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B&K E-200D signal generator - no signal
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Fred Bloggs
electronics forum Guru


Joined: 25 Mar 2005
Posts: 2468

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Sony CCD-FX620 microphone too sensitive. Reply with quote

"Mike" <mjb@posie.local.dom> wrote in message
news:cr8v0b$r4h$1@posie.local.dom...
Quote:
In article <20041227002021.21518.00002289@mb-m11.aol.com>,
David Farber <farberbear@aol.com> wrote:
a sensitive stethoscope. Each left and right mic contains two small mics
that
face each other.

The shield stuff is probably just foam to keep wind and dust out of the
mics. This won't make the mics more sensitive in the way you describe --
it's absence will make wind noise more objectionable. Try and find a
suitable foam replacement. Codge something together from a standard foam
mic-protector if necessary.

If your mics really are *each* made of 2 small mics facing each other,
that
is, 4 mics total ... it sounds like they are being used to do noise
cancellation or directional control of the sound (like a wide-tele zoom
setting). The original positioning and wiring of the mics would be
important. It is possible to create cardiod/hyper cardiod patterns by
sticking 2 capsules back to back and then "mixing" the resultant signal.

[If you've ever seen studio mics with the omni/fig 8/cardiod switches,
that's
one way they achieve it]

Did you wire the new capsules in *exactly* the same, and are you sure? The
wiring of the old ones may have been counter-intuitive, and you've
accidentally wired the new ones "intuitively", if you get me.

Did you get them in the right physical locations?

There are two ways to install the mic pairs. That would be either facing
toward each other or facing away from each other. I installed them facing
away from each other because it made more sense to have them facing the wind
screen where the sound would presumably be entering.

Quote:

Have you mixed and matched old capsules and new, or replaced wholesale?

Have you still got the old capsules?

The picture at the link below shows the new capsules and they are identical
to the old capsules.
Quote:

Any details on how the mics are wired (series, parallel, their own
separate


Each pair has its own four pin plug. The pc board wiring connects the two
mics in parallel. The net result is that you have two left mic's, two right
mic's, and each left/right pair in parallel.

Quote:
inputs etc.) ?

Mike.
--
--------------------------------------+-----------------------------------
-
Mike Brown: mjb[at]pootle.demon.co.uk | http://www.pootle.demon.co.uk/

The new mic's come prewired with connectors that match the PC board
connectors. Each microphone pair is in a metal casing which itself is
encased in a rubber fitting. Here is a link to the picture.
http://www.pbase.com/image/39324113/original

Thanks for your reply.
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Franc Zabkar
electronics forum Guru


Joined: 01 May 2005
Posts: 616

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Best Data 56SX modem power supply voltage? Reply with quote

On Tue, 01 Feb 2005 16:32:52 -0600, James Jones <junebug@yahoo.com>
put finger to keyboard and composed:

Quote:
I have a Best Data "Smart One" 56SX V.90 external modem that I want to
give to a friend. However, I seem to have misplaced the "wall wart" and
there is no indication on the unit as to the voltage requirements. I
don't even know if it's AC or DC. Does anyone know what voltage this
thing needs?

You can tell if it requires AC if there is a bridge rectifier on the
P/S input (do not confuse this with any bridge rectifiers at the Line
and Phone sockets). The voltage requirement can be discerned from the
voltage ratings of the filter capacitors. If DC, then the polarity can
be determined by following circuit earth to the power socket. Typical
current ratings for external modems are 1A max.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
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Jamie
electronics forum Guru


Joined: 24 Mar 2005
Posts: 597

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Contactor on 3 phase motor query Reply with quote

N Cook wrote:

Quote:
What would the voltage usually be on the coil of the contactor for
a lathe using a 3 phase motor?. In UK so single phase is 240V ac


most likely 240V, i am from the US and we use 120 normally for the

coil which also matches our resident common voltage. we do also
use 220..240 coils in Foreighn machines that we have.
in the case of your lathe, normally we use manual contactors,
this means no coil is neeeded. i mite what to consider that .
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True american Zero
electronics forum beginner


Joined: 02 Feb 2005
Posts: 10

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: how do people get away with this? Reply with quote

Sorry guys, I've got no benefit in this story but it really works.

First of all, the CD has to be demagnetized. There's been an article
bout this in one of the "Elektor" books and I tought at first it was an
april fool's day. Then after, it appeared its true, somer magnetization
may influence the path of the laser beam.

That's for the CD topic.

Now, if you us this guy's machine, you must be absolutely sure that
you've got no DC in the signal path, otherways, it will never work or
even get worse.

Cheers
Georges
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Joe KiwiTech
electronics forum beginner


Joined: 24 Mar 2005
Posts: 5

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Akai AC-300 Audio Sys. won't power on from Stby. Reply with quote

Thanks for your info, repair is mostly economical, if you know what you are
doing.

Cheers.

"Jerry G." <jerryg50@hotmail.com> wrote in message
news:36bldhF4v7333U1@uni-berlin.de...
Quote:
This sounds like a failure in the power supply. From my experience, I have
had defective electrolytic caps in the supply cause what you are having.

These Akai systems can be serviced by Akai, they have not been easy to
have
service information or parts, when the warranty is over.

Considering the age of these, and their actual value, I would be looking
for
something new, and having a descent warranty with local warranty service.
As
for all of these low cost systems, after the warranty is finished, it is
time to get a new one. Parts and service support is really non existent.

--

Jerry G.
=====

"Joe KiwiTech" <cybertek@wave.co.nz> wrote in message
news:ctpvus$4fo$1@lust.ihug.co.nz...
Hi there, I have two of these Akai AC-300 audio systems, both have the
same fault. The unit is in standby mode, display is dimm as in sleep mode.
I have tested the power tact switch, and tried turning on with the remote,
but won't turn on. Have no manual, and Akai is no longer in NZ.
Please help with any info.
Much appreciated.

Joe.

--
Joe Lussy - centennial@wave.co.nz

Centennial Electronics.
Whitianga, New Zealand.



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Leonard Caillouet
electronics forum Guru


Joined: 24 Mar 2005
Posts: 400

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: how do people get away with this? Reply with quote

Don't for get to remove that magnetic clamp that holds the disk down.

Better shield that optical cable in a wrap of mu metal as well.

LMAO!

Leonard


"True american Zero" <True_American_Zero@mickeythecat.org> wrote in message
news:030220050058343394%True_American_Zero@mickeythecat.org...
Quote:
Sorry guys, I've got no benefit in this story but it really works.

First of all, the CD has to be demagnetized. There's been an article
bout this in one of the "Elektor" books and I tought at first it was an
april fool's day. Then after, it appeared its true, somer magnetization
may influence the path of the laser beam.

That's for the CD topic.

Now, if you us this guy's machine, you must be absolutely sure that
you've got no DC in the signal path, otherways, it will never work or
even get worse.

Cheers
Georges
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NSM
electronics forum Guru


Joined: 05 May 2005
Posts: 719

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Contactor on 3 phase motor query Reply with quote

"Jamie" <jamie_5_not_valid_after_5_Please@charter.net> wrote in message
news:XC9Md.21790$8g4.14967@fe06.lga...

Quote:
What would the voltage usually be on the coil of the contactor for
a lathe using a 3 phase motor?. In UK so single phase is 240V ac

most likely 240V, i am from the US and we use 120 normally for the
coil which also matches our resident common voltage. we do also
use 220..240 coils in Foreighn machines that we have.
in the case of your lathe, normally we use manual contactors,
this means no coil is neeeded. i mite what to consider that .

If you use 220/380 your coil would be 380. No-one runs a neutral to a
starter just to run the coil.
--
N
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Ken Weitzel
electronics forum Guru


Joined: 29 Apr 2005
Posts: 314

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: how do people get away with this? Reply with quote

True american Zero wrote:
Quote:
Sorry guys, I've got no benefit in this story but it really works.

First of all, the CD has to be demagnetized. There's been an article
bout this in one of the "Elektor" books and I tought at first it was an
april fool's day. Then after, it appeared its true, somer magnetization
may influence the path of the laser beam.

That's for the CD topic.

Now, if you us this guy's machine, you must be absolutely sure that
you've got no DC in the signal path, otherways, it will never work or
even get worse.

Cheers
Georges

Hi...

Don't miss my version, which will be up for sale on
ebay soon. Just have to complete the final test.

Mine will cost a little more, but will do far, far more.

Not only will it demagnetize CD drives, but it will ALSO
demagnetize all of your hard drives. AND it comes with
a free AC battery, which you may use in series with your
data line to elimated that dratted DC.

Don't miss out; supplies are limited.

Ken
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Jim Adney
electronics forum Guru Wannabe


Joined: 02 May 2005
Posts: 164

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: CRT Problem Reply with quote

On Wed, 02 Feb 2005 02:56:29 GMT "Jason" <someone@microsoft.com>
wrote:

Quote:
I have a Compaq MV900 monitor that has ceased to work. Earlier today, it
worked flawlessly, but this evening i hit the power button and NOTHING came
on the screen.

Start by making sure the VGA cable is still plugged in. ;-)

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
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Bill Jr
electronics forum beginner


Joined: 24 Mar 2005
Posts: 3

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: SD-P4565 . . . . . . . . . Reply with quote

Yeah, I understand....

Bill Jr


"JURB6006" <jurb6006@aol.com> wrote in message
news:20050202020319.13716.00000244@mb-m23.aol.com...
Quote:
Hi;

"Jeff,
Look for a 2SD1276A regulator for the Horizontal Deflection ­to be leaky.
"

Bill, I had to get your reply off of Google, that's why this is a new
post.
I'll have my NG access fixed soon and I won't have these problems.

The way I see it is that is only if the convergence is tapping a waveform
off
that stage, it may well be. Of course anything is possible.

I will look into it, and thanks again for your time and all your help.
I'll
find a way to reciprocate someday, I just hope it isn't 20 years from now
and I
gotta kill somebody or something (joking, err,,,,,yeh, joking).

JURB
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James Sweet
electronics forum Guru


Joined: 01 May 2005
Posts: 1386

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Where can I buy a single Fairchild KA5S Power Switch? Reply with quote

"Adam" <kinema@gmail.com> wrote in message
news:1107339384.133452.210340@f14g2000cwb.googlegroups.com...
Quote:
I was wondering if anyone could point me to a place a can pick up a
single Fairchild KA5S0965 Power Switch
(http://www.fairchildsemi.com/ds/KA/KA5S0965.pdf). Mouser stocks them
but they have a minimum order of 360 pieces and Digikey doesn't doesn't
carry them at all.

--adam


Do they offer it as an engineering sample?
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James Sweet
electronics forum Guru


Joined: 01 May 2005
Posts: 1386

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: LCD projector Reply with quote

"Chuck Chandler" <sixaxis@blacksburg.net> wrote in message
news:ctpqh5$esqe$1@news3.infoave.net...
Quote:


What are you using to ballast the new bulb? I'd be very hesitant to go
up
in
wattage, in that unlikely scenario that it catches fire, you're pretty
well
screwed.

I'm not sure what you mean, but both are video projector bulbs- they use
25KV to start an arc, then about 20-50 volts to maintain the arc. So of
course I am using the original ballast (100 watt) with the slightly higher
(120 watt) bulb. The ballast is specifically designed to limit current, or
you could say regulate current, so I am pretty sure it is only putting out
100 watts, although it might be generating a slightly different voltage to
do so, which is really a function of the electrode gap. Thus it might be
getting a little hotter, hence the extra fans. This LCD projection tv had
30,000 hours on it when I got it for $1.25, but it really does look great.
I
have no worry about it catching fire, but there could be a component
failure
in it's future.

Ah, I thought you were using something else as the post was originally about
tricking the projector into thinking the lamp had started.

Using a lower wattage lamp is safe, though often you'll get a nasty color
shift if you operate a metal halide out of spec but that depends on the
design of the lamp. Also, surprising as it may be, operating them under
wattage will usually drastically decrease lamp life because the electrodes
run too cool and sputter heavily as the arc restrikes between the
half-cycles. YMMV though, for what you have invested in it it's a worthwhile
experiment.
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lavinci
electronics forum beginner


Joined: 24 Mar 2005
Posts: 10

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Where can I buy a single Fairchild KA5S Power Switch? Reply with quote

contact me if interested
infoatlavincidotcom
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worldcitizen
electronics forum beginner


Joined: 22 Feb 2005
Posts: 25

PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Akai AC-300 Audio Sys. won't power on from Stby. Reply with quote

Joe KiwiTech wrote:
Quote:
Hi there, I have two of these Akai AC-300 audio systems, both have
the
same fault. The unit is in standby mode, display is dimm as in sleep
mode.
I have tested the power tact switch, and tried turning on with the
remote,
but won't turn on. Have no manual, and Akai is no longer in NZ.
Please help with any info.
Much appreciated.

Joe.

--
Joe Lussy - centennial@wave.co.nz

Centennial Electronics.
Whitianga, New Zealand.

See if your audio output section is blown. It may be in protection
mode because of DC voltage in the output area.
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Guest






PostPosted: Thu Mar 24, 2005 3:15 pm    Post subject: Re: Anyone got Schematic for JVC AV 27 820 color tv? Reply with quote

kip having a bad day? maybe you need a hug
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Google

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