How does the pulse detector coil and damping resistor smooth the waveform？

[kt315]

smooth like mine a-s. but very smooth! RUN BACK! get UNIDEAL! get OVER-DAMPING NOT DAMPING!

[wyl123]

what you mean is not BEST? those asiatics women around you are best? LOL ))) begin from 2k2 - give the pic
1k - give the pic
820 ohm - give the pic
680 ohm - give the pic

No, the waveform is good enough, but the depth is not good! Asian women are beautiful?：大声笑：

[kt315]

then try use non-chinese made LF357!

[wyl123]

then try use non-chinese made LF357!

I bought good quality (the seller said it was imported), I think my 357 is still very good!

[Carl-NC]

I think you have a different problem somewhere. A damping R = 680 should be "close enough" to make it work. Look very closely at resistor values, make sure there are no mistakes.

[kt315]

then throw out your DP and do another schematic!

[wyl123]

I think you have a different problem somewhere. A damping R = 680 should be "close enough" to make it work. Look very closely at resistor values, make sure there are no mistakes.

My coils are 320uh and 1.9 ohms. It is a multi-core cable made in China. I also think it may not be tight, causing an abnormal distributed capacitance.

[dbanner]

Is your damping resistor 50 ohms?
Make new coil for testing purposes, higher inductance. Use ordinary enamel copper wire. 500-600uH, 680 ohm damping resistor.
Also make R6 680R

[Carl-NC]

My coils are 320uh and 1.9 ohms. It is a multi-core cable made in China. I also think it may not be tight, causing an abnormal distributed capacitance.

Do you have an oscope? Remove the damping R and measure the ringing frequency. You can calculate C from this, standard w=1/sqrt(LC). You can also wiggle things to see if the frequency changes a lot, indicating problems.

[wyl123]

then throw out your DP and do another schematic!

Lose the original dp, re-create a new dp?

[dbanner]

I don't know why people have problems with easy circuit like dp. I am novice in electronics, but never had been situation in which it became mission impossible. Work the problem methodically, step by step. You will find answer.

[homefire]

I don't know why people have problems with easy circuit like dp. I am novice in electronics, but never had been situation in which it became mission impossible. Work the problem methodically, step by step. You will find answer.

That Requires Problem Solving Skills .

[kt315]

DB DP is not needed in damping resistor tuning. in original schematic it is 2k2 and thats was enough. the problem is those people damping sometimes. i think they would steal
ITMD and translate it in mandarin.

[dbanner]

2.2k is adequate damping resistor in Delta pulse slow pI. Yes of course. Problem is people always want to change parameters of circuit even before they get it working with stock values. This is folly.

[dbanner]

Build Delta pulse with original parts values and recommended coil and it will work very good. Then you know you have no fake chips etc. Only then should you attempt to modify circuit for personal choice of coils etc.