Electronics Forum / Electronics / April 2004

The signal in my room is so strong that whatever TV cables plugged into my
TV (not connected to any antenna) become an antenna itself (the picture was
so good when the cable isn't connected to the public antenna). This is
causing me trouble when I plug the cable to the public ...

If I fitted a quieter fan to my standard PSU
would this be just as effective (with regard to noise level)
as a special build one ?
e.g: QTechnology units.

Testers for structured cabling (CAT5, etc) range from simple (order $100 Au)
to exhaustive (order $20k Au). I'm interested in the former. However, most
do only DC checks which won't pick split pairs. And price/claims are not a
guide. I've seen $99 units that pick split pairs and ...

I've got a friend who is interested in building a geiger counter.  The
circuit does not look that complicated (I'm thinking of the circuit used
by Jaycar in the October '95 edition of Silicon Chip).
However, while I suspect I can source the transformer cores, the

I put a set of four Lenmar "No-Mem" NI-MH cells into my CP-990, and
turned it on.  The battery indicator showed them as 1/4 charged, even
tho I had charged them just 6 weeks ago.  I took 'em out and measured
them with the DMM, and they measured 1.297 V, all four within a few

Can anyone suggest some reading materials that I could use to understand how
wireless sensors can externally excited, eliminating the need for batteries?
A while back, a technician from a company that made a clutch used on a piece
of machinery we make used this technique to get ...

I would like to know if anyone can explain how to determinate the
exact amount of mercury into a bulb of a medium pressure mercury lamp
(curing lamp)?
I have only information about the bulb (diameter/lenght) and

Is there anyone in here who can help me? I've hunted high and low for
information about the development of 'System-on-Chip'. Can anyone point me
in the right direction... links/urls/books/magazines etc.... Thanks

I'm looking for any information on an IC I pulled from a Jerold Cable TV
Converter.  The IC is made by ITT model TEA1009.  An equivalent IC is
ECG1763.  All I know is it's a ir amplifier.
Any information would be apreciated.

I dont know if my experiment is proper way to test circuit breaker, I
appreciate your suggestions and/or comments.
I have a Relocatable Power Tap that only has power on/off switch with
built-in 125VAC 15Amp circuit breaker.  Since the circuit breaker is rated

I am doing a project with MCU 8051 and UART scc2691 but I can't
programme the UART IC well.
I can only send the 1st character of a string that I want to send.
Terefore, I would like to know what's wrong in my programme ?

ich drei Neonröhren zu 20 Watt nehme ???
Sind die genauso wie eine zu 60 Watt ???

As you can see in these images.
Sheet One.
http://www.travel-net.com/~swiper/7000a.gif
On this shhet I am still using the 2.45760MHZ clock osc. U1.

Does anyone know the best place to try for SANYO replacement intergrated
ccts??
Specifically I need just a couple of LC4966 Quad bilateral switches (used
for audio switching)