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Offline haikel774Topic starter
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« Reply #10 on: October 27, 2011, 01:10:06 am »
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hi Japanese


with all respect


thank you very much

best regards

H.

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Offline haikel774Topic starter
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« Reply #11 on: October 28, 2011, 04:03:24 am »
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hi Japanese

I changed the NE555 and the diodes but the same problem the 555 to warm I even made ​​a new plate is it still the same problem


I believe there is an error in the area of ​​555


thank you

best time


haikel

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Offline japanese
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« Reply #12 on: October 29, 2011, 09:40:56 am »
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Hi haikel774
                        C26=10n
- remove U11 and test volt at pin 3 of u10.
- connect U11 and test volt at  pin 3 of u10.
- test volt at pin1, pin 3 of u11.

 best time
j.

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Offline haikel774Topic starter
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« Reply #13 on: November 02, 2011, 09:10:55 am »
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hi japanese

the detector works but its detection and very low and it does not descrimination



thank you

best regards

haikel


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Offline japanese
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« Reply #14 on: November 02, 2011, 11:40:37 am »
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Hi haikel774
               R48=56K ADJ FREQ. (~400HZ),R47=39K ADJ BW --->TO good detection, Must Measures the freq. at pin 3 of U6 TO be in rang ~400 hz.
the coil must be ,500 mm Round 15 tu 0.50 mm / 0.20 mm2 400 µH 2.0 Ohm .
1-RV1 (DELAY) put in max sensitivity  (do not touch ).
2-RV2 discrimination> ADJ in half  and not touch .
3-RV4 OFSET put in max sensitivity.
4-ADJ RV3 IN BEST position when LED GREEN SEEM TO BE LIGHT.

best time
j.

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Offline haikel774Topic starter
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« Reply #15 on: November 02, 2011, 01:12:13 pm »
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hi Japanese

thank you.

I can used 1M coil

best regards

H

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« Reply #16 on: October 30, 2012, 11:56:27 pm »
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Last post is a year ago so I don't know if problem was fixed or not but I noticed that the designation for Q1 was said to be 2N2686 but that is incorrect.  The proper transistor is a 2N2646 which is a p type unijunction, I tried to see what 2N2686 was with Data Sheet web site and they said it didn't compute.  I would say if you are not using the correct transistor in the Q1 spot.

Gramps


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It is better to die fighting evil than to live under it.
Offline haikel774Topic starter
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« Reply #17 on: October 31, 2012, 08:24:10 am »
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hi gramps43

the problem is not resolved. what should I do?

thank you

haikel


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Offline Gramps43
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« Reply #18 on: October 31, 2012, 02:19:04 pm »
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Haikel,

I am at present gathering parts fot the A_PULSE2 and hope to have it done by the first of the year.  I had a devil of a time finding the 2N2646 (Q1) but finally found it at Digi-Key, or at least the equivalent, which they list as a J175_D26Z.  Had same problem with U2 but Digi-Key came to the rescue here also.  As to your situation I would try to find a J175 for the Q1 spot then with a good magnifying glass check every nanometer of the board for shorts between traces and possible bad solder joints.

Gramps

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Offline haikel774Topic starter
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« Reply #19 on: November 01, 2012, 03:02:44 am »
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hi gramps

thank you very much

haikel

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