Re: [neonixie-l] Changes to eBay Purchase History

2023-04-21 Thread Charles MacDonald

On 2023-04-21 19:26, Mac Doktor wrote:
Is it just me or is there now no way to see if a seller has left you 
feedback? It's also much harder to discern whether or not you've left 
feedback, especially if you have my eyesight.


yes, latest update no longer shows any staus, other than payment  (I 
only buy on e-bay) Don't know where you would look for feedback.


they also expire old listings sometimes faster than it takes to receive 
things from across the Ocean.


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Re: [neonixie-l] Are numitron illegal in UK ???

2023-04-13 Thread Charles MacDonald

On 2023-04-13 15:57, Benoit Tourret wrote:

I tried to buy some IV-16 in a foreign country, far over the channel.
here is the message I just received from ebay:

Hello Benoit,

The purchase you recently made under the International Delivery Service 
with  could not be completed.


The object in question has been restricted. This may be due to import or 
delivery restrictions, or International Delivery Service eligibility 
requirements. The item will not be sent to you, nor will it be returned 
to the seller.


I have heard of this happening before with CRTs sold on e-bay  But of 
course their is NO way to get a detailed answer from E-bay.


Ebay uses a couple of international shipping services, it used to be 
Pitney Bowes, although some items I recently got from the States spent a 
week traveling around Chigago before being remails by an outfit called 
Ascntia which is apperntly part of SWISS post!


the shipping center receives the goods and shipps them in Bulk to the 
destination country where they are cleared in Bulk and then delivered by 
one of many Local courier companies.   You might see if you can still 
see the detailed tracking information to see where the shipment got 
derailed, - ikly at the shipping cneter in the UK in this case.


I wonder if the parts were marked "Russia" and so were considered 
subject to boycot?


I wonder if the seller got stiffed for the price of the goods and the 
shipping to the reship center?


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Re: [neonixie-l] Re: IC Sockets

2023-02-18 Thread Charles MacDonald
something in a high vibration environment like a vehicle will give you 
more problems. Corrosion is another 'issue'.. but if it's that bad you 
should be coating your boards anyway.


back in the 70s I delt with Apple ][ Computers that  used socket-ed DIP 
ICs  problems Noted:


bad contact - corrosion.
loose IC due to vibration.
they went for Premium AMP brand sockets to get better retention and some 
of the ICs left the factory with one or more the pins bent under.  this 
worked at first, BUT made for Flaky INTERMITTENT contacts.


Also the socket will have more capacitance then just a plain PC Board, 
which might round off your signal edges.  I think we even had one board 
where the larger area of the contacts caused a solder bridge, and 
pulling the socket was more difficult than just pulling an IC would have 
been.


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Re: [neonixie-l] Interesting NOS Neon bulbs

2023-02-12 Thread Charles MacDonald

On 2023-02-12 00:49, gregebert wrote:
I had a bulb similar to the NE42, except it had a standard Edison base 
and worked in a lamp socket. Oddly, no series resistor required; maybe 
it was hidden inside the base ?


One manual I saw years ago indicated that Neons with Screw bases were 
generally equipped with a built in resistor, and ones with Bayonet bases 
were not.


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Re: [neonixie-l] Time Code Translator with Nixie "clock" display

2023-01-23 Thread Charles MacDonald

On 2023-01-22 10:57, Mac Doktor wrote:

I've never seen this one before:

https://www.ebay.com/itm/364119298468 
<https://www.ebay.com/itm/364119298468>


for resolving and displaying  SMPTE time code which can be recorded as 
an audio signal and contains Hours, Minutes, Seconds and Frames for 
editing audio/visual information.


https://en.wikipedia.org/wiki/SMPTE_timecode


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Re: [neonixie-l] Why tungsten wire and why weld copper to tungsten? Also book recommendation?

2022-12-26 Thread Charles MacDonald

On 2022-12-26 15:26, Miles Thatch wrote:
1) I was watching some nixie production videos and a question came up. 
Is tungsten wire used because this metal offers the most appropriate 
seal with glass? One of the videos where a nixie was made in a garage 
showed that tungstan turns a coppery color when, as commented, properly 
seals with the glass.


Vacuum tubes often used DUMET wire as it had the same cofeficent of 
expansion as the Glass used to make the seals. https://www.dumet.net/


their are literally BOOKS on the subject of Glass to metal sealing 
depending on Power levels and temperatures involved.



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Re: [neonixie-l] Bubble Lights and other Christmas Lights of interest

2022-11-28 Thread Charles MacDonald

On 2022-11-28 18:29, Mac Doktor wrote:



If you're a Lionel train fan, NOMA made the famous talking railroad station.




Terry Bowman, KA4HJH
"The Mac Doctor"



Canadian Tire has the rights to the NOMA name here in Canada these days 
(and possibly elsewhere) , and uses it for everything from AA batteries 
to Lawn Mowers.


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Re: [neonixie-l] Strange eBay listing text.....

2022-10-05 Thread Charles MacDonald

On 2022-10-05 17:17, Mac Doktor wrote:




I just clicked the eBay photo for a GR10G Nixie listing and now I 
wonder what eBay is up to: https://www.ebay.com/itm/115546867348 
<https://www.ebay.com/itm/115546867348> the title is funny but 
clicking the link "Show original title" shows the correct title.


Classic screw-up on the part of the seller. Just another day on eBay.


More likely e-bay attempting to use AI to be "helpful"  May match the 
number of a CD or something.


I am always looking for Darkroom Equipment made by a German company 
called JOBO.  E-bay assumes that I want to see items called HOBO, or 
BOHO.  a certain HO gauge train car seems to come up regularly. And I 
don't even have a train set.



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[neonixie-l] Ukraine Sellers

2022-09-05 Thread Charles MacDonald

On 2022-09-05 17:51, Instrument Resources of America wrote:
I have not looked into this yet, but my suspicions are that most of what 
is being shipped from Ukraine must be far removed from the fighting and 
war zone.    Ira.


I have seen quite a few listings for Camera and consumer electronic 
related items from Ukraine. one's I have purchased on E-bay the sellers 
often write to be sure that I am aware of what might be a two month 
shipping delay.  selling on e-bay is one of the few ways for someone to 
make money under the invasion conditions.  SO far so Good as far as 
receiving the goods.  Currently expecting some empty recording tape 
reels in pastel colours.



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Re: [neonixie-l] ¿ mystery digivac ? does anyone have any info?

2022-08-25 Thread Charles MacDonald

this has an exaple of the Previosu Model :

  http://www.decadecounter.com/vta/articleview.php?item=68


On 2022-08-25 19:26, Audrey wrote:


it uses a 10 pin base instead of a 9 pin base like regular digivacs,
If anyone has a clock that uses these or has one of these tubes or has a 
tung-sol databook please chime in! I would really like to know the part 
number!toob.jpgfaces.jpgback.jpgbase.jpg


I am assuming that it is a T-1704C


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Re: [neonixie-l] FS: 5 NOS 5870

2022-08-20 Thread Charles MacDonald

On 2022-08-20 14:25, David Forbes wrote:

Max,
Thanks for the photo. These JRC tubes look very similar to Japanese 
Burroughs B-5870 tubes. It's likely they were made in the same factory, 
but I don't know whose factory it was.


JRC?  (Japan Radio Company)

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Re: [neonixie-l] Dekatrons on Jeopardy! ?

2022-08-11 Thread Charles MacDonald

On 2022-08-11 13:27, Jeff Malins wrote:

Those are 7236 double triodes. Definitely a vacuum tube.

Given the layout, I think that is a picture of the core memory 
amplifiers on the SAGE (AN/FSQ-7) computer.


yep - a it look like a regular tube to me...

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Re: [neonixie-l] It Lives!!!!

2022-07-08 Thread Charles MacDonald

On 2022-07-08 16:53, Mac Doktor wrote:

What did you use as the thermal sensor? All of the off-the-shelf devices 
are calibrated in Celsius. For Fahrenheit the number is simply 
multiplied by 9/5 and offset by 32. 


I have the opposite problem, my commercial thermostat only can be set in 
Whole degrees.  I prefer 22.5C which can't be set.  It is so long ago I 
forget what those forgnheat numbers mean.


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Re: [neonixie-l] Neon signs

2022-05-13 Thread Charles MacDonald

On 2022-05-12 13:38, liam bartosiewicz wrote:
High voltage like that from a microwave oven transformer terrifies me, 
I’ve only just begun to make things that take power directly from mains 
and not a wall wart. It’s no wonder why people say MOTs kill more 
electronics hobbyists than anything else.


"big clive tobin" on you tube explains it well.
https://www.youtube.com/watch?v=FBeSKL9zVro


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Re: [neonixie-l] Re: B7971 tubes for sale - $150 each

2022-05-06 Thread Charles MacDonald

On 2022-05-06 08:20, Robert G. Schaffrath wrote:
Poly Paks, Meshna, et al. By 1979 used tubes were $4/each and NOS were 
$5/each at Meshna. I bought a few NOS that I still have but looking 
back, yes I wish I had bought more. But, honestly, what to do with all 
of them back then? They were still pretty common.


etco in Montreal had them both separate and with the boards, although 
the boards had the fingers broken off for the gold.  I think the whole 
module was about 10 Bucks CANADIAN.



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UV Re: [neonixie-l] Info on IN-3B lamps

2022-02-16 Thread Charles MacDonald

On 2022-02-16 20:22, Mac Doktor wrote:

I need to do some research on that as it spoils my Halloween videos. I 
have camcorders with both CCD and CMOS imagers and even with the 
exposure greatly reduced a 15W "black light" fluorescent tube is so 
bright that the blue and red pixels are fully saturated at 255.


A regular "UV" filter (not a skylight filter, although those are 
supposed to be a more aggressive cut) does not help?  I know with some 
camcorders you would have to tape the filter to the front of the lens. 
The UV filters were intended to cut the Blue Haze when using Kodachrome, 
and so some sold these days are just "Protection" filters to keep the 
lens clean.


Might be worth a test with both the UV and Skylight to see what happens.

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Re: [neonixie-l] Nixie in Video game spotted.

2022-02-03 Thread Charles MacDonald

On 2022-02-01 16:43, Michail Wilson wrote:
https://www.reddit.com/r/VRGaming/comments/shtsx0/hell_road_vr_30_sale_on_steam/ 


whoever designed the game is not only not indicating the multi-planar 
nature of Nixes, But lso has a motorcycle with a thought controlled 
throttle, as the rider is changing speed with a gun in their throttle hand.


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[neonixie-l] Sylvania Florotron Display. 8894

2022-02-03 Thread Charles MacDonald
According to the original data sheet the 8894 is  more or less standard 
7 segment VFD.  clipping from the TCA Data Cache.



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the Magic E-mail header Re: [neonixie-l] Just how smart is google groups.

2022-01-17 Thread Charles MacDonald

On 2022-01-17 9:24 a.m., Joe Croft wrote:

Hi All,

This is just a test. Being lazy, I sent an email to the group as a reply 
to the last post and changing the subject line, but it looks like Google 
groups grouped it to the original conversation. That or I don't know how 
to browse the list on google. Either way, it is obviously smarter than I!


if you look at the header of an e-mail you will sometimes find "in 
repley to" and a message number.


many mail lists will use that header to group related mails, even if the 
subject changes slightly.


this is why many list moderators will tell you to start a BRAND NEW 
message with every new topic.



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Re: [neonixie-l] Vintage Electronic device with Nixies, need help identifying.

2021-10-17 Thread Charles MacDonald

On 2021-10-17 3:13 p.m., Victor Dekhtyar wrote:

Hey all!


The problem is I have no idea what this equipment does or what a dual 
preset controller is used for. The owner who sold it, also had no idea 
what it is. If anyone knows anything about this, info is greatly 
appreciated!


My guess, and it is just a guess is that you set a count you want to 
acheve and every time a an external machine does an operation, the count 
goes up, and when it reaches the preset number - it tells the machine to 
stop.  Think of a printing press being set to make 500 copies.



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Re: [neonixie-l] Re: Jeff Thomas Nixie - New Site, B7971 FLW Nixie Kits, Tubes for Sale

2021-10-13 Thread Charles MacDonald

On 2021-10-13 8:56 p.m., Christian Thomas wrote:

Ah thank you!  That WWVB clock is definitely neat! ...  🤣 Pretty cool that 
there's still the
reference radio signal being broadcast to this day. 


there are quite a few mass produced clocks and weather stations that use 
that WWVB signal...


for example 
https://www.marathonwatch.com/collections/wall-clock-digital/products/atomic-wall-clock-with-8-timezones?variant=7502742585386




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Re: [neonixie-l] Corvair instrument panel is lit up

2021-08-14 Thread Charles MacDonald

On 2021-08-14 9:08 p.m., peter bunge wrote:
I built a digital tach for a Corvair many years ago and wrote it up for 
Radio Electronics.

You can see the article here in Radio Electronics Apr 1973
https://worldradiohistory.com/Archive-Radio-Electronics/70s/1973/Radio-Electronics-1973-04.pdf 
<https://worldradiohistory.com/Archive-Radio-Electronics/70s/1973/Radio-Electronics-1973-04.pdf>


such fun to look at that issue, even if this snip is enough to make 
Nixie fans cry.


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Re: [neonixie-l] Interesting kit...

2021-04-29 Thread Charles MacDonald

On 2021-04-29 8:26 p.m., Nicholas Stock wrote:
1382%7Cparentrq%3A202a065d1790a69d56791051efa8%7Ciid%3A1


 no idea why they 
use a 7805 that size (aesthetics probably), but interesting nonetheless


the big TO-3 regulators were rated for higher current than the TO-220 
versions.  (although both assume you put them on Heat sinks.)


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Re: [neonixie-l] OT: How to convert composite video into TTL?

2021-04-12 Thread Charles MacDonald

On 2021-04-12 8:59 a.m., Adrian Godwin wrote:

To complete the trio : SECAM is Something Essentialy Contrary to the 
American Method, and PAL is Perfection At Last.


I recall hearing it as "Pay (for) Additional Luxury".

the early sets would have needed extra circuitry to decode the 
alternating lines. BUT the explanation at th etime was that microwave 
inter station transmission in Europe had not been built with colour in 
mind and PAL had sufficient error correction built in that it did not 
matter.



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Re: [neonixie-l] Cleaning old circuit boards and components without destroying them - what to use?

2021-01-15 Thread Charles MacDonald

On 2021-01-15 6:58 p.m., Adrian Pardini wrote:

On Fri, 15 Jan 2021 at 20:56, Dekatron42  wrote:


Photos doesn't work in Neonixie-L for me and some other memebers so 
unfortunately I can't include any just yet (time to move from Google Groups as 
it is working so poorly since their new design?).


Photos arrived fine here, I really like the look of those numbered disks.




for some reason, the photos arrived at the very bottom of the e-mail. 
Not the first time I have received a message that way.



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Re: [neonixie-l] Re: Fascinating film about 1960s colour CRT manufacturing

2021-01-12 Thread Charles MacDonald

On 2021-01-12 2:48 p.m., Paul Andrews wrote:
I have a whole bunch of Predictas. I'll try it but I doubt it will work 
because of the large gap between the CRT and the safety glass. Here are 
the two I have restored:


you can get a neon lamp to glow at the Plate cap of the Horizontal 
output tube, on tube TV sets.  NO doubt a Nixie could also glow.  while 
their is a bunch of High voltage on the other side of a CRT screen, it 
is DC and so will not give out a field.   The CRT  I am using to type 
this hardly shows any static when it is running.


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Re: [neonixie-l] Re: How close together do a controller and crystal need to be?

2020-12-27 Thread Charles MacDonald

On 2020-12-27 6:27 p.m., chuckrr wrote:
Well even thoughe electricity flowing through a wire is somewhat slower 
than the speed of light, exactly how much slower


is something I do not know about.   this install

order called for the use of a 100 foot cable.   The result was that the 
newly installed processor complex was unable to synch


up with the rest of the switch.   Nobody knew why.   I calculated that 
at the speed of light, the 12.352 mHz clock signal would be


late at the new processor by around half of a cycle.  


it is legendary that Rear Admiral Grace Hopper, (the Computer genius who 
is credited with the early computer language COBAL) used to had out 
little pieces of wire, cut to the length that would take one Nanosecond 
to travel.  "This Gentlemen is a Nanosecond".


she was of course attempting to get computer designers to make the 
interconnects shorter, as that would allow faster computers. as well as 
explaining lag in satellite communications.


https://en.wikipedia.org/wiki/Grace_Hopper#Anecdotes

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Re: [neonixie-l] Re: B7971

2020-12-03 Thread Charles MacDonald

On 2020-12-03 4:45 p.m., gregebert wrote:
Did anyone in this forum get their 7971's from PolyPaks a long time ago 
(1970s/1980s) ? I recall they were inexpensive, and many were sold in 
pairs along with the socket/driver board after being scrapped from 
Lectrascan units.


Good Old ETCO Electronics 464 McGill St. In Montreal.  (store is long 
gone)   Only got a couple of boards, which had the fingers broken off. 
and a bunch of the tubes, Forget the price but proably a couple of bucks 
(CDN) each.  If I could send a message back in time, I would tell my 
former self to buy a few more, as well as some surplus 2A3, 6L6 and 6V6 
tubes.



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Re: [neonixie-l] Re: Who is interested in IN33?

2020-11-09 Thread Charles MacDonald



Are here any Canadians who ordered tubes from Yuriy this time of the 
year, or from other Russian sellers?


Did you guys get your orders? How long did it take?

The reason I am asking is that my order from Yuri (Shipped on 30 
September 2020), according to the tracking, got to Canada on Oct 16:


about a month and a half is typical for things I have purchased from the 
Russian Federation or Ukraine lately.  if shipped "registered"  which is 
common when teh sender does not trust their own post office, it shows 
things down more.




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Re: [neonixie-l] Amperex 8453 Counter tube

2020-10-28 Thread Charles MacDonald

On 2020-10-28 8:23 p.m., peter bunge wrote:


Ehat does I.C. mean on pin 6? Or is it N/C as in Not Connected?


on most tube diagrams - IC means "Internal Connection".  the pin is 
attached to some part of the structure of the tube, and is not to be 
used.  NC is no connection and the socket pin is generally permissible 
to use as a tie point or terminal.


often the IC pin is used as a structural support, but the manufacturer 
does not want to promise that it will be to the same element on future 
production.



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Re: [neonixie-l] Dekatron quiz!

2020-10-28 Thread Charles MacDonald

On 2020-10-28 7:01 p.m., Jon wrote:

The DK25 is the only base-8 counting tube as far as I know, which is why 
the picture is truly diagnostic of the precise model of tube. Why Rodan 
made it, I have no idea, but it was a regular catalogue item not some 
weirdo developmental.


a lot of computers used octal notation for binary values, so an 8 
position counter may have been useful.  even today some internet 
variables are expressed in Octal.


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Re: [neonixie-l] Nixie Siting - Netflix

2020-09-17 Thread Charles MacDonald

On 2020-09-17 11:04 p.m., Michail Wilson wrote:

Obviously 6:10:47    Early morning.    Ha.


or that far into the mission.

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Re: [neonixie-l] red lens filter material.

2020-09-07 Thread Charles MacDonald

On 2020-09-07 5:56 p.m., Hannah Mishin wrote:
if u are looking for filters consider photo filters - along the lines of 
this:


https://www.adorama.com/le026s.html?gclid=EAIaIQobChMIj6uXyoTY6wIVqwiICR1SzwZsEAQYAiABEgKCcPD_BwE&utm_source=adl-gbase


or the "Rosco"  equivelents.  those are inteneded to be used over stage 
or studio lights to control the colour of the light, and they come in a 
literal rainbow of colours.  they are fairly thin, and so would likely 
need some sort of support.  The material is cheep enough that you could 
cut a band for each tube.


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Re: [neonixie-l] What is this HV gadget?

2020-06-25 Thread Charles MacDonald

On 2020-06-25 11:05 a.m., celzey11 wrote:

Supposedly they were designed for testing neon sign components, a quick way to 
see if a tube failed or not in the field without powering the whole thing up.



I got a similar one, it will light up one digit on a nixie tube.  also 
give you an RF burn if you get your finger too close.  Good for a 1 cm 
arc on a good day.



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Re: [neonixie-l] Re: Shipment delays from Ukraine

2020-06-16 Thread Charles MacDonald

On 2020-06-16 4:00 a.m., 'Ian Vine' via neonixie-l wrote:

I also had a delivery from Ukraine turn up yesterday.

r>.

received a camera I bought in early April last week from Ukraine, still 
waiting for one I bought at the same time from Russian Federation.



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Re: [neonixie-l] CRT colors

2020-05-29 Thread Charles MacDonald

On 2020-05-29 8:17 p.m., John Snow wrote:

Is there a model line of CRT tube that's available in different colors?

Alternatively; know of any analogue oscilloscopes that came in different 
colors?


many of the makers did offer other phosphors in 'scope Tubes.  BUT 
normaly the effort was to control the persistence of the glow.  Take the 
P7 used fro Radar displays for example.  a very short blue-ultraviolet 
display, followed by a 2 second or more yellow glow.  there was an 
Orange long phosphor also in some lines.


Sylvania even made some tubes with a two colour phosphor - which one 
glowed depended on a drive signal.


this link has scans of some of the standard versions from different firms.
http://w140.com/tekwiki/wiki/Phosphor


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Re: [neonixie-l] Re: Shipment delays from Ukraine

2020-05-18 Thread Charles MacDonald
then their are the really strange ones.  I bought a camera from Ukraine, 
about the middle of February.  No sign of it.  complained to the seller 
twice.  by the time i compalined, it was past the date to get a refund 
form E_bay.


today is a holiday here in Canada, but none the less, someone from the 
post office dropped two e-bay packages on my front porch.  one was the 
Ukrainian camera!!!


so I guess you have to go on a lot a faith these days.


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Re: [neonixie-l] Shipment delays from Ukraine

2020-05-14 Thread Charles MacDonald

On 2020-05-14 4:03 p.m., Adam Munich wrote:
Can confirm, saw a 3 week customs delay from Pochta customs, now my 
package has "left russia" May 4th with no updates since.


yes, I ordered a Zorki 4 camera from a seller in Ukraine on April 21.

Mailed the next day.
shows in transit to the country of destination, no further details

Enough to make you want to go to the beer store for a case of Slavutych. 
(Славутич)


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Re: [neonixie-l] Discovered an old advertisment

2020-04-03 Thread Charles MacDonald

On 2020-04-03 12:28 a.m., Richard Scales wrote:
Whilst looking for something else I discovered this from Wireless World, 
May 1975, I wonder if they've got any left?



B-7971AddWirelessWorld1975.JPG

Discount for bulk too  ... sigh


I bought the few I have from ETCO in Montreal.  I am afraid to touch the 
box were they are stored as the price has gone up so much.  some that 
they had were on boards where the edge connectors had been snapped off. 
I guess for recover the gold plating. (or maybe just to quickly 
disassemble the displays.)




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Re: [neonixie-l] Restore or scrap for parts?

2020-04-01 Thread Charles MacDonald

On 2020-04-01 2:27 p.m., martin martin wrote:

Hello all.
I was cleaning the office with all my "spare time" and found this!

Date code 1974!


reminds me of the commodore calculators I used to sell on my first job 
back in that time period.


what is wrong with the unit?  as someone else said that style keyboard 
is subject to contamination and it is easy to clean if you remove about 
30 screws and wipe the rubber parts with a swab and rubbing alcohol.


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2n3055 Re: [neonixie-l] Re: tiny little counter at a fair price!

2020-03-21 Thread Charles MacDonald

On 2020-03-21 10:18 a.m., 'jf...@my-deja.com' via neonixie-l wrote:

Almost every transistor manufacturer sold them.  I remember reading that 
the 2N3055 spec was so loose that they could re-mark their rejects for 
other part numbers.  Conversely, in most of my non-demanding 
applications (audio amplifiers, power supply pass transistors, etc.), 
most of the power npn transistors (e..g., TIP35)  were interchangeable 
as long as I did not exceed the actual BVceo.


a few numbers were registers with "loose" specs.

see attch (RCA 2n3055 is the right hand column).


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Re: [neonixie-l] P12 Phosphor CRT

2020-02-12 Thread Charles MacDonald

On 2020-02-12 5:12 p.m., Nicholas Stock wrote:
I bought a similar one that allegedly came from Los Alamos...5 gun. I 
think they made tubes with more guns than that even.


I know Sylvania made ones with two screens.  change the final anode 
voltage and the colour changes!  believe that those were Military only 
specials.


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Re: [neonixie-l] P12 Phosphor CRT

2020-02-12 Thread Charles MacDonald

On 2020-02-12 4:49 p.m., Mac Doktor wrote:

While we're on the subject, I have a five beam CRT that I snagged on 
ebay a few years ago. The auction listed the part number as "JAN CGV 
7YP2" but the number on the box is "JAN CDU 7YP2" and the date is 
"195"-something.


CDU is Dumont.

I'm told came from a Navy radar system and that it's the only one ever 
made with more than four beams. It would be interesting to hook that 
baby up to five different gadgets at the same time. 8D


well Dumont registered that one as P1, 2, 7, or 11. and two years later 
as a P4.


if you want to wire it up, there are quite a few pins to connect.

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Re: [neonixie-l] P12 Phosphor CRT

2020-02-11 Thread Charles MacDonald

On 2020-02-10 11:05 a.m., Nicholas Stock wrote:

Other tubes with P12 phosphor are 3JP12’s as far as I can tell. Some of the 
datasheets for others say they were available as P12, but I rarely find them 
for sale anywhere


the description from JEDEC says P12 was intended for radar. see attched)

some REGISTERED at P12 include 5CP12,5AJP12,7LP12,16AFP12, 7AGP12, 
3ACP12A, 19Wp12, 3BMP12, 17QCP12, 12AWP12, 5EKP12, 19DXP12.


the larger sizes are consistent with Radar use.

Sylvania or Dumont in Particular advertised that they would build ANY 
CRT with any available phosphor given a suitable sized order, so 
presumably any scope tube could have existed as a P12 - (or P7) version.


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Re: FS Re: [neonixie-l] P12 Phosphor CRT

2020-02-11 Thread Charles MacDonald

On 2020-02-11 1:07 p.m., Mac Doktor wrote:


On Feb 11, 2020, at 3:39 AM, 'Jan Wuesten' via neonixie-l 
mailto:neonixie-l@googlegroups.com>> wrote:


going to Jan's site in his signature the alternative address does 
connect securely


https://www.die-wuestens.de/eindex.htm




Hi there, I sell the 3JP12 NOS, see

https://www.askjanfirst.com/r5.htm



server must have a problem.
Error code: SSL_ERROR_INTERNAL_ERROR_ALERT



I can't connect to the server securely. Using an insecure link does:

http://www.askjanfirst.com/r5.htm


Terry Bowman, KA4HJH
"The Mac Doctor”

"Never install version point-zero of anything"

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Re: [neonixie-l] vintage calculators

2020-01-02 Thread Charles MacDonald

On 2020-01-02 3:06 p.m., alb.001 alb.001 wrote:
My first  calc. was a 4-function Rapid-Man from Eaton's Canada.  It cost 
me about $150 back in 1970  and I continued to use it at work in the 
pharmacy of the old Brampton Peel Memorial Hospital  - it was the first 
electronic calculator in the whole hospital - administration was too 
cheap to buy us any new high technology.


My first Job was selling calculators at Eaton's
there were many rapid man lines

800 series, handheld LED units
1200 series Neon 12 digit display, with panaplex or NEC readouts
1208 8 digit LCD desk unit bought from Rockwell
2000 series printing units with epson drum printheads and no display

in the back room we joked that they were made by "Rapidly Dated Systems 
and Equipment" as opposed to Rapid Data Systems



  I also had the first fax
machine in Brampton Ontario  it came from a Canada Government surplus 
sale  and when I printed out the transaction record the header was  "PMO 
Private Office Fax "   ie from Jean Chretien !!


Pharma Phil


-- Original Message --
From: Mac Doktor 
Date: January 2, 2020 at 12:19 PM


On Jan 2, 2020, at 12:09 PM, gregebert < gregeb...@hotmail.com 
<mailto:gregeb...@hotmail.com>> wrote:


I still have my $10 APF scientific calculator from 1976 which got me 
thru high school, college, and did my taxes on it for a few years 
thereafter.


The VFD display is still working nicely. Not programmable.


Our first calculator had a VFD and did square roots for some odd 
reason. No idea where it is now.


At this point I'm using an HP 35s. WAY more functions than I need but 
at least I've finally reached the point where RPN just seems natural. 
It's also quicker than the algebraic method which helps my brain a bit.


I used FORTH for a while and found the stack-based approach very 
intuitive. I daresay I was actually pretty good at keeping it all 
straight in my mind but that was many years ago on an Apple ][+.



Terry Bowman, KA4HJH
"The Mac Doctor”

"Never install version point-zero of anything"





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Re: [neonixie-l] Re: Argon Piranha

2019-12-17 Thread Charles MacDonald

On 2019-12-17 10:57 p.m., Mahdi Al Husseini wrote:
If only there were argon indicator lamps, I could light up 
the sculptured eyes...


they were made at one time "AR" series lamps. EXAMPLE ONLY:
https://www.ebay.com/itm/ARGON-AR-1-UV-UltraViolet-Discharge-Vintage-Neon-GLOW-Light-Lamp-Bulb-Free-Ship-/310322322168

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Re: [neonixie-l] How dangerous is 150V - 170V DC?

2019-10-28 Thread Charles MacDonald

On 2019-02-01 3:19 a.m., Thomas Kummer wrote:

 Or, is it the fact that 150-170V DC isn’t as dangerous as everyone makes it 
out to be? I mean either way I know I should be more careful. I guess what I’m 
getting at is what are the chances of me accidentally doing any significant  
harm to myself from a Nixie project?



it is not the Voltage that gets you but the current. !!!

dry hands and series resistance can keep the current down to levels that 
you can survive...


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Re: [neonixie-l] Re-plating tube socket pins, anyone have some experience?

2019-10-05 Thread Charles MacDonald

On 2019-10-04 4:33 p.m., Dekatron42 wrote:
I'd like to clean some tube socket pins in an ultrasonic bath to get rid 
of the green corrosion but I don't know how to re-plate them afterwards 
so they look like new and can be re-used.


only outfit I have seen advertising small plating outits is Eastwood, 
who mostly serves the Antique car market.


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Re: [neonixie-l] Re: OT: What are single sided screw clips/fasteners called in English?

2019-09-22 Thread Charles MacDonald

On 2019-09-22 10:27 a.m., martin martin wrote:

https://www.ebay.com/itm/8-Screw-X-7-16-Wide-X-9-16-Long-Spring-Auto-Body-Clip-U-Nuts-Lot-Of-25-Clips/132505056261?hash=item1ed9eab405:g:PlMAAOSwYSxahGre



these are closer to what the OP is looking for I think:
https://www.ebay.com/itm/8-32-Flat-Speed-Nuts-Tinnerman-Quantity-28/283429129737?hash=item41fdb14e09:g:5YQAAOSwVNxZ73Ui



On Sunday, September 22, 2019 at 6:36:41 AM UTC-7, Dekatron42 wrote:

I've been looking for single sided screw clips like these, but I
don't know the proper English word for them, so I only find the
"double-sided" ones that are supposed to go over the edge but I
can't used those in all positions where I need them - so what should
I look for?

/Martin

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Re: [neonixie-l] Re: OT : Natsemi clock module data wanted

2019-09-15 Thread Charles MacDonald

On 2019-09-15 3:57 p.m., GastonP wrote:
In this document (page 36) you will find references to the MA1020,23,25 
and 26...


https://www.datasheetarchive.com/pdf/download.php?id=9326ea4c9a6299c64664dd2312bd9801e69cc0&type=O&term=MA1002


I remember getting the 12Volt module and installing it in my then 
current 1979 Dodge Omni.  Few cars of that category had a clock.




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Re: [neonixie-l] B7971 DUSTOFF IOT Board with IR Reciever

2019-08-05 Thread Charles MacDonald

On 2019-08-05 7:46 p.m., Bill Notfaded wrote:

I too grew up with RPN and HP calculators in school!  At first it made no sense 
to me but after using for years and becoming a CIS major it makes perfect sense 
now because postfix works the way the machine does.


I guess I was lucky, I had an after high school job selling calculators 
and when HP started offering the HP-21 in stores, the sent a rep to give 
the store folks a half day course on how to sell them.  And yes, Hp said 
that dropping them on the counter to show how rugged they were was an 
aceted Sales technique.




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Re: [neonixie-l] B-16851453 nixies

2019-07-25 Thread Charles MacDonald

On 2019-07-25 2:54 p.m., David Forbes wrote:
That looks like the original Xerox machine copy counter. It had three 
rotary switches whose shafts we see, along with bulbs to illuminate the 
numbers, to the right of the Nixie tubes.


Xerox and others often had the makers of parts put ONLY the Xerox part 
number on a part.


I have some 25L6GT power pentode tubes stamped only with an IBM Part 
number.  (IBM used them as solenoid drivers in Key Punch machines)


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Re: [neonixie-l] Re: Power for six (6) GR10G Nixies: 300VDC @ 40mA - small switching PSU?

2019-07-15 Thread Charles MacDonald

On 2019-07-15 4:54 p.m., Dekatron42 wrote:
@ gregebert: I'd prefer not using rectified mains, I might use two 
transformers back to back or one isolation transformer with secondaries 
like the primary to get some isolation - knowing myself I'd better use 
some isolation... I sometimes wonder why I am not dead from all the 
shocks I've got, the worst still show scars.


Why not use one of the "Hammond Classics Tube power transformers".you 
would need to bring in the Mains to the primary, But that can all be in 
an enclosure.  for example the 260 series.

http://www.hammondmfg.com/260.htm

400V CT and a couple of 1N4007 and perhaps a filter cap. (if you need 
pure DC.) Extra 6.3V at 2A winding to run your digital stuff.



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Re: [neonixie-l] 110 or 220 at 50 or 400 Hz Russian multimeter translation

2019-07-11 Thread Charles MacDonald

On 2019-07-11 8:09 p.m., alb.001 alb.001 wrote:
The switch next to voltage is 50 or 400 Hz.  Not really compatible with 
North American 60 Hz.   Only place I see 400 Hz is in aircraft systems, 
not common usage.   Does it use the input frequency for a time base ?


there is a lot less iron needed in a transformer for 400Hz.  so probably 
the 400hz side cuts out part of the winding of the transformer to 
compensate.  a 50Hz transformer should be close on 60Hz.  I have an 
ancient TV set that I used for about a year when I was a kid before I 
noticed it was a 25Hz set.  In that case, again the transformer was 
massive and so the internal voltages were so high that the Picture tube 
was very worn.



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SwissNixie Re: [neonixie-l] Re: What does your shop look like?

2019-07-09 Thread Charles MacDonald

On 2019-07-09 2:24 p.m., SWISSNIXIE - Jonathan F. wrote:
this makes it easy to find a tube 
and also know exactly how many you have (left). Also it allows me to 
quickly check if i already own a tube when i see an action. 
One of my other hobbies is the interest in radiation and nuclear related 
stuff and hobby gamma spectroscopy, for this i also have a table where 
all the items are. 


so you can tell us how many Nixie makers used a radioactive additive to 
ensure that gas fired right away   :)


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Re: [neonixie-l] Really??

2019-07-09 Thread Charles MacDonald

On 2019-07-09 6:45 p.m., Mac Doktor wrote:


On Jul 9, 2019, at 5:03 PM, Mark Moulding <mailto:urros...@att.net>> wrote:


This just came across my in-box.  I was looking at that 
"Candy-Ferrari" clock (for $10k).  I think eBay's database must have 
screwed up somehow...


It says "local pickup" with no shipping option and it's in Romania:

https://www.ebay.com/itm/IV11-VFD-tubes-Nixie-era-alarm-clock-thermometer-assembled-kit-NEW-VERSION/323853594090



shows as Shipping:
$25.80 Standard International Shipping | See details

(that would be to Canada in my case.)

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Re: [neonixie-l] Re: Mullard ZM1200 Pandicon available

2019-06-28 Thread Charles MacDonald

On 2019-06-28 5:04 a.m., Roddy Scott wrote:
EDIT - Philips bought out Mullard in 1928 but still marketed tubes under 
the Mullard label - I should use Wikipedia more often! Valvo was a 
German company 


Philips was a company of many names.  they had an internal system of 
etch marks with a code for date, design and factory that made a given 
tube.  (not sure if the "specials" would get the full code.)


in each country they sold tubes they used the "local" name, like Mullard 
generaly a firm they had bought over the years.  So Amperex, Philips, 
Miniwatt, Rogers, Pope, Mullard, and several others were all valid, and 
often were applied by the local distributor.


https://frank.pocnet.net/other/Philips/PhilipsCodeListAB.pdf

 is proably a good start

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Re: [neonixie-l] Odd but cool display

2019-06-10 Thread Charles MacDonald

On 2019-06-10 7:53 p.m., Terry S wrote:

The data sheet specifically says LED.


HP at one time made their own LED devices for Calculator and other 
displays.  Calculators like the HP-35 have HP made LED displays.


eventually - the available devices got better and cheaper and they exited.

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Re: [neonixie-l] Re: Burroughs logo/letterhead scan needed

2019-06-03 Thread Charles MacDonald

On 2019-06-03 9:44 p.m., Hannah Mishin wrote:

I took the scan and vectorized the graphic.
The less than good looking vectors are direct translation
The image to the right is a cleaned up version.
I can split them if you don't have the software. just let me know.


Immpresive

I looked through several more of the 20 some odd registrations that they 
did for various electron tubes, and noticed that several also had this 
logo, BUT the JEDEC files just show it this small.  Doubt if you could 
pick up the type, although I guess that you would not want that anyway.



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Re: [neonixie-l] UK product shipping to the USA? MCTA030/12

2019-06-03 Thread Charles MacDonald

On 2019-06-03 6:38 p.m., Mac Doktor wrote:

Wouldn't they have to pay a significant VAT on the purchase before 
sending it to you?


if shipping outside the EU, the rules in most countries rebate the VAT. 
BUT the distributor is question is part of a wider international chain 
and so they are probably only set up to ship from the UK to the UK.


the delay quoted may well come from an estimate of teh time to ship from 
the UK to their HQ, and reship to the customer.


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Re: [neonixie-l] Burroughs logo/letterhead scan needed

2019-06-03 Thread Charles MacDonald

On 2019-06-03 4:44 p.m., Mac Doktor wrote:
I'm still toying around with a logo for the theoretical NixieBase 
project. I need a really good hi-res scan of the words 
"Burroughs Corporation"  as used in their documentation and packaging so 
I can trace the capital letter "B". I'd like to have the "B in a circle" 
logo as well.


these are from the last Bouroughs Nixie registration

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Re: [neonixie-l] Re: IN-28's in real life...

2019-05-31 Thread Charles MacDonald

On 2019-05-31 10:36 p.m., Terry Kennedy wrote:
 Gandalf Quad PACX IV which was a 1024-terminal to 
512-host-port concentrator. Each port had 4 red LEDs, so a total of 6144 
LEDs. It also had a "lamp test" button. I bet you can see where this is 
going... Those LEDs gave off enough IR that you could feel it from quite 
some distance away 


I was always sad about Gandalf, they kinda Zigged when everyone else 
zagged.  Way Back when I recall showing one of their engineers one of 
the First HAYES modems -and I asked why Gandalf was not in the market. 
He answered that PCs were Kids stuff, and that they only made products 
for data centers.


I also recall lightly  hacking a PACX one time.  The computer I wanted 
at a certain local site had limited dial up lines, but the site where it 
was had other lines for commercial users - dialing up that line the PACX 
asked me to provide the "CLASS" I wanted and was happy to connect me.


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Re: [neonixie-l] Nixies spotted

2019-05-26 Thread Charles MacDonald

On 2019-05-26 8:35 p.m., Steven Donaldson wrote:

https://www.americaspace.com/2019/05/26/we-didnt-know-the-questions-remembering-apollo-10-50-years-on-part-2/

Plus may be of interest in general...


numeric display in the first photo look more like incandescent 
projection displays.


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Re: [neonixie-l] Pricing Insanity

2019-05-12 Thread Charles MacDonald

On 2019-05-12 4:40 p.m., Robert L wrote:


At least this seller adds exclusive packaging!



which is shipped without an over-wrap will almost certainly NOT prevent 
breakage.



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Re: [neonixie-l] Re: Hewlett Packard Power Cord

2019-05-09 Thread Charles MacDonald

On 2019-05-09 5:51 p.m., Bill Notfaded wrote:
There has been talk over the years of remanufacturing them again but 
it's never happened... yet!



Wonder if they would no longer meet the Electrical standards -  I have 
some projectors which have a connector which has 2 prong blades like a 
power cord, recessed in a round opening.  The Old cords that came with 
them look just like an extension cord and Just clear the opening. 
modern cords have to be quite a bit larger so that one cannot bypass the 
ground pin.


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Re: [neonixie-l] Re: Tube/bulbs for colon separators?

2019-04-27 Thread Charles MacDonald

On 2019-04-27 1:07 p.m., David Eustace wrote:

IV15 vfd


there was a similar Philips tube the 6977.  which could be masked to 
make a colon ;



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Re: [neonixie-l] OT: audio levels

2019-03-29 Thread Charles MacDonald

On 2019-03-28 10:09 p.m., johnk wrote:


An aside: now that we are talking audio, I would love to get an argument going 
about Watts RMS !
I say this:  the watts specified for an amplifier output are intended to be 
average power and not rms power.



Any takers?


I do recall that the merchants is North America got into a bit of a 
"Horsepower Race" with Power ratings on consumer audio equipment.


rather than accept a low number the marketing engineers, started doing 
things like testing with Pulse inputs to use the electrical capacity of 
the Filter caps.  even further some only tested One channel, (so the 
power supply was idling on the other.) or connecting a big lab supply as 
Music is different than sine waves. You started seeing Peak Music Power 
ratings.


the FTC in the States started cracking down and said that any power 
claims had to be based on teh RMS output (.707 of the peak) using a sine 
wave with Specified distortion. AND that the unit had to be conditioned 
at almost maximum power (75% if I recall, or Perhaps 90%)for several 
minutes before taking the measurement.  SOME units sudenly could not 
show ANY power as the pre-conditioning was enough to cause them to shut 
down or Melt down.


I recall seeing a sears catalogue (here in Canada) which showed a 100W 
stereo, with a small text box titled Truth in Audio stating the the unit 
was good for 2W under the US FTC method.


So we can blame the US for inventing "RMS Power" - although they were 
really trying to do the right thing.


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Re: [neonixie-l] OT: Reasonable quality step-up converter?

2018-11-04 Thread Charles MacDonald

On 2018-11-04 3:17 p.m., jb-electronics wrote:

Hi again,

Thank you for all your advice. I I am located in Alberta, far away from 
Ontario, so I had to find some other solution. I should mention that I 
live on campus (doing my Ph.D.) and so I do not have any access to the 
breaker panel or any 240V outlets in the building. I ended up getting 
the Krieger 450W step-up converter for around CAD 85 (including 
shipping),
So I hooked it up to the step-up converter and I get a very strange 
behavior: http://www.youtube.com/watch?v=ZC47kkjh1sc


how clean is the output of your inverter? some just output square waves, 
which might be confusing the processor in your soldering station. it 
almost looks like it is getting a "reset" and rebooting.


many folks have the same problem with inverters that run 110V stuff of 
their 12V system in a Motor Home or car.


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Re: [neonixie-l] OT: Reasonable quality step-up converter?

2018-10-24 Thread Charles MacDonald

On 2018-10-24 2:20 p.m., jb-electronics wrote:

Hi folks,

This is a bit off-topic, but I hope somebody can help. As some of you 
know I live in Canada, but I am originally from Germany. Most of my 
tools can be switched between 110V/220V input, so that's fine, except 
for my soldering station. It is a Weller 40W digital station that I have 
had for years and I do not want to buy a new one. The problem: it only 
has a 220V input.


In order I would look to see if the unit has atrasnformer with two 
primary windings connected in series... if so connect them in parrall. 
That is a common way that North American designers tackled the European 
market


second would be to see if a standard transformer could be swapped in. 
you would have to determine what the output voltage would be, and then 
look in the Hammond Catalog to find a good cadidate.


http://www.hammondmfg.com/5cpwr.htm

third would be the hammond autotrasnformer

http://www.hammondmfg.com/pdf/5C_298.pdf

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Re: [neonixie-l] 12 digit Japanese panaplex-like tube 1972

2018-10-18 Thread Charles MacDonald

On 2018-10-16 10:40 p.m., J Forbes wrote:
I was cleaning up some stuff in my shop and came across a Unitrex 1200 



it has a 12 digit neon 7 segment display.

There must be something fun I can do with thisany ideas?


Add - Substract  - Multiply and divide...  one of the units the place I 
worked at out of high school had in their line.   the unitrex units were 
well made, one of the few brands that reliably worked out of the box.


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Re: [neonixie-l] Time for my annual (?) question...mostly for David F....

2018-06-15 Thread Charles MacDonald

On 18-06-15 12:01 PM, 'Grahame' via neonixie-l wrote:
I've read that for green phosphors, P31 is supposed to be "tougher" than 
P1. But I've not seen data that compares phosphor life between other types.


Looked up the Original Registration by Mullard for P31, P32 and P33. 
Document gives persistence and Spectrum curves but no claims for 
lifetime. Zinc Sulphide with a copper activator.


Registered in 1960 under release 2746 along with type CRT 9RP33, which 
corresponds to Mullard type AL22-10.  (P33 is Orange BTW)


(Having the JEDIC data is So handy, everyone should immediately send 50 
bucks US  to the Tube Collectors Association to get a copy)


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Re: [neonixie-l] Ever seen this?

2018-05-10 Thread Charles MacDonald

On 18-05-10 03:11 PM, SWISSNIXIE - Jonathan F. wrote:


Found this by accident
https://www.ebay.com/itm/Old-vintage-NOS-NU-IDPI-144-Made-in-USA-radio-antique-apparatus-vacuum-tube/263659229862

Look at the white top, kind a looks like a neon bulb coating 
(flourecent), but why would a neon buldb have so many pins?


Could that be a small crt tube like the NIMO ones?


Very small CRT - will try to attach descripion

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Re: [neonixie-l] Re: New to group, building with B7971s

2017-11-26 Thread Charles MacDonald

On 17-11-25 06:43 PM, Tim G wrote:
I tried to include a couple photos, but every time I insert a photo in a 
post, posting fails with "An error occurred while communicating with the 
server. Reload"Are photos not allowed?


how big are your photos?  some internet providers will block any e-mail 
over a given size.


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Re: [neonixie-l] Why is there no "prefix" special symbol Nixie tube in the ZM102X / Z56X series?

2017-10-04 Thread Charles MacDonald

On 17-10-04 04:37 PM, Tomasz Kowalczyk wrote:
I think there are no known (to the internet) tubes in that series other 
than standard -,+,~ tubes. I don't know why no one decided to throw 
extra symbols in the existing tubes or nobody made an extra tube - 


some makers did offer to make "special symbol" tubes on a private order 
basis, but that would have meant the customer (equipment maker) would be 
in charge of supporting replacements for their customers.  Much easier 
to stick some Ne-2 Lamps behind a bezel with captions.


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Re: [neonixie-l] Spotted on Ebay: B6091/NL8423 nixies (larger 20mm/0.8 inch). Manufactured 1985

2017-05-05 Thread Charles MacDonald

On 17-05-05 12:25 AM, gregebert wrote:


I was surprised to see the 8522 date-code; the only other tubes I've
encountered that were manufactured more recently are from the USSR.


A couple of years back Tim Lang managed to get a closeout of some Nixies 
from Richardson/National and they were totally unmarked.  I belive 
Richarson bought up Very large stocks of any tubes thay would get their 
hands on in "warehouse" condition mostly, and Box and Brand them 
"National Electronics" when they get an order.  The date code would be 
applied along with the branding.  They probably will also box and Brand 
to the customers brand on request.  (I have lots of receiving tubes made 
by GE in Kentucky which are branded RCA, Amererex and other brands, 
where the boxes have a KR part number, KR standing for Ken-Rad the 
original owners of that factory (EIA CODE 188-5))



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Re: [neonixie-l] Re: Raspberry PI controlled Nixie display

2017-04-15 Thread Charles MacDonald

On 17-04-15 02:55 AM, Nick wrote:

You could always use a genuine real-time o/s like ChibiOS/RT ..


At one time their was a group working on a real time linux kernel...

https://www.linux.com/blog/intro-real-time-linux-embedded-developers

https://wiki.archlinux.org/index.php/Realtime_kernel

would that be close enough?

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Re: [neonixie-l] Re: Radioactive Nixies - Study

2017-03-12 Thread Charles MacDonald

On 17-03-12 04:56 PM, gregebert wrote:

1 tube may produce 0.4uSv/Hr, but a clock with many more tubes will
produce more radiation. I have a total of 47 nixie tubes operating in my
home, plus another 6 at work. However, most of my tubes are at least 50
years old, so I'm not too concerned.



But how many Bananas and Brazil nuts do you keep around.  those are the 
real home based radiation sources...



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Re: [neonixie-l] Re: How ICs are made - the inside track...

2017-01-25 Thread Charles MacDonald

On 17-01-24 03:14 AM, Roddy Scott wrote:
Processor chips

may have gotten a little bit bigger but not by much but could you
imagine the size of a computer based on the ENIAC
<https://en.wikipedia.org/wiki/ENIAC> technology and the power
requirements? The original consumed 150KW and weighed about 30 tons, a
modern day version would need its own power station and would take up a
football stadium


Ah but you are forgetting as Admiral Hopper liked to point out, the size 
of a nanosecond.  A football stadium sized computer could not get out of 
it's own way.


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Re: [neonixie-l] tube coil OT

2016-11-28 Thread Charles MacDonald

On 16-11-28 07:06 PM, 'westdave' via neonixie-l wrote:

coils in tubes ? found two at the swap meet  what? why?  ?
could one make a LC neon flasher?


could it be a relay?  or perhaps a time delay?


or maybe a RF coil sealed in a vacuum or some inert gas to avoid 
humidity problems.


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Re: [neonixie-l] RTC chips that behave nicely with crystals

2016-11-02 Thread Charles MacDonald

On 16-11-02 01:34 PM, John Rehwinkel wrote:


I got a few laughs from a $1 Chinese RTC board; wickedly inaccurate.


I have a small cheep Chinese clock on the Kitchen table, iit drifts 
about a minute a week slow.  I keep it becasue it has the date which is 
hard to see on my MAIN kitchen clock, mounted on the wall, which takes 
orders from a US government transmitter in Colorado.


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Re: [neonixie-l] Re: NixiChron upgrade, new firmware, NixiChron style case...

2016-10-06 Thread Charles MacDonald

On 16-10-06 04:01 PM, David Forbes wrote:

Come to think of it, Jeff also lived in Arizona. Perhaps that's why he
didn't understand the subtleties of DST programming, since he never used
it!


DST is also an Ongoing problem, I keep getting new versions of "tzdata" 
on my computer a couple of times a year


More info at
https://www.iana.org/time-zones


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Re: [neonixie-l] How hot should a mosfet get?

2016-09-28 Thread Charles MacDonald

On 16-09-28 02:00 PM, gregebert wrote:

My bad...just checked the IRFD220 datasheet and it's not easily
heat-sinked. I blindly assumed it was a TO-220 or similar case.


looks like they expected the designer to use the side with the double 
pins to be heat sinked by the PC board.  Might be able to attach a sink 
on the top of the chip...  But yes a TO-220 is much easier to play with.


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Re: [neonixie-l] I agree with the Rant - eBay Sucks ! Shipping Calculator

2016-09-19 Thread Charles MacDonald

On 16-09-19 07:03 PM, alb.001 alb.001 wrote:

I sold some cables recently and it clearly stated shipping to USA lower
48 states was $20.  The buyer showed me the invoice he got from eBay and
it indicated "shipping free".


E-bay has wonted to become more like a store and less like an auction 
site.  The one that gets me is the "Global Shipping program."  a US 
seller lists an item and if the software recognizes it, it shows up on 
e-bay canada with global shipping.  this starts at about 20 dollars.  if 
I win, ebay tells the seller to ship to Pitney Bowes in Kentucky.  (I 
get to pay them for US shipping for that) There they cut open the 
package to verify that it looks like the listing (hopefully not damaging 
the item too badly)  and forward it on, with the opening taped up and a 
big E-bay Sticker added... Small Items under 20 dollars are just put 
back in the USPS mail, (but of course I have already paid twice once to 
get it to KY and again to mail it to Canada, so I have paid more than if 
the seller just shipped it direct)


If over 20 bucks they ship it to Toronto where they mail it, but I get 
to pay the retail sales tax at 13% just like I got it from the local 
store.  rest assured that Pitney gets a good cut.  there are some items 
where they can save me money, but on small items it just adds expense.


and latly I get Brethless e-mails with important news when the item 
arrived in KY, is shipped and when the post office delivers it.  All 
Don’t have the name of the item in the subject so I have to read them 
though to find out what they are about and can't search them alter if I 
am missing an item.



 I hate their shipping calculator. The system should just
wait for an invoice from seller who can properly figure postage to
wherever the buyer is.


As I buyer, I have had situations in the old days where I thought I had 
a good idea of what it would cost to ship somthing and had sticker shock 
when the seller used a gigantic oversize carton, or sent with the most 
expensive service because it was crossing big water (lake Ontario)..


(also got stung a few times where they declared a high value "in case it 
got damaged in shipping so I could make a good claim"  (unless perfectly 
packed as long as the box and or its contents get to you their is no 
claim, and did I metion the 13% sales tax --- On the declared value)


I would love to have a choice in shipping.

The other thing is that the seller now has to used "tracked" shipping to 
avoid a claim of Non delivery.  so many things that should be Small 
packet are instead sent Priority at 4 times the cost.  I don't know how 
many items I have "watched" for a week, and decided not to bid as the 
bid plus shipping would be more than the item was worth (to me) even 
though the bid itself was reasonable.




Also postage in Canada and USA is wa too expensive compared to
overseas- shipping from China costs seller practically nothing
(price + shipping = $0.99  - how do they do that?  simple, the buyers
country subsidized the shipping.


You have to wonder why the China Post can get away with such low prices, 
I just wish USPS and Canada post had simalar ones, then I could bid on 
more ebay items.  Mind you the China Post service really does seem like 
a slowboat from China as 30 days is typical.


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Re: [neonixie-l] PSU question...

2016-09-18 Thread Charles MacDonald

On 16-09-18 03:25 PM, David Forbes wrote:

Nick,

The mark that indicates that the input and output are fully isolated
from each other is a square within another square, called "double
insulated". If you don't see that mark, and you see a UL or ETL mark,
then it's reasonable to assume that the barrel is grounded, because
otherwise the unit wouldn't pass UL or ETL testing.


Assuming of course that the input has a ground pin.  if it is a two 
prong plug it would be reckless to pass along one side of the line. 
Although I suppose that they might trust that the Neutral prong should 
be safe to pass on.




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Re: [neonixie-l] Very useful Burroughs application note/brochure #616

2016-08-05 Thread Charles MacDonald

On 16-08-05 08:51 AM, Nick wrote:

The enclosed Burroughs brochure #616


thanks, a lot of information is one place.

In skimming I noticed a reference to the "characteristic Blue" of the 
long life tubes.  I guess that confirms the blue spots and the inclusion 
of mercury that keeps coming up on the list.


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Re: [neonixie-l] Re: IN-18 Typical Failure Mechanism

2016-07-12 Thread Charles MacDonald

On 16-07-12 02:13 PM, Dalibor Farný wrote:

Hello,

if the tubes is faulty, there must be a cause. If any of the pins is
leaky, it is practically not repairable. To refill the tube, you need
to open it and weld a glass tube onto remaining of previous evacuation
pipe.


could someone very skilled take the "stack" out of a dead tube and use 
it as the "Guts" of a new tubes, or would the the cathodes end up poisoned?



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Re: [neonixie-l] 2AP1 CRT help

2016-05-22 Thread Charles MacDonald

On 16-05-21 09:53 PM, Instrument Resources of America wrote:

'Medlabs' was a typo on my part just now in that last message. I had
been sending to 'madlabs' all along with no luck, always rejected.  Sent
to jpeak...@madlabs.infoagain just now. Rejected again on the second
go round. Here is a partial copy of the message that I'm getting,   Ira

jpeak...@madlabs.info  (after RCPT TO): 554 BLK_SYS_15 IP Address 
(69.168.97.48) of the sender was found in DNSBL MailSpike-BL-W and was 
therefore refused.


Not wanting to stray this far off topic but that is saying that the 
destination e-mail server thinks that the sending mail server is on a 
spam blacklist.  69.168.97.48 is the sending IP adddress and it appears 
to be from an ISP in Buffalo NY called Synacor using a server called 
smtp.hughes.net


perhaps IRA has to get his Internet provider to get the address taken 
off the blacklist.


the blacklist seems to be run by http://mailspike.org/

there tools show :
Matches found for 69.168.97.48 (smtp.hughes.net)

Worst possible reputation
Worst possible reputation

I did submit a delist request to try to open that blacklist up FWIW.  so 
try again.  But if one of the ISP's other customers is sending spam it 
will close up quickly.








On 5/21/2016 4:22 PM, David Forbes wrote:

madlabs, not medlabs.


On 5/21/16 2:54 PM, Instrument Resources of America wrote:

I've tried twice now Johnathan to respond to you on this, and both times
the message comes back to me as being undeliverable. To; J PEAKALL@
MEDLABS.INFOIra.




On 5/21/2016 12:00 PM, Jonathan Peakall wrote:

Hi All,

A little OT, but there are some CRT folks on this list.

I am working on a Hallicrafters SP-44 Skyrider Panadapter. I have done
a recap/re-resistor job on it. The CRT display isn't quite right, the
baseline is uneven in width, about right on the left but too wide on
the right. If anyone has some insight as to what could be causing it,
I would be very appreciative.

PLEASE REPLY OFF LIST : jpeakall AT madlabs DOT info

Many thanks folks!

Jonathan








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Re: [neonixie-l] Re: My NixiChron is sick, what do I do?

2016-05-16 Thread Charles MacDonald



Of course, and they often also include the decoupling, etc. But are you saying 
that we're missing one page with just that one chip's vcc/gnd? :) (when the 
other ones are all included on the schematic?). Doesn't seem likely, does it?



perhaps the circuit was reworked and the CPU changed, resulting in a new 
diagram for that part of the circuit?


I have certainly viewed LOT of diagrams where the power buses were 
implied or the subject of a foot note.



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Re: [neonixie-l] Minutiae - 5870 tube lead diameters

2016-05-04 Thread Charles MacDonald

On 16-05-04 02:09 PM, David Forbes wrote:

I have handled a lot of 5870 tubes, making Nixie watches. About 4,000 so
far.

I have noticed that there are different diameters of lead wires on these
tubes. (The lead wires are cast into the glass header, and the cathodes
are spot-welded to them.)
The thickest leads are 0.40 mm diameter, while the typical ones are 0.35
or 0.38mm. I just encountered one today with 0.29mm leads.


quick look for a data sheet shows they are specified as 0.014 to 0.017 
Typical diameter.  that gives .35 to .43 in mm if I did the conversion 
right.



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Re: [neonixie-l] Re: Crowdfunding for vacuum tubes/nixie/neon/scientific glassblowing workshop

2016-04-08 Thread Charles MacDonald

On 16-04-08 04:05 AM, Nick wrote:

Hi Lukas,

I like the idea, but I've tried hot glass work, and it's really tricky
to do well
As you probably know, at least one other member is doing exactly this
type of work, Dalibor Farny - http://www.daliborfarny.com/ - and its
taken him years of hard graft to get to the stage he's at.


Apparently Mr. Farney is one of the folks pledging on this one.

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Re: [neonixie-l] Re: Why were dekatrons still manufactured as recently as 1992 ?

2016-03-18 Thread Charles MacDonald

On 16-03-18 03:12 PM, 'threeneurons' via neonixie-l wrote:


In "the West", most tube production, other than CRTs and microwave
magnatrons, ended ~1975.


Some receiving type tube production continued in the US for a while 
after that, but for Military use.  Other microwave tubes are/were also 
produced, even today satellites seem to use TWT transmitters.



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Re: [neonixie-l] Re: Strange Nixie Sources?

2016-03-02 Thread Charles MacDonald

On 16-03-02 04:31 AM, Jonathan F. wrote:


I don't had much luck about getting offers, but im keep looking, maybe i
will be in luck one da :)

I got a offer for a B-8091 Nixie tube from one of this comapnies. But
400$ for that tube, nope..sorry


the sites running the NATO = NSN number stuff are looking to sell parts 
to someone who really needs that specific part (including perhaps the 
inspection stamp) to maintain an expensive piece of kit - like an 
air-plane.  It they can find a part for X hundred bucks and it will pass 
inspection them the unit can live another day.


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Re: [neonixie-l] Small neon bulbs 50 for $5

2016-03-02 Thread Charles MacDonald

On 16-03-02 12:53 PM, John Rehwinkel wrote:


That's Yan,
  I'm so tempted to buy one of his Divergence Meters, but I built one of
my own and do I really need two?


but don't you need a "divergence reference" to keep up with the 
calibration requirments?  ;)



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Re: [neonixie-l] Re: Strange Nixie Sources?

2016-03-01 Thread Charles MacDonald

On 16-03-01 08:51 PM, A.J. Franzman wrote:

Interesting that in the page you linked, the item name is "electron
tube", but it's given in the site's "connectors" category.


Perhaps it is an offshoot of the Military parts scan business.  there is 
occasionaly some military equipment that needs a part repleced, but it 
is so old that the part no longer exists, but a search on the NATO or 
FSN number turns up suppliers who claim to have them.  the NATO numbers 
look like 5970-01-- where the first group indicates what tipe of 
supply it is, and the second group indicates which NATO member assigned 
the number, and the rst of the number is a particular product.  (note 
the numbers are assigned for any commodity that might be bought 
repeatedly, one place I worked at we had a specific NATO number we had 
to use to get a certain size cardboard box to use for dead file storage.



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Re: [neonixie-l] Newbie with a question on how to drive VFDs

2016-02-20 Thread Charles MacDonald

On 16-02-20 04:03 PM, ZY wrote:

Hello. I'm pretty new to nixies/vfds, and I have some questions on how
to drive a VFD tube before I pick some up on ebay:
? I've seen some circuits where they just
bias the filament voltage a bit higher with a diode or a resistor before
the ground. Does that work? Is this what the max6931 filament bias does?
As in I supply -7v to the IC,
4) Why do some circuits bias the filament at a negative voltage like -30v?



8) If I drive one segment more than the other segments, would it "wear
out"?
9) What contributes more to tube life? Less filament current, or lower
grid/anode voltages? Is it both?

10) What is the mechanism in which VFDs fail?


VFD displays are little triode Vacuum tubes. with some phosphor on the 
anodes which glow when their is electron current.  (*)


The anode needs to be typicaly 30V more positive than the 
Filament/Cathode.  SO you can make the cathode negative and keep the 
anode near ground or make the anode positive and have the cathode near 
ground.  Or even a mixture! as long as the DIFFERENCE is whatever the 
display is expecting - Ie 30V.


If their is a grid, it is generaly there to allow things like 
multiplexing.  The data sheet should show the range of voltage it is 
expecting.  It can be used to turn on or turn off the entire digit, or 
even one way of dimming the display.


the filament is the source of electrons so you generally want it to have 
an AC voltage at the rated voltage and current.  If it has DC and goes 
across a multi-digit display the DC levels between the filament and the 
grid will vary and so with the light output.


The Phosphor will gradually loose output over use, and that loss tends 
to be more pronounced during the first part of the Tubes life.  Not 
using a segment for a long time then lighting it up MAY result in the 
"fresh Segment" being brighter.


The other burn-out mechanism is the filament burning out like a light 
bulb, or losing emission over time.  In some cases leving the filament 
lit up but the tubes biased off may lead to cathode contamination, and 
reduced emission.


(*) some enterprising folks have made Phonograph pre-amplifiers using a 
VFD.  it is not a great triode, but the glow does change with the current.


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Re: [neonixie-l] Re: High current 1.5A x150V power supply design for 100 IN9s

2016-02-11 Thread Charles MacDonald
I think it was on this list that someone once mentioned finding a used 
ELECTROPHORESIS power supply for less than a general purpose one.  these 
tend to be in the right range but are surplus to chem or Bio labs rather 
then engineering departments.  May not have the current you want and 
they tend to have a timer which MOST let you ignore and run continuously.


YMMV, And all that jazz.



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Re: [neonixie-l] Microchip finally buys Atmel

2016-01-28 Thread Charles MacDonald

On 16-01-27 11:06 AM, NeonJohn wrote:



On 01/27/2016 09:22 AM, Nick wrote:

+1 on hating the PIC "architecture".

I was always an AVR man, then I discovered the MSP430 series... :)


Interesting.  I plugged MPS430 into mouser and what came up is a large
100 pin chip that is fairly expensive.  Are there smaller versions in
the series?  I guess I have a lot of reading to do.




I'm in a quandary.  In upcoming products, I need more power than the
AVRs can provide.  I feel like I should be on the ARM bandwagon but I
have no idea where to start.  This TI chip looks interesting but it
chaps me to have to pay for dev tools. Yeah, I know the GNU chain is
free but sometimes one just has to have a source code debugger.



At the Last Ottawa Linux Symposium, Jon Hall mentioned that he is now 
working for http://www.linaro.org/


They seem to be the folks that work on the tool chains and migration 
paterns for the Whole ARM line.  It is a but unusual as ARM designs the 
chips but licences the design to several other firms to make them, and 
the spread is between small chips for low power, and bigger ones that 
take on low level x86 style tasks.


I only remember the highlights of Jon's talk.


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Re: [neonixie-l] OT: Darkened NOS(?) RCA 6AH6 tubes?

2016-01-16 Thread Charles MacDonald

On 16-01-16 07:04 AM, 'marta_kson' via neonixie-l wrote:


They are RCA 6AH6 that appears on the market from several sources,
claiming they are NOS/NIB. Are there any possibilities the blackening on
the inside of the glass have been deposited as part of manufacture? On
one tube in particular there are clear lines visible in the black
material, as it has been rubbed off by the mica wafer when it was
inserted. If so, they was clearly dark from the factory.


a quite a few tubes had a carbon coating on the inside of the glass to 
control static and suppress the blue glow from the electron beams.


a 12BY7 which is a similar tubes generally has such a coating, so I 
would not be surprised to see it here.


--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca  Just Beyond the Fringe
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Re: [neonixie-l] FS: IV-4, IV-12, IV-17, IV-26

2015-12-10 Thread Charles MacDonald

On 15-12-10 06:08 AM, Vadim Selin wrote:

Sorry, but my English is poor :(
My questions only for Yuriy, his native language not English. If I want
to recieve some information from other people, I use English, but I am
ashamed for my English level


Google translate does work well for the others watching who are curious 
which is said in another language, BUT in spite of the fact that Yahoo 
likes all the comments to come to the main list, if anyone wants to talk 
to just one member in the olden days of the net they would use a direct 
e-mail..


I see the two individuals listed as  From: Vadim Selin 
  and From: Yuriy Ovchinnikov  
 So if you folks want to discuss something the rest of us would not be 
interested in, why send it to a hundred people.  ;)




--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca  Just Beyond the Fringe
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