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Another option to prevent ringing, might be to switch off the
polarising current slowly - say 100mS which is 75 cycles of your
ringing tone, but a small percentage wasted of the couple of seconds
expected detection time.......
If you are using a transistor to switch the current, you could
experiment with an electrolytic cap on its base cct...
John
-----------------------------------------------------
Cavalier Electronics
L'Agulhas
South Africa
I just looked to my recordings to examine the frequency, it has
been about 750Hz. This is rather 1/3 of the
expected proton frequency!
The expected 2075 Hz was not to see on the scope. So I guess the
water inside the toroid isnt enough magnetized.
I'm rather sure of this because I can hear a noise coming from the
amplifier and filter which sounds like
a starting, a "pinging" oszillator at about 2khz and interferes
with any other signal (may be the proton signal). Its interesting
that this interference is allways there (without charging the
coil!) and varies in frequency (maybe 2-3 Hz) without any period,
its like a chaotic change. Maybe this comes from the geomagnetic
field. I have to do some more experiments on the weekend.
polarising current slowly - say 100mS which is 75 cycles of your
ringing tone, but a small percentage wasted of the couple of seconds
expected detection time.......
If you are using a transistor to switch the current, you could
experiment with an electrolytic cap on its base cct...
John
-----------------------------------------------------
Cavalier Electronics
L'Agulhas
South Africa
I just looked to my recordings to examine the frequency, it has
been about 750Hz. This is rather 1/3 of the
expected proton frequency!
The expected 2075 Hz was not to see on the scope. So I guess the
water inside the toroid isnt enough magnetized.
I'm rather sure of this because I can hear a noise coming from the
amplifier and filter which sounds like
a starting, a "pinging" oszillator at about 2khz and interferes
with any other signal (may be the proton signal). Its interesting
that this interference is allways there (without charging the
coil!) and varies in frequency (maybe 2-3 Hz) without any period,
its like a chaotic change. Maybe this comes from the geomagnetic
field. I have to do some more experiments on the weekend.