Delta Pulse

[Geo]

Ok Geo, what about if i ise 1.5 mm wire? or may be 0.85mm wuth a resistance in series to get around 3.5 or more?
Regards
Nelson

With 0.85 maybe to work. I know many people that made the coil with 1.5mm with very good results.
Here at Greece, we use the PI detectors only with Big coils (1x1 or 2x2 m)

[Geo]

Hi Geo and thanks for reply.
Ok i got the picture. By the way, if i use a F meter, where i should connect it?
Thanks
Nelson

Pin 5 or pin 9 of LM556

[nelson]

Ok Geo, what about if i ise 1.5 mm wire? or may be 0.85mm wuth a resistance in series to get around 3.5 or more?
Regards
Nelson

Original DP has a coil of 1.1 x 1.1 m with 16 turns. If you will make it 1x1m then wind 17 turns. Use wire with 1mm diameter. If the DC resistance is lower than 2.5 Ohm then connect a resistance in series, so to measure at the connector a dc resistance of 3.5 ohm (3 ... to 4 ohm is ok).
Regards

[nelson]

Hi Geo and thanks for reply.
Ok i got the picture. By the way, if i use a F meter, where i should connect it?
Thanks
Nelson

Hi Nelson
if you have Oscilloscope, connect the probe at the gate of IRF740 and measure the time between two pulses ( when they rise). Then frequency is F=1/time. Frequency counters are not accurary. I have 3 fr counters and only one (hand made) shows the real frequency. The other two reads duble frequency....
Regards

[Geo]

Anyone has experiment with 1X1 meter coil for delta pulse?
What are the results and what are the coil´s values.
I need it to make one.
Thanks
Nelson

Original DP has a coil of 1.1 x 1.1 m with 16 turns. If you will make it 1x1m then wind 17 turns. Use wire with 1mm diameter. If the DC resistance is lower than 2.5 Ohm then connect a resistance in series, so to measure at the connector a dc resistance of 3.5 ohm (3 ... to 4 ohm is ok).
Regards

[Geo]

Hi, can anyone tell me how to measure frequency on delta pulse?
Regards
Nelson

Hi Nelson
if you have Oscilloscope, connect the probe at the gate of IRF740 and measure the time between two pulses ( when they rise). Then frequency is F=1/time. Frequency counters are not accurary. I have 3 fr counters and only one (hand made) shows the real frequency. The other two reads duble frequency....
Regards

[nelson]

Hi KT315.
Can you tell me what were your results with 1X1 meter coil and what are the values to try to build one.
By the way my delta pulse is now working. I also whant to know how to masure the frequency?
In advance many thanks
Nelson

...

[nelson]

Anyone has experiment with 1X1 meter coil for delta pulse?
What are the results and what are the coil´s values.
I need it to make one.
Thanks
Nelson

Try to wind 22...28 turns at your coil. Detector will come very stable and you will work always with full sensitivity . Micron Electronics says that DP with a coil 1x1m can detect on air an object 1m x 1m at 3.5m
10cm x 10cm at 1.3m
25cm x 25cm 1.8m
50cm x 50cm 2.6m

[nelson]

Hi, can anyone tell me how to measure frequency on delta pulse?
Regards
Nelson

Ohh i forgot...... My DP works at 350Hz and the coil (10 in) has 8.5 ohm resistor (without resistor in series), i don't remember about turns and wire diameter.

[Noemio]

Nice joke, Tarsos!!! Throw away your pliers, my friend, are made of plastics...

[kt315]

cool! it's a magic but this is only 'at air' test, Tarsos. in ground you will get something another.

[TARSOS]

Hi
is delta pulse discriminator detector..?

yes ... excellent ..

link below to watch the video..

http://video.google.com/videoplay?docid=6416708733701088810

554

[kt315]

you wrote: I dont have a signal from pin 12 of 4066, that goes to pin 10 of 4538.

I dont have a signal to pin 12 of 4066, that goes from pin 10 of 4538.

[nelson]

Ok my friends, this afternoon after work i ll follow your instruccions to check it.
After that i ll post results, that i may help someone else if this problem happends to anyone.
Regards
Nelson

Ahem, I left something out... .

D2B and D3B "Q" outputs should look alike except for a DELAY on D3B.

D3B output must first have an input from D3A on pin 11, so check pin 11. And check the diode VD6.

Nelson, you have outputs from all the 4538s but one? Check the diode VD6 on 4538 D3B-14. Diodes VD5 and VD6 allow D2B and D3B to share the same timing components R8 and C5. TR5 signal should look just like TR4.

porkluvr