PRC as a amplifier in GPS question.

[Ken Taylor]

"Russell Griffiths" <rg26ce1991@hotmail.com> wrote in message
news:13cdb672.0307270558.60cc0168@posting.google.com...

Greetings Group.
I have a need to install an AM radio in a business with
several nearby tv's that may cause interference.

I have tried a car radio with the aerial on the roof.
The station wanted is 927, this can be picked up
without much interference, but the signal is too weak.

Does anyone know of a circuit I can build to amplify
the signal?

I bought AP342 AM/FM booster from WES, but the packet
and AERPRO web site says it is only to amplify FM.

I have looked at the "MIRACLE" AM ANTENNA (E.A. 11/96),
Low cost booster for AM reception article (E.A. 08/94)
and Passive Loop Antenna For AM Radios (S.C. 06/89).

Is there any way to connect any of these direct to a car radio?

The business has a Amplifier/Tuner with a AM loop aerial
connected to AM terminals on the back, but there is far too
much interference to pick up any AM stations.

Can any of the above projects be connected directly to
these terminals without picking up interference from
the tv's?

Has anyone had any experience doing this?

Thanks,
Russell Griffiths,
Rochester Vic.

You could look here:
http://www.hard-core-dx.com/nordicdx/antenna/loop/amamp.html
but I'm not sure how you'd go with the interference part. I would have
thought that out at Rochie you'd be fairly okay. Try also a long-wire
antenna if you have room, with the orientation towards your source.
Otherwise do a search on +"am radio" +amplifier +circuit

Suck it and see, as they say.

Cheers.

Ken

 

[Mike Harding]

On 27 Jul 2003 06:58:16 -0700, rg26ce1991@hotmail.com (Russell
Griffiths) wrote:

Greetings Group.
I have a need to install an AM radio in a business with
several nearby tv's that may cause interference.

I have tried a car radio with the aerial on the roof.
The station wanted is 927, this can be picked up
without much interference, but the signal is too weak.

I haven't looked in detail yet but this antenna design
looks interesting and may do what you want?

http://www.greertech.com/hfloop/mymagloop.html

Mike Harding

 

[Phil Allison]

"Russell Griffiths" <rg26ce1991@hotmail.com> wrote in message
news:13cdb672.0307270558.60cc0168@posting.google.com...

Greetings Group.

I have a need to install an AM radio in a business with
several nearby tv's that may cause interference.

I have tried a car radio with the aerial on the roof.
The station wanted is 927, this can be picked up
without much interference, but the signal is too weak.

** You need a better car radio - and good old Aussie made one with a tuned
RF stage as made by Ferris.

However, long range AM reception **is** basically a hobby - not a
business.





........... Phil

 

[Rob]

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
news:bg1dvu$jfpef$1@ID-76636.news.uni-berlin.de...

"Eric" <someone@clear.net.nz> wrote in message
news:3f2432e8@clear.net.nz...
I must be going word blind?
were does the "donkey" come into my posting?

"Kick your ass".........

It obviously didn't get picked up ont he metal detectors.

Ken

Metal detectors on a movie set ?

 

[Cheers]

markevans@iinet.net.au (Mark Evans) wrote in
news:1611990e.0307262341.50cf8986@posting.google.com:

Hi John West,

Im interested in getting a handfull of second hand stepper motors. If
you still have a whole pile of old printers/spares for sale could you
email me with your location, time I can pick up , cost etc. I am in
Perth.

Thanks
Mark

Hi mark

if you still intrested , i have a huge pile too myself i am in Perth too
North of the river

Cheers......


-------------
Please reply to moussa(at)iinet(dot)net(dot)au

 

[Bushy]

"Adam Seychell" <MYFIRSTNAME_MYLASTENAME@au.com.y_a_h_o__o> wrote in message
news:3f2254bb$0$3863$afc38c87@news.optusnet.com.au...

Thanks for the pointers. The tank will only contain about 5
liters of water. Operating temperature is 55°C. The element
power is 1800W. This version of the tank is made from
galvanized sheet metal pop riveted together and sealed with
polyurethane sealant. At this stage its only a proof of
concept version of the tank. Sometime down the track I'll
probably get a plastic tank made since this will never corrode.

Make sure you allow for the expansion of the water as it heats! Especially
for the time the element goes wild and you start producing lots of steam!
Either some form of pressure relief valve, weak joint that blows under
pressure, riser pipe or a vent. You probably don't want to deal with high
pressure steam or your tank splitting and spraying hot water around.

You have given me ideas. One of those small instantaneous
heaters that go under the sink might do perfectly. Since the
tank water is continuously circulating through a pump and
1ľm partical filter system so it wouldn't be much more
effort to install some type of inline heater. I've seen many
junked hot water services but never a small electric
instantaneous inline heater.

Available new for about $85.00 from plumbing supply places. If you are
recirculating water with a pump, you may want to us the heating pumps
available for around $200.00 with three speeds and a screwdriver slot in the
end of the shaft so you can free them when they jam without pulling them
apart. Corrosion can also cause problems if you are using steel impellers.
At 55 degrees, you can use either plastic or brass with copper tubing or
better yet PEX (Cross Linked Poly) pipe which is what I'm putting in my slab
for my extension and connecting with a small pump (to my wood stove hot
water system) to provide heated floor for my garage. Will be great working
on the car in winter.........

Peter

Rheilly Phoull wrote:
As Bushy says this the commercial approach to it, I imagine it wouldn't
take
too much scrounging to recover such a unit. Commonly found in storage
and
instantaneous heaters discarded in the rubbish and cleanup programs.
Note
that these are used on copper tanks, yours being steel might take a
little
longer to trip it. I guess we need a bit more input on the type of tank
usage.
You most likely could also find a pressure switch in a discarded
instantaeneous unit as well, identified by the cluster of micro switches
if
on a three phase unit.

 

[Mike Harding]

On Wed, 30 Jul 2003 23:08:59 GMT, "Michael Hart"
<mixstat-donotspam@bigpond.net.au> wrote:

Can someone remind me what the logic high and low switching voltages are for
CMOS ICs running at 5Volts supply.

The IC in question is a 6821 Motorola PIA

IIRC the Motorola devices were NMOS, Hitachi and others
did some CMOS versions.

The normal thresholds for NMOS are 0V8 and below is
a zero and 2V4 and above is a one.

My Hitachi data sheet for the HD6321 (and A & B parts)
gives 0V8 for a zero and 2V2 for a one.

Anything in-between those voltages is undefined.

Mike Harding

 

[KLR]

On Thu, 31 Jul 2003 17:22:09 GMT, Louie <beavisnbutthead@softhome.net>
wrote:

hi anyone,

i have a small electronic component that i can't identify. it looks like
a typical 1n4001 diode, similar size and shape with axial leads, but
there's no marking on it except for a single yellow stripe at the
midpoint.

i got a switch mode power supply and it has about a dozen of these
things in the circuit.

what are they?

thanx, louie

I would put a meter across it. It may be anything - a capacitor -
small inductor or even a miniature fuse or jumper wire link.

a meter will soon tell.

 

[Louie]

I would put a meter across it. It may be anything - a capacitor -
small inductor or even a miniature fuse or jumper wire link.

a meter will soon tell.

well, all i have is a simple VOM. it aint a cap cause it measures a

steady 0 (or very close to 0) ohms. could be some kind of choke. i can
tell by thier positions that they are not fuses or jumpers. who knows?

louie

 

[Eric]

Does it look as if it is used to jump over a track,
example if there are not PCB tracks between the soldered end of this device,
then I would say it would be pointless adding in this device as a wire link.

also do you have a ESR meter, that would see if it is a inductor the
resistance reading would go up.



"Louie" <beavisnbutthead@softhome.net> wrote in message
news:3ceWa.31974$YN5.27780@sccrnsc01...
: > I would put a meter across it. It may be anything - a capacitor -
: > small inductor or even a miniature fuse or jumper wire link.
: >
: > a meter will soon tell.
: >
: well, all i have is a simple VOM. it aint a cap cause it measures a
: steady 0 (or very close to 0) ohms. could be some kind of choke. i can
: tell by thier positions that they are not fuses or jumpers. who knows?
:
: louie

 

[Rob Judd]

Louie,

Try reading it with a meter. If it's dead short both directions (as I
suspect it might be) then it's what they call a 0-ohm resistor. Used in
manufacuring to allow links to be inserted by machine.

Rob


Louie wrote:

hi anyone,

i have a small electronic component that i can't identify. it looks like
a typical 1n4001 diode, similar size and shape with axial leads, but
there's no marking on it except for a single yellow stripe at the
midpoint.

i got a switch mode power supply and it has about a dozen of these
things in the circuit.

what are they?

thanx, louie

 

[Malcolm Smith]

DSE and Jacar have them - depends on what amperage you need.

"Obake" <obake@gehenna.com> wrote in message
news:Xns93CCAC30B328Cobakegehennacom@210.49.20.254...

i'm looking for a 24v AC transformer to power a security camera and can't
seem to find a store that has them. i tried a lighting store (the old
transformer was for halogen lights) but they only have 12v transformers.
would prefer a store in brisbane or an online store.

 

[David Yates]

Try Oatley Electronics . . This 12V kit will run on 9V and 6V, but haven't
tried it at lower voltages.
http://www.oatleyelectronics.com/kits/K191.html

Excellent output!

Dave

"Mike Buckler" <someone@someplace.com> wrote in message
news:2cnnivo6msrdep47qvd1ou06med4dlsk2p@4ax.com...

Does anyone know of any suppliers in Aus that deal in white LED arrays
like this
one
http://www.theledlight.com/versalux.html

It has it's own built in DC to DC converter so that it can run from a 2.2
to
13.8 V supply.



Mike

 

[Peter Jetson]

Alan Rutlidge wrote:

6 = 600 deg F or 315 deg C
7 = 700 deg F or 371 deg C
8 = 800 deg F or 427 deg C

That's always been my understanding.

I assume the principle of operation of these tips is based on Curie Point
magnetics?

Yes.

Peter

 

[Eugene Rosenzweig]

"Alan Rutlidge" <rutlidge*nO-sPaM*@mail.iinet.net.au> wrote in message
news:3f2ca313$0$23598$5a62ac22@freenews.iinet.net.au...

Can anyone here confirm the following in relation to the Weller W-TCP-D
soldering station and the Weller TCP-1 (24 volt) soldering iron?

Weller tips have a number stamped on the end of the bit. They have single
digit codes like 6, 7, 8 etc.
Do these refer to the nominal operating temperatures of the tips?
eg.
6 = 600 deg F or 315 deg C
7 = 700 deg F or 371 deg C
8 = 800 deg F or 427 deg C

thats what I have been told

I assume the principle of operation of these tips is based on Curie Point
magnetics? ie when the tip reaches the desired temperature the iron end
of
the tip loses its ability to be attracted to the "magnetic switch" in the
handle of the soldering iron, thereby operating the switch and breaking
the
current flow to the heating element. When the tip cools the "magnetic
switch" then completes the circuit and once again current is passed
through
the heating element and heating up the tip. Cycle continues which results
in a relatively constant tip temperature????

That is correct. A very common fault for these stations we find is the
switch starts getting stuck so the tip starts overheating.

 

[Phil Allison]

"Eugene Rosenzweig" <ugn@hotmail.com>

That is correct. A very common fault for these stations we find is the
switch starts getting stuck so the tip starts overheating.

** Weller WTCPNs become "gravity sensitive" first - then stick on. That
is why I dumped mine and bought a Hakko 900M and station. Not one bug in 8
years of daily use with the SAME iron.

The tips last for years too.




............... Phil

 

[Brian Goldsmith]

"Eric" <some1@clear.net.nz> wrote


WATCH OUT WHEN YOU BUY ANYTHING FROM TRICKY "DICK SMITH"


****** Stop shouting!!!! Why "watch out"?
Brian Goldsmith.

 

[Phil Allison]

"Brian Goldsmith" <brian.goldsmith@nospamecho1.com.au> wrote in message
news:Vs3Xa.7584$bo1.4536@news-server.bigpond.net.au...

"Eric" <some1@clear.net.nz> wrote


WATCH OUT WHEN YOU BUY ANYTHING FROM TRICKY "DICK SMITH"


****** Stop shouting!!!! Why "watch out"?

** DSE dumped a lot a fake Motorola MJ15... power series transistors
in NZ.

Maybe Eric is a victim.




.............. Phil

 

[Rob Judd]

WHY ARE YOU SHOUTING?

Eric wrote:

WATCH OUT WHEN YOU BUY ANYTHING FROM TRICKY "DICK SMITH"

"Malcolm Smith" <malcolms@cyberone.com.au> wrote in message
news:3f2cb535@news.comindico.com.au...
: DSE and Jacar have them - depends on what amperage you need.
:
: "Obake" <obake@gehenna.com> wrote in message
: news:Xns93CCAC30B328Cobakegehennacom@210.49.20.254...
: > i'm looking for a 24v AC transformer to power a security camera and
can't
: > seem to find a store that has them. i tried a lighting store (the old
: > transformer was for halogen lights) but they only have 12v transformers.
: > would prefer a store in brisbane or an online store.
:
:

 

[Ian Sutherland]

Obake <obake@gehenna.com> wrote in message news:<Xns93CCAC30B328Cobakegehennacom@210.49.20.254>...

i'm looking for a 24v AC transformer to power a security camera and can't
seem to find a store that has them. i tried a lighting store (the old
transformer was for halogen lights) but they only have 12v transformers.
would prefer a store in brisbane or an online store.

Surely even Brisbane has yellow pages????????

Ian S.