Chip with simple program for Toy

[Cecil Moore]

Reg Edwards wrote:

"Cecil Moore" wrote
My G5RV has an SWR of less than 2:1
on all eight HF bands.

The SWR on your 380-ohm transmission line to the antenna is umpteen
times greater than that!

I'm not talking about SWR on the series section transformer,
Reg, I'm talking about on the 50 feet of RG-213. And it's
not "umpteen times", rather limited to about ten times.

Isn't it time you changed the name of your SWR meter?

Nope, for a G5RV with the nominal 70 feet of 50 ohm coax,
the SWR meter is indeed reading the SWR on the coax.
Remember, I'm not using a tuner. The coax from the G5RV
goes directly to the transceiver through the SWR meter.
I actually use my SWR meter to display the SWR.
--
73, Cecil http://www.qsl.net/w5dxp

 

[Travis Evans]

On Saturday 07 January 2006 13:45, Victor Roberts wrote:

On Sat, 07 Jan 2006 16:36:37 +0000, Palindr?me
sb382638@hotmail.com.invalid> wrote:

Victor Roberts wrote:
On Sat, 07 Jan 2006 12:06:45 +0000, Palindr?me
sb382638@hotmail.com.invalid> wrote:

I haven't seen the original post (I'm posting from
sci.engr.lighting) but if there is no potential difference
between the posts then the power for the lamp is probably
carried by wires that are inside the hollow posts - which
seems to me the most reasonable way to design such lamps.

Yep, very reasonable.

The one in the OP's picture seems to have simple hinges at the top and
bottom which aren't big enough to take a wire through, IMHO.

I actually have many of what I think is this particular lamp. I use
them as work-bench lights. You can actually see through the case to
see the wires in the base terminate at crimp tags under the bolts of
the telescopic legs.

Of course there is another quick way to see - with a 12v lamp and a
couple of bits of wire..

Hasn't the OP already answer this, at least for his/her
lamp? The post says there is no potential difference between
the posts. I must assume this is with the lamp on, unless
the OP made a ridiculous measurement.

Or, the OP could have used a DC meter on an AC circuit, so
perhaps the question is not settled until the OP responds.

I had a lamp a few years ago that looked exactly like the one in the
picture the OP posted. I didn't actually measure across the posts, but
noticed that when I placed my finger in contact with both posts and
slid it up and down, I got a very slight vibrating sensation, and it
only occurred with the lamp plugged in and turned on. It was almost
unnoticeable, but I definitely wasn't imagining it. I wondered about
the safety myself.

--
Travis Evans
[The email address on this post is valid, but may change from time to
time. Make sure you use the latest email address; if you use an old
one, I will not receive your message.]

 

[Palindr☝me]

Travis Evans wrote:

On Saturday 07 January 2006 13:45, Victor Roberts wrote:


On Sat, 07 Jan 2006 16:36:37 +0000, Palindr?me
sb382638@hotmail.com.invalid> wrote:


Victor Roberts wrote:

On Sat, 07 Jan 2006 12:06:45 +0000, Palindr?me
sb382638@hotmail.com.invalid> wrote:

I haven't seen the original post (I'm posting from
sci.engr.lighting) but if there is no potential difference
between the posts then the power for the lamp is probably
carried by wires that are inside the hollow posts - which
seems to me the most reasonable way to design such lamps.


Yep, very reasonable.

The one in the OP's picture seems to have simple hinges at the top and
bottom which aren't big enough to take a wire through, IMHO.

I actually have many of what I think is this particular lamp. I use
them as work-bench lights. You can actually see through the case to
see the wires in the base terminate at crimp tags under the bolts of
the telescopic legs.

Of course there is another quick way to see - with a 12v lamp and a
couple of bits of wire..

Hasn't the OP already answer this, at least for his/her
lamp? The post says there is no potential difference between
the posts. I must assume this is with the lamp on, unless
the OP made a ridiculous measurement.

Or, the OP could have used a DC meter on an AC circuit, so
perhaps the question is not settled until the OP responds.


I had a lamp a few years ago that looked exactly like the one in the
picture the OP posted. I didn't actually measure across the posts, but
noticed that when I placed my finger in contact with both posts and
slid it up and down, I got a very slight vibrating sensation, and it
only occurred with the lamp plugged in and turned on. It was almost
unnoticeable, but I definitely wasn't imagining it. I wondered about
the safety myself.

Nope, I am sure that you weren't imagining it. However, the voltage is

far too low to present any significant risk to health. The amount and
the design of the insulation between anything carrying mains voltage and
the posts is good enough to make that an insignficant risk too - unless,
perhaps, you keep marine fish, swim with them and try to use the lamp as
a diver's lamp... Not a good idea to use these as a reading lamp in the
bath - but even then the risk of electrocution is low (and there should
not be any sockets to plug it in within a (UK) bathroom..

There is a risk of fire. Mostly from the halogen lamp. But also from
completing the crcuit between the posts with something resistive enought
to absorb power from the supply. Dropping some wire/gold loaded fabric
or ribbon across it whilst dressmaking is possibly a bad idea. Or some
wire-wool from the kitchen, either. If some bright spark gets this
brainwave about using magnesium fine wire in dress making ribbon, life
could get exciting.

So, if you want to use these lamps, no dress making in the bathroom,
with the bath full of salt water and your pet cod called Eric, and the
sink full of yesterday's pots and pans ok?

--
Sue

 

[Reg Edwards]

"Cecil Moore" <mycall@arrl.net> wrote in message
news:y8Hwf.15610$oW.13838@newssvr11.news.prodigy.com...

Reg Edwards wrote:
"Cecil Moore" wrote
My G5RV has an SWR of less than 2:1
on all eight HF bands.

The SWR on your 380-ohm transmission line to the antenna is
umpteen
times greater than that!

I'm not talking about SWR on the series section transformer,
Reg, I'm talking about on the 50 feet of RG-213. And it's
not "umpteen times", rather limited to about ten times.

Isn't it time you changed the name of your SWR meter?

Nope, for a G5RV with the nominal 70 feet of 50 ohm coax,
the SWR meter is indeed reading the SWR on the coax.
Remember, I'm not using a tuner. The coax from the G5RV
goes directly to the transceiver through the SWR meter.
I actually use my SWR meter to display the SWR.
--
73, Cecil http://www.qsl.net/w5dxp
=======================================

I see you are happy to change names when in a tight corner.

The name "Transmission line" has been conveniently changed to "Series
Section Transformer".

But it still has standing waves on it far higher than what you claim
for all bands. And don't standing waves increase loss on SST's just as
much as they do on transmission lines?

Louis is turning over in his grave - yet again.

But what the heck? A G5RV will work even if you havn't got one.

I once set up an 80 feet dipole without a series section transformer.
Unsurprisingly - it worked. ;o)
----
Reg.

 

[Cecil Moore]

nm5k@wt.net wrote:

If you want the vurry
best 80m dipole, feed it with nuttin but coax.

Well, as a data point, Owen's transmission line loss
calculator says there's 0.362 dB loss in 100 ft. of
RG-213 feeding a 50 ohm antenna on 75m. The loss using
100 ft. of open-wire feedline feeding a 50 ohm antenna
on 75m is 0.169 dB, less than half the loss in the coax.
Even the Wireman #554 "450" ohm line is better than
the coax at 0.269 dB. Where are the losses in a Ladder-
Line fed system?
--
73, Cecil http://www.qsl.net/w5dxp

 

[James]

Oops, they may be hologen mr-16 bulbs.

Look at this link

http://www.unitedhalogenbulb.com/


--James--

 

[Anthony Fremont]

"Dave Oldridge" <doldridg@leavethisoutshaw.ca> wrote in message

I swear OH8OS used to MAKE his own band openings or 15 back in 65 when
I
used to work him from VE8ML. He had a huge quad, 15 elements, I
think,
pointed right in my direction.

You just about can. Even with just two elements on 10, I worked several
contacts from Houston that couldn't hear anyone else in the US. I
really loved that antenna.

 

[Rich Grise]

On Wed, 11 Jan 2006 00:02:25 +0800, William A. Bong wrote:

I think that it was John Fields that posted a circuit using a voltage
regulator IC such as the 7812 as a current limiting device - John or anyone
else that could help out with this please repost it - I searched but it's
obviously no longer on my server.

I was thinking of using this as a current limiter to build a USB to Nokia
phone charger - I have
the hardware and connected it up straight, but it trips the power to my
notebook USB port requiring a reboot to reset the USB.

All advice and most welcome.

Bill.

A current limited regulator isn't what you're looking for here - all that
will do is make the power supply to your device droop, and it won't
operate properly. You need either a USB with a beefier supply, or an
auxiliary power supply, like a wall wart.

Good Luck!
Rich

 

[kell]

William A. Bong wrote:

I think that it was John Fields that posted a circuit using a voltage
regulator IC such as the 7812 as a current limiting device - John or anyone
else that could help out with this please repost it - I searched but it's
obviously no longer on my server.

I was thinking of using this as a current limiter to build a USB to Nokia
phone charger - I have
the hardware and connected it up straight, but it trips the power to my
notebook USB port requiring a reboot to reset the USB.

All advice and most welcome.

Bill.
Are you connecting your Nokia phone directly to the USB? It's actually

not such a bad idea, in principle -- the USB is a 5 volt power supply,
and you can charge a Nokia cell phone from a 5 volt power supply. But
if your Nokia is like mine, it doesn't draw a steady low current when
charging. Mine draws its power in pulses. And I'm sure these pulses
would be enough to trip a USB, which can only put out very small
currents.
Try putting a resistor in series with the USB and allowing a capacitor
to charge from the limited current coming through the resistor. Charge
your phone from the capacitor. Start with a few dozen ohms for the
resistor, and 1000 uF cap. With a correctly sized resistor, you may be
able to pevent the USB from tripping and yet still get the cap to
charge up between pulses. You should be able to make this work if the
total power drawn by your phone, over time, does not exceed the amount
of steady state power the USB can deliver. But there's no guarantee of
that.

 

[ah]

Peter Hucker wrote:

On Mon, 09 Jan 2006 00:37:52 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:
On Sun, 08 Jan 2006 14:05:05 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:
On Sun, 08 Jan 2006 00:53:58 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:

Only when I'm hot, or under duress.

Why?

With that amount of gas, you just might explode.

Happens all the time--I just learned to live with it.

http://80.229.155.158/videos/People/Ignited%20fart.avi

Do you encode this crap yourself?

Some of it.

I try to keep-up with all the new codicks, and stuff, but it seems everything
goes obsolete in a few months.

For the most part, I've ben happy with QuickTime, but it often says I need more
software . . . software which is currently unavaliable on the server.

Go figure.
--
ah

 

[Jasen Betts]

On 2006-01-10, William A. Bong <you.can.calll.me> wrote:

I think that it was John Fields that posted a circuit using a voltage
regulator IC such as the 7812 as a current limiting device - John or anyone
else that could help out with this please repost it - I searched but it's
obviously no longer on my server.

I was thinking of using this as a current limiter to build a USB to Nokia
phone charger - I have
the hardware and connected it up straight, but it trips the power to my
notebook USB port requiring a reboot to reset the USB.

use the regulator to regulate the voltage in a resistor.

usually works more economically with a 5V or lower regulator.
as the 5V etc is wasted

Bye.
Jasen

 

Where are the losses in a Ladder-
Line fed system? ....

The tuner that is usually used offsets the advantage
of the line itself. Sure, on paper you shouldn't really
be able to notice it. But I do when I test it. It's actually
measureable on an S meter when doing A/B comparisons.
Or at least it was for me when using a 989c tuner
and minimum inductance vs coax fed.
That tells me the tuner loss can often be a bit more
than it's cracked up to be. But I also found if you don't
use the minimum inductance when tuning the tuner,
you can lose quite a bit. I saw easy 20 % losses when
testing that one time. If I used the very least inductance,
I could get it down to an almost unmeasureable level.
If I get on 80m and want the very best efficiency I can get
feeding a dipole, I use coax.
Of course, the line is never more than 100 ft.
Usually more like 50 ft. I have a 50 ohm radio feeding a
low loss 50 ohm line, to a 50 ohm antenna feedpoint. You
have uncluttered perfection. And in the real world
the most efficient that I've seen so far. If there was better,
I'd be using it. I could see using the ladder line on real
long distances. On the higher bands, it could be noticable.
But like I say, my run is about 50 ft. Considering efficiency
vs ease of use, wx resistance, ease of lightning protection,
coax is a no brainer for me. Of course, I ain't everyone.. :/
MK

 

Tell me how to coax feed a dipole that works from 3.3 to 4.1 MHz and you
have my attention.

Probably wouldn't be practical for you.. Just offhand, I can think
of a way, but you'd have to run at least two set of dipoles, and
maybe even three, tied together in parallel. You would stagger
tune them one low, one middle, one high, and the SWR
plot should look about like a \/\/\/ . I've never tried using
three dipoles, but I've done it with two and having a W SWR
plot. That is one way you could have that range and use
coax feed. But like I say, probably would be a PIA with
it needing at least one center support and six tie off
points.
MK

 

[Jordan]

Your antique Harleys have excited-field alternators?
What's a diode string do?
Sorry no info that you want, but interesting to hear about your hobbies
merging.

Jordan

kellrobinson@billburg.com wrote:

Lately I got into
building voltage regulators for some of my fellow antique Harley
enthusiasts.

 

[Cecil Moore]

nm5k@wt.net wrote:

Where are the losses in a Ladder-
Line fed system? ....

The tuner that is usually used offsets the advantage
of the line itself.

Fred and I don't use a tuner.
--
73, Cecil http://www.qsl.net/w5dxp

 

[Peter Hucker]

On Wed, 11 Jan 2006 03:59:08 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:
On Mon, 09 Jan 2006 00:37:52 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:
On Sun, 08 Jan 2006 14:05:05 -0000, ah <splifingate@gmail.com> wrote:

Peter Hucker wrote:

Happens all the time--I just learned to live with it.

http://80.229.155.158/videos/People/Ignited%20fart.avi

Do you encode this crap yourself?

Some of it.

I try to keep-up with all the new codicks, and stuff, but it seems everything
goes obsolete in a few months.

I thought you said a month or two ago that you didn't/couldn't play ANY video.

For the most part, I've ben happy with QuickTime, but it often says I need more
software . . . software which is currently unavaliable on the server.

Go figure.

Windows Media player does the same. The only way round it I've found is to download codecs manually. I've collected 4 codec packs on my webpage, which seem to play everything: http://www.insanevideoclips.com


--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

For centuries, the English have had a love affair with all types of hunting. Early one morning, a fellow was blasting away at a clump of brush on a grouse hunt.
Suddenly an outraged gentleman appeared and said "See here old man, you almost shot my wife with that volley."
The hunter, properly shamed replied, "So sorry old chap. Here, have a go at mine, over there."

 

Fred and I don't use a tuner.

Then you and Fred aren't running the same G5RV that
most people buy and throw up. And then feed with a tuner. :/
That's why I say I'm not really talking about your antenna.
I know you will modify it to make it more usable. This is a
given. You are Cecil. But all those 1000's of users who don't
have the time or the clue to modify? Like Lurch would say
on the Addams Family...Gruggggghhhhhhhhhhhhhhh... :/
MK

 

[kell]

Jordan wrote:

Your antique Harleys have excited-field alternators?
What's a diode string do?
Sorry no info that you want, but interesting to hear about your hobbies
merging.

Jordan

The field is tied to the armature at the high end. Voltage regulator

conducts
field current to ground.
Diode string for a voltage reference with tempco that tracks the
battery's characteristic charging voltage.

 

[ah]

Rich Grise wrote:

On Sat, 07 Jan 2006 08:06:50 +0000, ah wrote:

Rich Grise wrote:
On Wed, 14 Dec 2005 20:43:05 +0000, Peter Hucker wrote:
On Wed, 14 Dec 2005 17:31:31 -0000, ah <splifingate@gmail.com> wrote:
Peter Hucker wrote:
On Mon, 12 Dec 2005 08:53:31 -0000, ah <splifingate@gmail.com> wrote:
Peter Hucker wrote:
On Sat, 10 Dec 2005 21:38:01 -0000, Rich The Newsgroup Wacko <wacko@example.com> wrote:

Visualize Whirled Peas!

I'll need some marajuana first.

You'll need a slight bit more'n that, Peter.

"Some" is not a specific quantity.

But easily identifiable--in this context--as not nearly enough.

"Some marajuana" is never anywhere near specific.

"Dope will get you through times of no money better than money will get
you through times of no dope."
-- Fabulous Furry Freak Brothers

"Dope will get you through times of no pussy better than money will."
-- some cow-orker in the EMR shop at Beale AFB, CA, ca. 1974

Cheers!
Rich

[1] EMR = Electromagnetic Reconnaissance. Or, depending whom you're
talking to, Educable Mentally Retarded. ;-P

IAWTP.

WTF IAWTP? "I Am Wet Toilet Paper?"

I Am With The Police.
--
ah

 

[Peter Hucker]

On Fri, 13 Jan 2006 11:31:36 -0000, ah <splifingate@gmail.com> wrote:

Rich Grise wrote:
On Sat, 07 Jan 2006 08:06:50 +0000, ah wrote:

Rich Grise wrote:
On Wed, 14 Dec 2005 20:43:05 +0000, Peter Hucker wrote:
On Wed, 14 Dec 2005 17:31:31 -0000, ah <splifingate@gmail.com> wrote:

"Some marajuana" is never anywhere near specific.

"Dope will get you through times of no money better than money will get
you through times of no dope."
-- Fabulous Furry Freak Brothers

"Dope will get you through times of no pussy better than money will."
-- some cow-orker in the EMR shop at Beale AFB, CA, ca. 1974

Cheers!
Rich

[1] EMR = Electromagnetic Reconnaissance. Or, depending whom you're
talking to, Educable Mentally Retarded. ;-P

IAWTP.

WTF IAWTP? "I Am Wet Toilet Paper?"

I Am With The Police.

Your spelling sux. Try this site: http://dictionary.reference.com/search?q=pig

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

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