MessageView 421F schematic

570 is pretty high resolution, most of the one's I'v eused in the past
were in the range of 320 to 440 lines and produced fairly good images.
(consider that minidv camcorders are usually in the 500-550 range on
the recorder.)
As for output. Gigahz the higher the better and the highest wattage
you can get.
I just purchased an elcheapo wireless off of ebay(50 bucks.) that was
just 200mw at 900mghz.
The resolution is 440 lines and is sensitive in the low infrared as
well.
It does manage to transmit a fairly clear signal through a brick wall
at about 90 ft. But that's just about as far as it'll go without snow.
The color is fairly good considering it's 1/3 inch ccd.
I'll be tweaking it up a bit to see if I can get a bit more range out
of it, but considering the price It's limitations are bearable.
I plan to use it strickley for security, you sound as if you want
something in the broadcast quality range.
What are your bugetary limits? I could scout around the web at various
companies I do business with and see if they have what you need.
P.S. stay away from X10, it's rinky dink junk that defective out of
the box about half the time. The specs are overblown to the point of
actually falsehoods as well.
On 12 Jul 2003 04:48:28 -0700, seymoria_at_yahoo.com (amer) wrote:

Hello,

I want to record a telephone call, and also have the possibility to feed
the telephone from an own audio source through a connector, rather than
just speaking into the handset.

So, what I need is an adapter with a telephone handset connector in one
end, and two audio connectors (3,5 mm or whatever) in the other end -
one out (that I can connect to a recording device) and one in (that I
can feed with my audio signal).

I have seen a lot of adapters connecting to the telephone handset
connector giving an audio-out connector; but I need something where I
can also provide the signal that is sent to the phone (and to the person
I am talking to).

Thanks in advance.

Hi everybody! i want and need to know how works an electric engraver,
or to be more objetive, i need to know its internal system, what
generate de mechanical vibration... any answer or link with that topic
will be appreciated!
Here is a link with the device to you make an idea what device i'm
talking about
http://www.mytoolstore.com/dremel/misctols.html

Hi everybody! i want and need to know how works an electric engraver,
or to be more objetive, i need to know its internal system, what
generate de mechanical vibration...

Well, never had one apart, but it has got to be a slug of soft iron which
gets pulled into a magnetic circuit with a coil of wire wrapped around it.
The coil will be connected to the mains, and provide magnetic attraction at
twice mains frequency.

"Camilo Andres Gil Cardona" wrote ...
Hi everybody! i want and need to know how works an electric engraver,
or to be more objetive, i need to know its internal system, what
generate de mechanical vibration...

It is just a big, heavy-duty "buzzer".
The moving armature is connected to the shaft that holds the "engraving"
tip.
The line mains current directly moves it up and down.

On Sun, 27 Jul 2003 09:34:43 -0400, "ctsbillc" <nospamctsbillc_at_ieee.org
wrote:

Well, never had one apart, but it has got to be a slug of soft iron which
gets pulled into a magnetic circuit with a coil of wire wrapped around it.
The coil will be connected to the mains, and provide magnetic attraction at
twice mains frequency.

---
_Has_ to be?

Where do you live that has 3600Hz mains?

Jon Elson wrote:



Hello, all,

I have just picked up an ancient US Army Signal Corps dummy load,
model DA-64A/UP, made in about 1958 by Raytheon. It is a massive
unit, with 12 100 W resistors in it, and forced air cooling. It has
some massive coaxial connectors on it that are unfamiliar to me.
It is 50 Ohms, though. I was wondering if anyone had the specs on this,
with respect to average and peak RF power, and frequency range.

Thanks in advance,

Jon



Pictures? I'd like to see those connectors. They could be GR-874.



OK, you want pictures? Here they are :

On Mon, 28 Jul 2003 22:01:13 +0100, Mike Harrison <mike_at_whitewing.co.uk
wrote:

Just took apart my Metcal MX2 PSU out of curiosity, and found a little pushbutton switch inside,
which is operated by a small grubscrew in the side of the case - anyone know what it's for...?
I don't have the original manual so I don't know if there's any mention of it in there....

Metcal irons are RF driven. That may be an interlock switch.
Nope - it works with the switch in either position. It also doesn't appear to alter the action of

Just took apart my Metcal MX2 PSU out of curiosity, and found a
little pushbutton switch inside,
which is operated by a small grubscrew in the side of the case -
anyone know what it's for...?
I don't have the original manual so I don't know if there's any
mention of it in there....

Metcal irons are RF driven. That may be an interlock switch.
Nope - it works with the switch in either position. It also doesn't
appear to alter the action of
the trip function.

Just a guess, maybe if it's RF driven, it's to change the frequency to

My son accidentally erased my system disk 2/3. My current system is
5.50. If someone can send me corresponding disk image or later system
release disks, it would be nice.

thanx in advance.

Hooga (NOSPAMhooga_at_bigfoot.com)

Can't provide you with the solution requested but I have found that
such variations are much less of a problem with high quality external
amps and speakers. Some of what we object to with the louder signals
is the distortion imposed by those dinky TV amp/speakers,

Kal


On Thu, 31 Jul 2003 20:36:15 -0400, Vlad <Vlad_at_bla.Bla.com> wrote:

I am looking for a piece of equipment to regulate the audio level of
my audio output TV set.
Cable or satellite, they all have the same problem. We change channel
and the audio level varies some times more than 6 dB . The worse
offender is CNN ( a channel that I would preferred to be 6 dB lower)
Ideally it should be an assembly that included two amplifiers the
automatic gain control and two decent speakers. Ideally the units
should have a remote control (one more for the collection) to control
the power, the volume and some settings for the 'automatic gain
control}
Most TV sets today have little speakers most of the times on the side
of the set that decrease the intelligibility and provide poor
response.

Does this device exists or do I have to make one?

Vlad

I am looking for a piece of equipment to regulate the audio level of
my audio output TV set.
Cable or satellite, they all have the same problem. We change channel
and the audio level varies some times more than 6 dB . The worse
offender is CNN ( a channel that I would preferred to be 6 dB lower)
Ideally it should be an assembly that included two amplifiers the
automatic gain control and two decent speakers. Ideally the units
should have a remote control (one more for the collection) to control
the power, the volume and some settings for the 'automatic gain
control}
Most TV sets today have little speakers most of the times on the side
of the set that decrease the intelligibility and provide poor
response.

Does this device exists or do I have to make one?

Vlad

I am very interested to know how an electric nailer works.
Are portable cordless electric nailers available anywhere?

Andreas Nilsson wrote:

Hello,

I want to record a telephone call, and also have the possibility to feed
the telephone from an own audio source through a connector, rather than
just speaking into the handset.

So, what I need is an adapter with a telephone handset connector in one
end, and two audio connectors (3,5 mm or whatever) in the other end -
one out (that I can connect to a recording device) and one in (that I
can feed with my audio signal).

I have seen a lot of adapters connecting to the telephone handset
connector giving an audio-out connector; but I need something where I
can also provide the signal that is sent to the phone (and to the person
I am talking to).

Thanks in advance.

Since you speak about the handset, be advised that one used to put a
handset into a pair of muffs that was a part of a 110 baud or 300 baud
modem - it was a way of getting around the direct connection
restrictions that Ma Bell had at the time (1980s).
There was a speaker (or similar) on one end used to generate sound,
and a microphone on the other end to pickup sound.
So much time has elapsed since those daze, it would be a challenge to
find one of those old modems.
OTOH, many phones still have a transformer inside for "sidetone"
coupling of the two signals.
So one can use a coil pickup for listening to conversations; some
experimentation is in order to find the most sensitive position for
pickup.
It might be possible to use the same coil for transmitting signals to
the phone; i have not tried that.
These are the two possible ways to allow what you have in mind.
Just do not record conversations; there are some fairly stiff federal
regulations.....