coil generator : tester of coils

[dbanner]

Ok, what is your opinion on performance of circuit. Does it give accurate results for determining the parameters of coil.

[kt315]

[kt315]

meander in Greek ornament

[kt315]

... with 100nF the signal is nearly meander.
What do you mean by"meander"
Do you mean symmetrical? Sinusoidal?

that is flat of top and flat of bottom are equal.

[dbanner]

KT, could you measure frequency with 100nF cap

[dbanner]

My resonance calculator gives 272.94khz for 340uH, and 265.25khz for 360uH.(using 1000pF)
A difference of 15 to 20khz represents only a difference of a few uH, so in my opinion your device is good for testing of coils.

[dbanner]

i was being too =) but this is not sinusoidal generator. i do pics with 1000pF 2%, with 100nF the signal is nearly meander.

C = 1000pF, measured value 996 by chinese transistor tester.
L = 340uH measured by it, by another RCL tester 360.
F = 258kHz.

check who want http://www.daycounter.com/Calculator...lculator.phtml

also no generation with only bare L, without C =)

... with 100nF the signal is nearly meander.
What do you mean by"meander"
Do you mean symmetrical? Sinusoidal?

[rickb]

kt315: would you check the waveform at the junctions of vt2/c2, c2/r4 and r6/r7? Don't need pics, just waveform.

[kt315]

i was being too =) but this is not sinusoidal generator. i do pics with 1000pF 2%, with 100nF the signal is nearly meander.

C = 1000pF, measured value 996 by chinese transistor tester.
L = 340uH measured by it, by another RCL tester 360.
F = 258kHz.

check who want http://www.daycounter.com/Calculator...lculator.phtml

also no generation with only bare L, without C =)

[rickb]

I was expecting to see a sine wave. Wrong assumption?