Electronics Forum / Electronics / December 2005

Greetings group.
On Sharp microwave ovens they give 2 output power values.
e.g. IEC 900W      and     AS 750W
Which value should I use when I look for a replacement magnetron in the

I am inexperienced with analog thingy.
My digital clock is 40MHz, modulates a 10mbps bit stream into some
waveforms.
The modulated output value lies between two narrow bands, 0-63 for input

I am injecting the DAC output from TI DAC290x-EVM to ADC (Analog AD9218).
When I connect I channel from DAC to I & Q channel of ADC, I am seeing
vastly
different digital outputs on ADC (sampling three pins on oscilloscope). What

I just found out that the Bass Link cable between Vic and Tas uses HV DC.
I was always under the impression that AC had less transmission loss.
Is that only under certain circumstances? Is there some other reason for
using DC?

Dear clever folks;
I live in Denmark have a bought a fine American telephone.
The Caller ID function doesn't work, since we use a different system
here. (America uses  Bellcore FSK, Denmark uses DMTF).

South-West Sydney area
Nothing overly special, I am just having a clean out and this stuff
would otherwise have gone into the bin.
I've got a beer box full of odds and sods.  Some Coax, a few strips of

I'm a software developer interested in creating an inexpensive device
that measures how fast I'm pedaling on my stationary recumbant bike and
that communicates that information to my computer via USB or RS-232.
Probably something along the lines of putting a magnet on the pedal and

Could someone please tell me the voltage rating of this cap.
It's a greencap and the only marking is 2G104K.  It's part of a voltage
doubler in a bug zapper.  It's dimensions are 50% larger than the 100V
greencap that Tricky Dicky sells.  If that's a help.

I looked at the solarbotics website. Thanks. It's always fun to find
new website with "cool" hobby stuff to amuse me. The driver for you
motor could be done with a handful of simple parts; I'd use
half-bridge of transistors, a timer and some simple logic to perfor

I have an amplifier circuit with AGC.  I am told that the AGC circuit
attenuation of this amplifier can be determined from the voltage across a
diode in the AGC circuit.  As I understand it, the voltage across a diode is
logarithmically related to the current, with the current, ...

For a flyback SMPS, if the output [with feedback] is loaded, the
switching duty cycle goes up.
In this situation, what would happen to voltages on other outputs ?
(They remain constant I guess, but why?? Shouldn't they shoot up?)

I need to make a circuit that will produce either one, two or three short
consecutive beeps depending on the input signal it recieves.
For example:
 Input 1  = One beep  (could mean 'ON').

I am looking for an ac plug for a Fairchild/DuMont 708A Oscilloscope.
The plug is round with 3 round pins. Is anyone willing to sell me this
part? Does anyone know where I can buy one?
Thanks.

Is there a cleaner or spray for the contacts on a remote?
I have an (old)  Zenith VCR,  and  remote.  I have to daily clean the
remotes contacts, and rubber pads,  in order for it to operate.
Many functions are not available from the unit itself, only the remote.  So

My Sony  CCD TR55e camcorder which I got as a faulty item
won't play tapes but does have a working viewfinder ....
Looking through this unit it looks like a black and white CRT picture
but if you take the eyepiece off there is a small square white screen