Date: Tue, 4 Apr 1995 12:03:02 +0700
Well, I scored well at the ham fest. I got an oscilloscope, a frequency
counter, and a square wave generator (0-1Mhz), all for $80! I also
got a 0-300V meter, and a 0-5A RF (thermocouple type) ammeter.
Last night I observed an
interesting phenomenon that seems like it must be resonance. I connected
the red connector on the generator (can't say positive for ac :-)) to one
end of a new secondary that I am slowly working on, and the other end I
connected to the oscilloscope probe. As I worked through the frequencies,
I noticed some interesting wave forms on the scope -- they weren't regular
sine waves, but looked like a sine wave with various amplitudes. Then, as I
continued adjusting the frequency, I got a very nice regular sine wave. As I
increased the frequency, the amplitude of the wave increased up to a point.
Then the amplitude started decreasing. This appears to me to be some sort
of resonance, but the weird thing is that the frequency was 1KHz. I expected
about 4KHz, but found no resonance points there, or at least no "broad peaks".
I guess the next step will be to put the counter on the system being tested
so that I can "calculate" other resonance points. Then I'll see what happens
with the primary circuit when I get the primary circuit built.
Any tips anyone cares to offer?