audio recording on IC -help wanted

[Fred Abse]

On Fri, 08 Feb 2013 16:32:40 +0000, Ian Field wrote:

"Fred Abse" <excretatauris@invalid.invalid> wrote in message
newsan.2013.02.08.12.20.33.475919@invalid.invalid...
On Fri, 08 Feb 2013 08:55:32 +0200, Tauno Voipio wrote:

The scan system is resonated on the third harmonic to the line rate to
create the S-correction for the scan, slower on the edges and faster at
the middle.

That's yet another version of the widely-held misapprehension about
horizontal output harmonic tuning.

The *leakage inductance* of the flyback transformer is resonated at
either the third (monochrome), or fifth (color) harmonic of the "flyback
frequency", which is the reciprocal of twice the flyback time, somewhere
around 3, or 5 times 50kHz for NTSC/CCIR 525/625 line TV, assuming 10
microsecond flyback.) This has the effect of flattening the peaks of the
(half-sine) flyback pulses, and can be seen as either one or two small
dips in peak flyback voltage. In early tube designs, this was done with
a small winding underneath the HV winding, which was resonated with a
capacitor. In later designs with diode-split windings, it was done by
carefully controlling interwinding capacitance.

That sounds more like what I (vaguely) remember reading about all those
years ago.

S-correction is a separate issue, achievable with a suitable capacitor
in series with the actual scanning current.

That's what I remember - E/W modulation was done with a saturable reactor
in the days of delta-gun CRTs, they developed H/V summing chips for
pincushion control in the inline-gun CRTs.

Also diode modulators.

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

 

[Ian Field]

"Fred Abse" <excretatauris@invalid.invalid> wrote in message
newsan.2013.02.08.16.45.21.761532@invalid.invalid...

On Fri, 08 Feb 2013 16:32:40 +0000, Ian Field wrote:



"Fred Abse" <excretatauris@invalid.invalid> wrote in message
newsan.2013.02.08.12.20.33.475919@invalid.invalid...
On Fri, 08 Feb 2013 08:55:32 +0200, Tauno Voipio wrote:

The scan system is resonated on the third harmonic to the line rate to
create the S-correction for the scan, slower on the edges and faster at
the middle.

That's yet another version of the widely-held misapprehension about
horizontal output harmonic tuning.

The *leakage inductance* of the flyback transformer is resonated at
either the third (monochrome), or fifth (color) harmonic of the "flyback
frequency", which is the reciprocal of twice the flyback time, somewhere
around 3, or 5 times 50kHz for NTSC/CCIR 525/625 line TV, assuming 10
microsecond flyback.) This has the effect of flattening the peaks of the
(half-sine) flyback pulses, and can be seen as either one or two small
dips in peak flyback voltage. In early tube designs, this was done with
a small winding underneath the HV winding, which was resonated with a
capacitor. In later designs with diode-split windings, it was done by
carefully controlling interwinding capacitance.

That sounds more like what I (vaguely) remember reading about all those
years ago.

S-correction is a separate issue, achievable with a suitable capacitor
in series with the actual scanning current.

That's what I remember - E/W modulation was done with a saturable reactor
in the days of delta-gun CRTs, they developed H/V summing chips for
pincushion control in the inline-gun CRTs.

Also diode modulators.

Diode modulators didn't really catch on until the inline gun CRTs came
along.

I've seen a saturable reactor a little more recently in the B+ regulator of
an early multisync VGA monitor, the bias winding was driven by a TL431.

Without my early CTV experience I might've spent some time figuring out WTF
was going on.

 

[DaveC]

If you can hack in another divide-by-2 stage, Mouser and Digi-Key both
carry 17.734475 MHz crystals, which would give you 8.8672375 MHz.

If this crystal's only job is to provide a digital logic clock, Mouser
and Digi-Key also sell programmable crystal oscillators for around $7
to $10. You tell them what frequency you want and they program it for
you before shipping. They come in little cans about the size of an
8-pin or 16-pin DIP IC; you supply power (usually 3.3 V or 5 V) and
ground and square waves come out.

Matt Roberds

Thanks Matt.

I don't have space for 16 pin DIP or such. This is old equipment being
repaired. Failed crystal. It clocks the video data on a PAL video board (not
PC type -- proprietary).

 

[Phil Hobbs]

On 2/11/2013 7:46 PM, mroberds@att.net wrote:

Followups set to sci.electronics.components .

In sci.electronics.components DaveC <invalid@invalid.net> wrote:
I need a 2-pin crystal, 8.86723 (PAL video standard).

Where do you get these now?

If you can hack in another divide-by-2 stage, Mouser and Digi-Key both
carry 17.734475 MHz crystals, which would give you 8.8672375 MHz.

If this crystal's only job is to provide a digital logic clock, Mouser
and Digi-Key also sell programmable crystal oscillators for around $7
to $10. You tell them what frequency you want and they program it for
you before shipping. They come in little cans about the size of an
8-pin or 16-pin DIP IC; you supply power (usually 3.3 V or 5 V) and
ground and square waves come out.

Matt Roberds

Those ones are PLLs internally, and so have _horrible_ phase noise
compared with a real crystal oscillator, even one of the crappy ones
made from gates.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510 USA
+1 845 480 2058

hobbs at electrooptical dot net
http://electrooptical.net

 

[Fred Abse]

On Mon, 11 Feb 2013 21:44:57 +0000, Ian Field wrote:

I've seen a saturable reactor a little more recently in the B+ regulator
of an early multisync VGA monitor, the bias winding was driven by a TL431.

Magnetic amplifiers are quite common in switch mode PSUs.

Hitachi/Metglas make a range of amorphous iron toroids specifically for
that purpose, as do Ferroxcube, in ferrite.

--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)

 

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

On 2/11/2013 7:46 PM, mroberds@att.net wrote:
Followups set to sci.electronics.components .

If this crystal's only job is to provide a digital logic clock,
Mouse and Digi-Key also sell programmable crystal oscillators for
around $7 to $10.

Those ones are PLLs internally, and so have _horrible_ phase noise
compared with a real crystal oscillator, even one of the crappy ones
made from gates.

I learned something today. I guess if you are clocking something
digital that doesn't have strict requirements on the clock, they are
OK. For the OP's application, where the output will eventually be
analog video, they might not work as well. I was just trying to come
up with a way to meet his stated and implied requirements (one-off
repair, desire to get parts from the US.)

Matt Roberds

 

[Ian Field]

<mroberds@att.net> wrote in message news:kfelu2$q1c$1@dont-email.me...

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
On 2/11/2013 7:46 PM, mroberds@att.net wrote:
Followups set to sci.electronics.components .

If this crystal's only job is to provide a digital logic clock,
Mouse and Digi-Key also sell programmable crystal oscillators for
around $7 to $10.

Those ones are PLLs internally, and so have _horrible_ phase noise
compared with a real crystal oscillator, even one of the crappy ones
made from gates.

I learned something today. I guess if you are clocking something
digital that doesn't have strict requirements on the clock, they are
OK. For the OP's application, where the output will eventually be
analog video, they might not work as well. I was just trying to come
up with a way to meet his stated and implied requirements (one-off
repair, desire to get parts from the US.)

I'd certainly investigate any discarded Philips TV - the ones with a big IC
for IF/decoder/timebase are usually dual or multi-standard.

A board I had laying about (not Philips) had 4.433 & 3.579 crystals side by
side - in the Philips ones (or using their chip) the crystal is usually
twice 4.433.

 

çŐâŇŕâĐÚ, 07. áŐßâŐÜŃĐŕ 2000. 21.07.37 UTC+2, Aleksandar Stojiljkovic řŐ ÝĐßŘáĐŢ/ŰĐ:

MIKRO PRINC ELECTRONIC
Kralja Milutina 31
11000 Beograd
tel/fax: 011-33-42-552
011-33-42-632
e-mail: arg@yubc.net
arg@bits.net
arg@arkayu.net
arg@eunet.yu
office@mikroprinc.co.yu
web: www.mikroprinc.co.yu

e-mail: office@mikroprinc.com

 

[Jon Elson]

Karl in Spokane wrote:

Ditto on most everything on this thread as I take shipping into account
(no pun) when budgiting for a project. Sure would like to know from the
person which state of his has no sales tax ?!
One nice thing about Mouser, when they have to back-order an item,

they ship those later at THEIR cost. Lately, there are more items
at Mouser that are cheaper than Digi-Key. Whenever I buy a lot
of some more-expensive part, I check Newark and Allied, also.
Sometimes their prices are 20% below the others. I've never really
been able to find the pattern of it, either, although I have tried
to see if I could. Digi-Key seems to have the fastest shipping to
me. Used to be, a decade ago, that if I ordered by phone in the morning,
I'd get the parts the NEXT day, via UPS ground. No more, seems to take 3-4
days from Thief River Falls, MN to St. Louis, MO. Mouser is 4-5 days
from Fort Worth. Don't use Allied or Newark enough to know the
delivery time as well. Avnet is REALLY slow, if you order online,
it takes a minimum of 2 weeks for the parts to come.

Jon

 

[Karl in Spokane]

Ditto on most everything on this thread as I take shipping into account (no pun) when budgiting for a project. Sure would like to know from the person which state of his has no sales tax ?!

 

[kilowatt]

On Monday, February 11, 2013 2:13:13 PM UTC-8, DaveC wrote:

I need a 2-pin crystal, 8.86723 (PAL video standard).



Where do you get these now? Seems nobody carries them, not even ham radio

shops. I'd visit a ham swap meet but I can't wait.



I can get them from Ireland...



http://www.donberg.co.uk/catalogue/passive_components/quartz_crystals/8.86723

8mhz.html



Any sources in the States?



Thanks.



(I'm in N. California.)

Hello

I have lots of 4.433MHz in a surface mt 2 pin minican \style. Would donate two or more if wanted. the freq is 1/2 of your desired freq. Made for PAL systems.

KW

 

On Monday, January 20, 1997 3:00:00 AM UTC-5, Ioannis Ioannou wrote:

Hi all,

I've been trying to input the 14536 into Electronics Workbench;
however, I can't find the spice model for this chip. Can somebody
point me to a database which contains it (and other CMOS)? Thanks for
the help.

John
--
Ioannis I Ioannou phone: (206)-543-1372
G-2 group, Atomic Physics fax: (206)-685-0635
Department of Physics
University of Washington e-mail: ioannou@phys.washington.edu

I have been looking for the PSpice model as well. If anyone has a model for this, you could help at least 2 people..

 

[Michael A. Terrell]

charliecmiles@gmail.com wrote:

On Monday, January 20, 1997 3:00:00 AM UTC-5, Ioannis Ioannou wrote:
Hi all,

I've been trying to input the 14536 into Electronics Workbench;
however, I can't find the spice model for this chip. Can somebody
point me to a database which contains it (and other CMOS)? Thanks for
the help.

I have been looking for the PSpice model as well. If anyone has a model for this, you could help at least 2 people..

Do you think that the OP has waited patiently for over 16 years for
an answer?


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.

 

[Michael Black]

On Mon, 5 Aug 2013, Michael A. Terrell wrote:

charliecmiles@gmail.com wrote:

On Monday, January 20, 1997 3:00:00 AM UTC-5, Ioannis Ioannou wrote:
Hi all,

I've been trying to input the 14536 into Electronics Workbench;
however, I can't find the spice model for this chip. Can somebody
point me to a database which contains it (and other CMOS)? Thanks for
the help.

I have been looking for the PSpice model as well. If anyone has a model for this, you could help at least 2 people..


Do you think that the OP has waited patiently for over 16 years for
an answer?

Is the IC still available? I seem to recall it being less common among

the hobby type IC dealers, reflecting less demand than the common gate
type ICs. And it was getting old in 1997, so 16.5 years later it may be
even more difficult to find.

Funny, I guess even in 1997, there was argument in the sci.electronics.*
hierarchy about at what point to shift to a microcontroller. I'd think at
this point, something odd like that would mean a shift to a
microcontroller.

Michael

 

[Daniel Mandic]

Franz Glaser wrote:

Am 13.07.2013 13:58, schrieb Ingrid-Franz Glaser:
Am 13.07.2013 11:25, schrieb Robin H:

"Mittelater + Hexen" - Einstieg in das neue Hexenzeitalter:

Es ist das immerwährende Spiel, der Z.B. Pharao/Kirche und seine
Vasallen gegen das Volk. Das Volk war in den letzten zweihundert
Jahren am gewinnen, nun hat sich das Blatt entscheidend gewendet.

Wir denken wir seien aufgeklärt, aber leider sind wir noch im
tiefsten *Mittelalter* und merken es nicht einmal. Die neuen
Hexen heissen heute Terroristen. Ab und zu wird der Popanz
mittels “False Flag Attacks”, siehe 9/11, aus der Kiste geholt
und 99% der Massen geben ihre hart erkämpften Rechte dem Pharao
freiwillig zurück.

Wenn wir in Europa die NSA-Überwachung zulassen, ist es für die
freie Menschheit vorbei und wir sehen uns alle in FEMA-Camps
wieder.


Das kommt von der unausrottbaren Bequemlichkeit der
Unmündigenmehrheit.

Sie wird allzu gern von den wenigen % der Anführertypen mit allen
"technisch verfügbaren Mitteln" und nochmehr mithilfe von
"Nützlichen Idioten"-Bütteln ausgenutzt.

ANHANG:

Ich war ziemlich unfair gegen die "Nützlichen Idioten"-Büttel. Was
einem von ihnen passiert, wenn er ausschert, das können alle gerade
beobachten.

Allerdings - soweit wäre es nicht gekommen ohne seine Kollegen seit
langer Zeit.


Es wäre ein Wunder, wenns anders gekommen wäre.


Wir haben bereits eine Zeit kurz vor dem Kesselexplodieren aber
keiner will es wahrhaben.


GL

auch zu radikal. aber genial (auch ihr selbst-geqoutetes davor), lieber
Herr Glaser


--
Daniel Mandic

 

On Wednesday, April 21, 1999 12:30:00 PM UTC+5:30, Miha Zavrsnik wrote:

Hi,

we are looking for a photo detector which is origibnaly used for the
optical pickup of CD players. We need the chip for some special sensing
applications!
The detector chip should include multiple photo detectors and preferably

an I-V amplifier.
We have a data sheet of the SONY CXA1753M which is perfect, but have
been unable to find any reseler of the chip.

Thanks

Laboratory for Electro-Optics and Sensor Systems
miha.zavrsnik@uni-mb.si

hi
optical pick offece in rajkot office
give me address

 

[Michael Lalonde]

x-no-archive: yes

Lesmith Crystals in Canada is where I got some old crystals for a scanner
(hand me down toy for the kids)
(905) 844-4505

Michael Lalonde - Sudbury, Ontario - M&J Mining


"kilowatt" wrote in message
news:c2a56d81-66f7-4b3d-88b1-9c7c8dce67cf@googlegroups.com...

On Monday, February 11, 2013 2:13:13 PM UTC-8, DaveC wrote:

I need a 2-pin crystal, 8.86723 (PAL video standard).



Where do you get these now? Seems nobody carries them, not even ham radio

shops. I'd visit a ham swap meet but I can't wait.



I can get them from Ireland...



http://www.donberg.co.uk/catalogue/passive_components/quartz_crystals/8.86723

8mhz.html



Any sources in the States?



Thanks.



(I'm in N. California.)

Hello

I have lots of 4.433MHz in a surface mt 2 pin minican \style. Would donate
two or more if wanted. the freq is 1/2 of your desired freq. Made for PAL
systems.

KW

 

在 2001年8月29日星期三UTC+8上午6时27分59秒，bill cross写道：

I need a d/c timer-relay circuit with a time capability of at least
200 hours. Does anyone have any ideas where i could buy one?

http://www.timer-relay.com/
http://www.timer-switch.com/
http://www.relay.com.cn/
http://www.prc-oem.com/
http://www.aaaaauuu.com/
http://www.anyabb.com/
http://www.anyabb.cn/
http://www.kefuyang.cn/
http://cn.timer-switch.com/
http://de.timer-switch.com/
http://es.timer-switch.com/
http://fr.timer-switch.com/
http://it.timer-switch.com/
http://ru.timer-switch.com/
http://pt.timer-switch.com/
http://br.timer-switch.com/
http://au.timer-switch.com/
http://ca.timer-switch.com/
http://uk.timer-switch.com/
http://za.timer-switch.com/
http://blog.timer-switch.com/
http://shopping.timer-switch.com/
http://blog.timer-relay.com/
http://shopping.timer-relay.com/

 

On Sunday, December 9, 2001 1:10:04 PM UTC-5, Watson A.Name wrote:

Paddy wrote:

Hi Group,
I believe the NSN #s are in the xxxx-xx-xxx-xxxx format. Is there a
web site available where in if you plug in the NSN #s, you can find
the original Mfr P/N?

Cheers,
Paddy

About the only thing I've found that's of any help (electronics wise)
is this URL: http://www.oso3.nws.noaa.gov/ehbs/ehb1miscsec.pdf

Since a NSN indicates a generic part like a resistor for example, I
don't see how it could indicate the original mfr unless it gave the
(many) contracts that these generic parts were originally (and
subsequently) purchased under. Like Allen-Bradley, Ohmite, etc.,
etc., etc.

What cracks me up is that they even have an ECG part # in there!

You can look up national stock numbers at http://www.nsncenter.com

 

在 1997年5月25日星期日UTC+8下午3时00分00秒，Avi Raveh写道：

Dear sir !

My name is Avi Raveh and I'm Sales Manager in Schnider Elec. Eng. L.T.D.
I'm looking for :

Inductive proximity switch.
Diameter of 18 mm tubular.
flash or/and non flash.
N.O/N.C.
Power : 20-240 V AC/DC.
LED.

I need price for 100 pcs and delivery time.

Thanks for your response.

--

Avi Raveh email: talr@mail.iol.co.il
Sales Manager phone: 972-6-6594996
Schnider Elec. Eng. L.T.D. fax : 972-6-6597235

Timer Switch,24 hour timer switch,7 day timer switch http://www.timer-switch.com
proximity sensor, photo sensor http://www.timer-switch.com/sensor-e/

http://www.timer-relay.com/
http://www.timer-switch.com/
http://www.relay.com.cn/
http://www.prc-oem.com/
http://www.global-oem.com
http://www.aaaaauuu.com/
http://www.anyabb.com/
http://www.anyabb.cn/
http://www.kefuyang.cn/
http://cn.timer-switch.com/
http://de.timer-switch.com/
http://es.timer-switch.com/
http://fr.timer-switch.com/
http://it.timer-switch.com/
http://ru.timer-switch.com/
http://pt.timer-switch.com/
http://br.timer-switch.com/
http://au.timer-switch.com/
http://ca.timer-switch.com/
http://uk.timer-switch.com/
http://za.timer-switch.com/
http://blog.timer-switch.com/
http://shopping.timer-switch.com/
http://blog.timer-relay.com/
http://shopping.timer-relay.com/