I'll run a search for them then.
I didnt really have much look here in the uk for a crystal oven, but I
did find a good webpage for a project oven, only simple maths and very
stable results.
I dont really have a desperate need for such a thing, its just an
interest, I've outgrown decoding time sign
On 1/25/12 9:28 AM, H. Carl Ott wrote:
On Tue, Jan 24, 2012 at 10:50 PM, David Forbes wrote:
On 1/24/12 3:45 AM, dr pepper wrote:
Oh es, thanks for the link John.
The problem with building a crystal oven is callibration, you need to
find out what temp the xtal needs to run at to produce exac
On Tue, Jan 24, 2012 at 10:50 PM, David Forbes wrote:
> On 1/24/12 3:45 AM, dr pepper wrote:
>>
>> Oh es, thanks for the link John.
>> The problem with building a crystal oven is callibration, you need to
>> find out what temp the xtal needs to run at to produce exactly the
>> right freq.
>>
>
>
On 1/24/12 3:45 AM, dr pepper wrote:
Oh es, thanks for the link John.
The problem with building a crystal oven is callibration, you need to
find out what temp the xtal needs to run at to produce exactly the
right freq.
You can buy them on ebay for not much money. For that matter, a used
rubi
Oh es, thanks for the link John.
The problem with building a crystal oven is callibration, you need to
find out what temp the xtal needs to run at to produce exactly the
right freq.
On Jan 24, 10:39 am, dr pepper wrote:
> So the number of cycles in a day has been abandoned, at least the info
> w
So the number of cycles in a day has been abandoned, at least the info
was correct.
The sites are cool that show you the load, not many of those gigawatts
are powering nixies.
I'm surprised forensics can analyse recordings for mains hum at all
these days, everything for the last 10 years has a swi
On Jan 23, 2:29 pm, mike wrote:
> thank you all
>
> is there an easy way to use Dekatrons to do it
>
> thanks
>
> mike
To do what ?
How about an AC line sync timebase using a 'dekatron pendulum' ? The
animated .GIF on this overview page:
http://threeneurons.wordpress.com/dekatron-stuf
thank you all
is there an easy way to use Dekatrons to do it
thanks
mike
On Jan 23, 7:23 am, John Rehwinkel wrote:
> > I'm interested in a OXCO if anyone knows a good design.
>
> I haven't tried rolling my own, but the concept is simple - pop your crystal
> into a small insulated e
> I'm interested in a OXCO if anyone knows a good design.
I haven't tried rolling my own, but the concept is simple - pop your crystal
into a small insulated enclosure with a heater and thermostat, this avoiding
temperature related variations.
I generally just buy ready made crystal ovens. The
I'm interested in a OXCO if anyone knows a good design.
Also thought about receiving radio 4 on long wave 198 kc and dividing
down to 1hz, they use a rhubidium oscillator to make the carrier, dont
know why, I'm sure someone here does.
On 20 Jan, 18:42, Nicholas Stock wrote:
> GPS is the way to g
GPS is the way to go...or a DS3231 or similar TCXO...
On Fri, Jan 20, 2012 at 10:28 AM, Joseph Bento wrote:
> You might have yet to find another location. See
>
> http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/
>
> We're about to dr
You might have yet to find another location. See
http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/
We're about to drop our regulation as well.
Joe, N6DGY
On Jan 20, 10:45 am, Nicholas Stock wrote:
> That's why I moved to the states.
That's why I moved to the states...;-) ha ha
On Fri, Jan 20, 2012 at 9:44 AM, wrote:
> **
> Got some recordings you are worried about? heh.
>
> In a message dated 1/20/2012 9:42:15 A.M. Pacific Standard Time,
> nickst...@gmail.com writes:
>
> That's cool, but also a little creepy;-)
>
> -
Got some recordings you are worried about? heh.
In a message dated 1/20/2012 9:42:15 A.M. Pacific Standard Time,
nickst...@gmail.com writes:
That's cool, but also a little creepy;-)
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That's cool, but also a little creepy;-)
On Fri, Jan 20, 2012 at 9:39 AM, Nick wrote:
> On Jan 20, 12:44 pm, Terry S wrote:
> > Here's an interesting related site:
> >
> > http://www.dynamicdemand.co.uk/grid.htm#
>
> Yes - I believe the UK has abandoned long-term 50Hz accuracy - the
> frequ
On Jan 20, 12:44 pm, Terry S wrote:
> Here's an interesting related site:
>
> http://www.dynamicdemand.co.uk/grid.htm#
Yes - I believe the UK has abandoned long-term 50Hz accuracy - the
frequency of the mains has to remain within strict limits, but that
variation within those limits is controlled
Here's an interesting related site:
http://www.dynamicdemand.co.uk/grid.htm#
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neon
Interesting.
Yes the grid frequency drops when the generating station is
overloaded, the gensets slow down and the output frequency depends on
ratational speed, theres an online gizmo for the uk that shows the
current frequency, it says at the lower end 'overloaded'.
This side of the pond you can g
Here is the modification for 50Hz:
http://www.tayloredge.com/storefront/1384_TIClock/1384_60-to-50Hz_Conversion.pdf
Note that there are some errors in the original schematic, cleaned up
schematic here: http://www.tayloredge.com/storefront/1384_TIClock/1384.pdf
jt
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> > have a Nixie clock based on that (uses mains frequency), and I can
> > tell you that it is not true at my outlets! The clock loses a few
> > minutes every day, which makes it more of a lamp then a clock.
>
> I suspect that's more a problem with the clock than the power frequency. To
> extr
> I have heard the same thing about the US grid having the exact number
> of cycles per day, due to legacy use of the frequency for clocks. I
> have a Nixie clock based on that (uses mains frequency), and I can
> tell you that it is not true at my outlets! The clock loses a few
> minutes every da
I have heard the same thing about the US grid having the exact number
of cycles per day, due to legacy use of the frequency for clocks. I
have a Nixie clock based on that (uses mains frequency), and I can
tell you that it is not true at my outlets! The clock loses a few
minutes every day, which m
My source for this isnt necessarily accurate, however they say the
mains freq is accurate in the uk over a 24 hour period from 9 am till
9 am, they speed up and slow down the gensets during the 24 hours and
at night time they control the speed to get the right amount of cycles
for the last 24 hours
>From the National Grid (Who supply/transmit our electricity) "System
frequency will therefore vary around the 50 Hz target and National
Grid has statutory obligations to maintain the frequency within +/-
0.5Hz around this level. However, National Grid normally operates
within more stringent 'opera
> I guess that the additional question would be: How stable is the mains
> frequency in the UK?
Its supposed to be stable and analogue clocks driven from the mains
were once the norm in public buildings. I would use it as a time base.
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I guess that the additional question would be: How stable is the mains
frequency in the UK? We use it in the US because it is very stable.. I
understand that in the former soviet union, the mains frequency was
terrible. Whenever I open up old soviet clocks they always have a
crystal in them (an
On 1/18/12 11:07 AM, dr pepper wrote:
Take care of clocks using the mains as a timebase like the ones
posted, they are for 60hz, ok in the us, but wouldnt be any good here
in the uk.
You just need to change the first 7492 frequency divider chip to a 7490,
then it will work at 50 Hz.
--
David
Take care of clocks using the mains as a timebase like the ones
posted, they are for 60hz, ok in the us, but wouldnt be any good here
in the uk.
If you go for a crystal timebase then make sure you get the right
crystal, they come in series and parallel flavours, parallel seems
more popular, some 'c
Or you could use my scan of the schematic David posted :)
http://www.selectric.org/nixie/ticlock.gif
> On 18 Jan, 03:47, mike wrote:
> > could you show me a simple schematic for it
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Heres a nice little circuit I found, you allready have the 141's in
your display modules, so you just need to build the lower part of the
circuit and graft it on.
The circuit has seconds display, you obviously dont have the tubes for
that, you could just construct the circuit and leave out the 141'
could you show me a simple schematic for it
thank you
mike
On Jan 17, 6:42 pm, John Rehwinkel wrote:
> >http://www.ebay.com/itm/190604819318?ssPageName=STRK:MEWAX:IT&_trksid...
>
> Should be easy enough to make a clock out of it. If you care to multiplex
> it, you'll need an
That would look cool in the dash of my Humvee :)
On 17 Jan, 20:55, Dennis wrote:
> I use one as a test bed for programming. Direct drive just hook it up. Now if
> I could just figure out how to program. :)
>
>
> From: mike
> To: neonixie-l
> Sent: Tuesday, Jan
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