splitting this up so that each
page appears on its own page rather than as a two-page image?
Thanks
Nick
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On Thursday, 3 May 2012 05:48:04 UTC+1, Nick wrote:
>
> This has been around for a good few years and has beem discussed here and
> on the old Yahoo group several times. It geat to watch (I like the music) -
> he's not just skilled, he's an artisan.
>
> Find his home
This has been around for a good few years and has beem discussed here and on
the old Yahoo group several times. It geat to watch (I like the music) - he's
not just skilled, he's an artisan.
Find his homepage and have a look at that - there' s loads more there...
Nick
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This is good - a scan would be very welcome - I have this book, but
have never read it!
In Weston, page 340, he suggests that 50% reduction of visible output
would constitute end-of-life (I added that to the Wikipedia page years
ago).
Nick
On Apr 25, 9:26 am, "JohnK" wrote:
> I
river
board with an AVR or somesuch and a VGA/DVI output + a serial/USB input to
make a "ticker" or similar (or dare I say it, a clock?)
Nick
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wItem&item=150794792397
Cheers
Nick
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Interesting - Have you seen this with NL840-class tubes?
Nick
On Monday, 9 April 2012 11:11:55 UTC+1, Nocrotec wrote:
>
> It's a well known problem with the 1916's.
> I have about 500 NIB, and most of them show that problem.
> Most need a high firing voltage (200
The CK1916 is equivalent to an NL841 and is indeed a nice tube - it has a
left hand DP - the NL840 differers only in having no DP.
This tubes should (probably) work fine - there is (probably) something else
wrong... Have you checked you've still got HT at about 180V?
Nick
On Monday, 9
zed at the casual
> attitude toward safety in them.
At least they're not wearing ties and have short hair...
Nick
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ng glyphs from the grid of a
NON-TESTCARD monoscope, i.e. an alphanumeric one. This is a much more
complex problem.
Nick
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he question "Why?" - if you are
using a uP, then the character generation is is slightly academic
(though you can use the sine/cosine route some have used).
So, to be a valid exercise it should be completely analogue, and then
preferably hollow-state.
However, if I ever get round to it (unli
es, though there are a few
YouTube videos about them, but not this model - monoscopes were widely
used for generating test cards for mono (black & white) TVs...
Nick
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On Mar 24, 8:12 am, Cobra007 wrote:
> What does that exactly do? It looks like it is something similar to a
> more modern character generator ROM. Is that right?
Similar sort of idea, but more flexible. Have a look at my post above
- there are photos, comments & datasheet in tha
anode with the shapes you
are interested on them - the output signal varies depending on where you
hit the mask. The generic tube is the CK1414 and the suffix specifies which
standard (or custom) mask is in it...
Nick
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On Friday, 16 March 2012 19:22:05 UTC, Imbanon wrote:
>
> Oh and I accidentaly reported your post as spam. Sorry about that!
> Dunno how that effects anything though..
>
It doesn't - the mods clean up behind you ;-)
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On Wednesday, 21 March 2012 18:17:44 UTC, Ron Schuster wrote:
>
> Check out the DesignSpark PCB program.
> http://www.designspark.com/theme/designspark-pcb
> <http://www.designspark.com/theme/designspark-pcb>
>
>
It's a version of Easy-PC from Number One System
-sort-of-way
Some of the chip manufacturers (e.e. TI) have good tutorial too, but they
are more advanced and tend to be focussed on specific areas (SMPS,
low-noise op-amps, ground planes etc.)
Nick
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"neoni
time,
springs receptacles weaken, dry joints can occur and the nixie itself can
become damaged (cathode mounts fail & cathodes/anode shorts).
It might well be worth fitting anti-vibration mounts internally to the
unit...
Nick
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If anyone has examples of either of these sockets for sale, could they drop
me a pm?
I know that the NIMO socket is a modified 12-pin compactron, but I want to
copy the anode connection layout.
Thanks
Nick
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Just lovely work as always.
Nick
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On Friday, March 9, 2012 5:13:07 PM UTC, Quixotic Nixotic wrote:
>
> They X-rayed a sample Nick,
>
> The Pi blog says regarding the delay: 'This is because of a hardware
> parts substitution that was made in the factory by accident: specifically,
> where we’d specifie
On Friday, March 9, 2012 3:02:07 PM UTC, nixiebunny wrote:
>
> On 3/9/12 6:53 AM, Nick wrote:
> > Its a very bad bit of quality control if this really happened as
> > stated... regrettably, the problem would only manifest itself with the
> > destruction of the RP...
&
On Friday, March 9, 2012 8:08:55 AM UTC, Quixotic Nixotic wrote:
>
> On 6 Mar 2012, at 05:06, Nick wrote:
>
> > Just been told that I probably won't get mine until May :
> > ( presumably from batch #2
>
> All 10,000 of the original batch of Raspberry Pis have been
lmost certainly) coated in Mercury...
Nick
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d
give the equivalent heating effect to the signal under inspection.
Nick
On Tuesday, March 6, 2012 2:16:45 PM UTC, GastonP wrote:
>
> Actually there is only a definition of RMS, not subject to
> "trueness" :)
>
> http://en.wikipedia.org/wiki/Root_mean_square
>
>
Just been told that I probably won't get mine until May :( presumably from
batch #2
Mind you, its not as though I'm short of other projects to finish ...
>
>
Nick
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To v
On Monday, March 5, 2012 8:46:42 AM UTC, Cobra007 wrote:
>
> Yes, you're right Nick, the Fluke is indeed AC coupled. I didn't
> expect that to be honest as it undermines the definition of "true RMS"
> but a simple battery test shows 0V RMS :-).
Its not a co
the
anode resistor - it'll be something like 20,000 ohms/volt). Otherwise you
will need a 'scope to measure the voltage pulses and do the calculations
from those.
Lot to be said for analogue MMs...
Nick
On Sunday, March 4, 2012 10:26:23 PM UTC, Imbanon wrote:
>
> Hi all!
>
>
John - Its not the display you should be looking at, its the "magic"
keyboard underneath!
Nick
On Friday, March 2, 2012 8:55:38 AM UTC, Quixotic Nixotic wrote:
>
> Is this picture reversed then? I never saw a starburst sloping to the
> left and the commas on the wrong side
On Thursday, March 1, 2012 10:18:00 AM UTC, marcin wrote:
>
> Here in Norway you can buy only fishing rods.
That's simply not true. I bought some wonderful jars of pickled herrings in
Oslo. And a dazzle-camouflage-patterned pullover...
Nick
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This thread has moved well away from technical content to personal
attacks - its now closed.
Move along to the next thread please!
On Feb 27, 9:11 pm, Cobra007 wrote:
> > Michel tries to shoot holes in the advice from David Forbes
> > to have a look at the SN75468 as an alternative for MPSA42's
On Feb 27, 11:21 am, Cobra007 wrote:
> In short,
>
> Take a look at Geert's clock here:http://www.dos4ever.com/geert/geert.html
>
> Now, I do not know Geert but it seems to me he knows quite well what
> he is doing. Check the HV power supply he uses for his clock and
> estimate what the DC voltage
On Feb 27, 10:42 am, Cobra007 wrote:
> I don't know how many clocks will run over 180V but I did read
> somewhere that some people just take the rectified mains power and use
> that to drive the nixies.
Nobody in their right mind has used rectified mains for nixies for a
long long time. There are
On Feb 25, 9:39 pm, Cobra007 wrote:
> Don't you think they might turn on?
No
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neo
the drop in
the nixies when on - think about it! There is no need at all to use
anything over 100V Vceo
Nick
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If you think you thought of or
did something first, just take a moment to reflect and enjoy...
Lighten up!
Nick
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n. If you think you thought of or
did something first, just take a moment to reflect and enjoy...
Lighten up!
Nick
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f building glyphs with segments of curves & lines was
used back in the 50s in tube graphics display drivers.
There are a few app notes out there on this - I know we've had this
discussion before years ago on the old Yahoo group...
Nick
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ad, GW was in Lisle Street), Bulls, Proops (TCR) or some-
such.
I was 9 or 10 at the time.
Nick
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On Feb 9, 4:02 pm, Nicholas Stock wrote:
> Nick, we used to do the same with the trainssmall pennies or pieces of
> granite from the sidings...fun times. As a practicing chemist, I understand
> the hazards with dealing with toxic substances, but some of this has got
> out of h
st of the conc acids, benzine,
Hg, the bottles of Na & K (under oil). No fun anymore.
I used to put pennies on the railway lines 'cos then the trains used
to flatten them in a wedge shape as they flew out the side & stuck in
the fence - they were like razors...
Nick
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I come from an strongly academic legal family (constitutional &
administrative), and have thus always avoided anything to do with the
courts. However, at a certain time in life, litigation becomes one of
the few remaining pleasures (Orson Welles).
Nick
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les of Nebraska, and Triode
Electronics, to name a few. Ebay had also been named a defendant, but
they successfully moved to get dropped from the case because they do
not manufacture vacuum tubes."
Nick
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USA by a lengthy, largely
manual, process. Nowadays, automated testers do a faster & better job
at half the price from a number of vendors. The kit that is for sale
may not have been used for many many years (if it works at all).
Caveat emptor!
Nick
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link to see it."
The follow up on TCA at
http://groups.yahoo.com/group/tubecollectorsassociation/message/29608
suggests that it is mostly junk. Maybe. Maybe not.
Nick
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On Feb 3, 10:56 am, Quixotic Nixotic wrote:
> On 3 Feb 2012, at 06:24, Nick wrote:
>
> > . I actually wrote
> > an article about Fourier analysis for ETI after they published a
> > design so bad and with such a poor and inaccurate description that it
> > should
radio) and other nice stuff.
My advice is to buy a couple of months of each, then decide.
Nick
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ating point arithmetic operations..."
Probably not fast enough for a clock... ;-)
Nick
(probably a touch excessive...)
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er topologies work far better in this application - have a look
at "flyback converters" - they use low voltage FETs with low Vgs and
which are physically small.
Nick
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and
a bit of phosphor bronze spring...
If you are happy playing with 1000V+ (albeit at a tiny current) and
have a 100 bucks to spare, buy one and have a play...
Nick
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I always wondered about using a bit of Uranium glass...
Nick
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neonixie-
Enough already!
Lets stick to the technical stuff and positive contributions. Only.
Moderators
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(ish) dekatrons to that project from my
collection - ones they didn't have and approached me for.
Never even got a "thank you"...
Nick
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many designs
that he's placed in the public domain - well worth the time just to
drift round it...
Nick
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Both the Kohl books are available for free as PDFs from the fabulous
resource at:
http://www.tubebooks.org/technical_books_online.htm
This is a "goldmine" site - one for the bookmark page - used it for
years.
Hope that helps!
Nick
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Both the Kohl books are available for free as PDFs from:
http://www.tubebooks.org/technical_books_online.htm#Vacuum Tube theory
& circuit design
Hope that helps!
Nick
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Jan has then at 38EUR ex tax which seems about right - the recent ones
on eBay went for about USD30 each.
Nice tubes.
Nick
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On Jan 21, 1:55 am, micha...@aol.com wrote:
> We have winners.
I won one, but I may not be able to collect as you have to sign a form
stating that you are resident of the USA (don't remember seeing that
on the original page) and I'm in the UK.
Nick
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I won one ;-) Got an email this morning...
Nick
On Jan 21, 1:55 am, micha...@aol.com wrote:
> We have winners.
>
> Was going to check out what other people are/were going to do should they
> win, but I can't find the posts.
>
> Anyone have a link to them?
>
> Michail
e. Further, they
can determine if the recording has been edited (and how) by looking
for discontinuities in the expected data.
How cool is that?
Nick
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very lonely!
> Does anyone have any plans for a Nixie tube-themed party?
No - perhaps people with Nixie Watches can post photos of them? I
still have my pre-production prototype with no serial number and a not-
very-well-fitting case !!
Nick
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t; parts.
There is a whole bunch of induction furnace/heater projects on 4hv.org
- a very very useful site for high voltage/current etc. type
activities from Tesla coils to railguns to furnaces, to radioactivity
to chemistry to all sorts of stuff...
Nick
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ort of switcher, so a bit more care and attention is
required, but the performance is unbeatable when you get it right.
Many folk want to step outside of the box - sometimes "just good
enough" is just not good enough!
Nick
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chematic of your PSU? The arrangement of the
potential divider round the FB pin looks odd too, but its difficult to
be sure from just the board layout.
Nick
On Jan 14, 12:14 am, marta_kson wrote:
> Your problem seems to be very common on the 1771. My experience is
> that the feedback input
On Jan 6, 7:35 pm, Adam Jacobs wrote:
> Of course, there is always the classic "fake chinese capacitors" pic:
>
> http://www.discovercircuits.com/dc-mag/Issue_4/Photos/FakeCapacitor1.jpg
probably fake photo - not even right capacitance, let alone voltage.
Too simple to det
On Dec 31, 6:55 am, Lucky wrote:
> So does no-one know where to get these spacers?
They generally come with each tube - I've never seen them sold
separately.
Nick
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ad is going nowhere - I don't believe
anyone here wants the forum to descend into a mud-slinging match - if
you have issues with suppliers, please deal with it off-forum.
Thanks
Nick (Moderator)
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On Dec 25, 11:04 am, jb-electronics
wrote:
> And a merry Christmas to you all, too!
>
> > 16 for lunch today. Oh what joy
>
> We are going to be 13, I hope that is not bad luck ;-)
There's a famous restaurant in London where if they have a reservation
for 13, they lay a 14th place and have a
ho! Ho! HO!
16 for lunch today. Oh what joy
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even see a
> small flash).
I've done this with a charged up low ESR capacitor - often as little
as 100mJ is enough to clear a short, but remembering that the energy
in a capacitor is 0.5xCxV^2, you can up the energy until you clear the
short of blow the tube up...
Nick
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O instead...
Have a look at the DS3234 family or MCP79410. Very good & cheap
devices.
Nick
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...or place the MSF/GPS receiver wherever you have a good signal/no
interference and relay the time/date by bluetooth or some other
appropriate means
Nick
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quietest HV PS design of any description?
Linear, i.e. a transformer.
Nick
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On Dec 11, 9:03 pm, Jeff Thomas wrote:
> On Dec 11, 12:43 pm, Nick wrote:
>
> > BTW. They are truly astonishing in the flesh. Quite unlike any other
> > tube... kind of odd, as they have a standard socket, but a huge
> > base...
>
> > Nick
>
> Nick, being
On Dec 11, 7:29 pm, "Frank Bemelman"
wrote:
> - Original Message -----
> From: "Nick"
> On Dec 11, 5:58 pm, Terry S wrote:
> > I had to throw a bid in -- just to say I tried. :-)
>
> EUR 1,283.00
>
> Anyone want to buy a matched set of
On Dec 12, 7:01 pm, "Hugermugger" wrote:
> Could someone advice the rules - can I or can't I share schematics and
> instructions that are copyrighted?
Its simple - absolutely no sharing whatsoever of copyright material
(unless you own the copyright) - this includes schematics, photos,
documentati
On Dec 11, 5:58 pm, Terry S wrote:
> I had to throw a bid in -- just to say I tried. :-)
EUR 1,283.00
Anyone want to buy a matched set of 6? Seriously?
I suspect a set of six is worth at least a 15% premium on the
individual prices... ;-)
Xmas has come early for that vendor...
N
On Dec 11, 5:05 pm, Nick wrote:
> likewise - I have rather of lot of MTX-90s = got them many years ago
> intending to build a trigger tube clock = YAPTHHY (Yet Another Project
> That Hasn't Happened Yet...)
Just checked - in 2005 they were USD 50 per 100 units, i.e. 50c each.
--
likewise - I have rather of lot of MTX-90s = got them many years ago
intending to build a trigger tube clock = YAPTHHY (Yet Another Project
That Hasn't Happened Yet...)
Nick
On Dec 11, 7:19 am, John Rehwinkel wrote:
> > Are there any pictures of the MTX90 or IN-6 floating a
In these tough times, it'll be interesting to see what it goes for -
http://www.ebay.co.uk/itm/380390636302
Nick
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Yup its basically a B12C compactron, but its the mechanics of the
spring clip I was after. I have some drawings that show roughly how it
was done, but I've never seen a real socket and was just interested!
Nick
On Dec 3, 10:41 pm, David Forbes wrote:
> On 12/3/11 11:45 AM, Ni
Subject says it all really - anyone got one I can borrow even?
Thanks
Mocl
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neonix
Has anyone here looked at the Dionics drivers -
http://www.dionics-usa.com/product_index_3.htm
Are they even available anywhere?
Nick
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displays and many
of those are still available - there are members here who are pin-ball
experts (you know who you are!)
Nick
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http://www.youtube.com/watch?v=WjBDfZZQz54&feature=related
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On Nov 30, 3:55 am, Nicholas Stock wrote:
> http://www.ebay.com/itm/Huge-Babcock-Four-Digit-Alphanumeric-Neon-Dis...
>
> Bit pricey, but looks nice...
>
> Nick
This looks very like an SP-462 - a sample of which I have in my
collection - Its size-for-size the same as 4 x ZM-1350
t;
> Do you still have some broken B-7971 tubes, Nick? They are interesting
> not only for the bases, I can probably have the metal used in this tube
> analysed by a mass spectrometer at our chemistry department at the
> university - it might be interesting.
Sorry - they had to be ret
his means use two or three in series - this is
simply a limitation of the DC ratings of the electrolytic capacitors
that are currently in the component database - the schematic is fine -
you can replace the two series caps with a single higher rated one if
you so wish. You can ask them to add some
ly good to have one of the cathodes (and
possibly the anode) analysed to get its alloy mix.
As Jens Boos and others are interested in making their own nixies, if
you have access to any of that analytical stuff still, (or if anyone
else has), lets see what this tube was actually made of...
Nick
--
Yo
Go on, tell us. What tube was it?
PS. Are you at LBNL? Just wondering...
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neonixie-
On a more serious note, I think you should look at the wonderful
design tools at http://www.poweresim.com/
Selecting flyback as the base design, 450V @ 0.05A output, it'll
generate a complete design with all component values & tolerances etc.
Great fun just to play with!
Nick
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You
Hey - you seem to be in Linköping - drove through there on the way to
Motala to do the Vätternrundan a few years ago. Nice area.
Nick
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I picked up an ISCO 495 a while back - up to 2000V @ 120mA - 200W.
Electrophoresis supplies are great general purpose bench HV PSUs...
Warning: Serious danger of DEATH
On Nov 22, 8:14 am, Jon wrote:
> On Nov 21, 10:52 pm, "MrNixie (UK)"
> wrote:
>
> > Jeepers, Buddy! 475V at 50mA? Did you chec
hing.
If you've never played with a 555 before (the world's most popular
IC), trying doing some simple stuff like flashing an LED at 1Hz (lots
of schematics out there for that) - boring maybe, but you'll learn an
awful lot...
Cheers
Nick
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On Nov 16, 4:05 am, Lucky wrote:
> Okay thought I had it until I saw this clip,...
Did you notice the small cat & the cheese?
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To
I used to have one of these years ago - can't find it now and it
doesn't appear in my inventory...
However, have a look at http://frank.pocnet.net/other/Burroughs/1061K.pdf
Nick
On Nov 14, 6:44 pm, "kosbo.com" wrote:
> Hi All,
>
> Has anybody played/made clock
The original thread for this subject has been removed - an action we
do not take lightly.
I would encourage people to settle these sorts of disputes outside of
neonixie-l and if its eBay-related, to follow the eBay & PayPal
dispute process rigorously.
General discussion along the lines of "what c
e an
aberration.
Have you successfully raised a complaint against him? Let me know by
PM and If not, I will remove this thread.
Nick
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armoury... its PWM modulatable (is that a legit word?)
via the EN pin as well... Even as a CW driver for the dreaded
NIMOs
Ho, hum...
Nick
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eff - I presume the D1862 are 2SD1862s - what are the characteristics
of the transformer on the HT side? Does the HT need to be regulated?
(you could take feedback from the cathode of D5)
Nice circuit anyway!
Nick
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