, 17 August 2022 at 18:29:48 BST, Audrey
wrote:
not my listing obviously..https://www.ebay.com/itm/354229991047
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Yeah who knows, I've seen a few with cracks and outgassed from improper
storage.
On Wed, Aug 17, 2022, 2:00 PM 'Ian Vine' via neonixie-l <
neonixie-l@googlegroups.com> wrote:
>
> OK $191 per untested tube! Bit hot.
>
> Ian
> On Wednesday, 17 August 2022 at 18:29:48 BST, Audrey
> wrote:
>
>
> not
Even running more than 3 segments @20mA is actually out of spec as the
maximum ground and source current for the 74HC595 is 70mA. I found that it
didn't work satisfactory for an IV-19. Too high a voltage drop. Might be
okay for smaller numitrons though. I've ordered some TPIC6C595 instead to
tr
Must be someone in CONgress...
On Wed, Aug 17, 2022 at 1:00 PM 'Ian Vine' via neonixie-l <
neonixie-l@googlegroups.com> wrote:
>
> OK $191 per untested tube! Bit hot.
>
> Ian
> On Wednesday, 17 August 2022 at 18:29:48 BST, Audrey
> wrote:
>
>
> not my listing obviously..
> https://www.ebay.com/i
Let's keep the forum non-political please. It's bad enough out there as it
is... :)
Nick (Mod)
On Wed, Aug 17, 2022 at 11:23 AM Nick Andrews
wrote:
> Must be someone in CONgress...
>
> On Wed, Aug 17, 2022 at 1:00 PM 'Ian Vine' via neonixie-l <
> neonixie-l@googlegroups.com> wrote:
>
>>
>> OK $
I’ve had great experience with the TPIC6B595s, I used them to drive a whole
bunch of miniature bayonet style bulbs for a clock using IEE one plane
readouts, no problems with them so far. Probably a little over 120 mA per IC.
> On Aug 17, 2022, at 8:12 PM, Christian Riise Wagner
> wrote:
>
>
Quite the number of tubes.
Since he is asking retail for them all, and not likely too many people want or
can afford that many, I asked if there was a guarantee since if even 1 could be
bad, it would make almost the entire order non-profitable. Awaiting a response.
Michail
From: neonixie-l@go
Yeah. It's silly to sell them all as one lot, and even sillier to not
figuring out how to test them for that pricepoint...
On Wed, Aug 17, 2022, 6:30 PM Michail Wilson wrote:
> Quite the number of tubes.
>
> Since he is asking retail for them all, and not likely too many people
> want or can aff
Some people like to put all the risk onto the buyer. I tend to not deal
with people like that.
On Wednesday, August 17, 2022 at 3:37:15 PM UTC-7 tntm...@gmail.com wrote:
> Yeah. It's silly to sell them all as one lot, and even sillier to not
> figuring out how to test them for that pricepoint.
Remembering some older surplus places prior to the internet.Polypaks was one of
them that had a printed flyer or ads in the back of electronics magazines. They
often displayed this disclaimer with some of their products, "... No time to
test 'em!" Of course, B-7971's were two for $8 with the U
Seller is probably testing the waters to see if anyone take a BIG bite.
Next step is to break-up into smaller lots.
On Wednesday, August 17, 2022 at 3:48:27 PM UTC-7 Jeff Walton wrote:
> Remembering some older surplus places prior to the internet.
>
> Polypaks was one of them that had a print
If they were tested and guaranteed that would be one thing, but throwing a
bunch of these in a box as-is and charging top dollar probably won't get
them moving any time soon...
On Wed, Aug 17, 2022, 7:24 PM gregebert wrote:
> Seller is probably testing the waters to see if anyone take a BIG bite
Regarding using the 74HC595s, it's true that they are technically out of
spec if too many segments are on, but I believe the failure cause would be
whole chip heating rather than the single output transistors, and
especially with the PWM dimming going on (the segments are never on 100%,
since t
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