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  1. 73's de Edd

    Diode identification help

    Sir Steve Goldson . . . . . Call up this link below: http://www.datasheet.hk/download.php?id=1172460&pdfid=427240147DED8817F6B655FA97A3757B&file=0112\10dra60_1190602.pdf SURELY you are NOT going to be having that ODD interfacing package . . . . so hit CANCEL and BLAMMMMM THERE IT IS ...
  2. 73's de Edd

    Remote Control - The Right Way To Fix It

    . Sir itai shi. . . . . . . Mac Guyver procedure: After going the routes suggested above . . . .you can see if the 455 kHZ ceramic resonator is interfacing with your COB, by use of a small AM radio. That small sizing will let you get the internal loop antenna of the pocket radio belly...
  3. 73's de Edd

    Piezo as a contact microphone

    . Sir Carel . . . . . . . " to detect water flowing through a pipe " A that sensing point . . . . .would that be plastic -copper or galvanized iron or ? type of pipe ? 73's de Edd .
  4. 73's de Edd

    Blown guitar amp! SOS!

    . Sir Pharaday (shield?) . . . . . . . Blown guitar amp! SOGA! Since you are Amerikanski and not using 220VAC the o-fish-ul Fender schematic sez your unit uses a 500 ma fuse. BUT since you have a blown fuse . . . . .but not HEAVILY BLACKENED internally, best you initially use a table...
  5. 73's de Edd

    Blown guitar amp! SOS!

    . Sir Pharaday (shield?) . . . . . . . Best as I can make out . . .still looks like a good slow blow fuse type to me. Now is the time when you use an ohmmeter to tell for sure. WHAT ! . . . . . . . . . no ohmmeter . . . along with minimal techno expertise ? Then . . . . . . . merely...
  6. 73's de Edd

    Power MP8226 IC

    Sir Pavle . . . . . . . Any chance that your question is being directly associated with this ? http://www.pdf-archive.com/2013/08/21/samsung-gt-i9300-galaxy-s-iii-service-manual/samsung-gt-i9300-galaxy-s-iii-service-manual.pdf Possibly . . . . .you blew your micro USB port ? If so . . . ...
  7. 73's de Edd

    Can't identify if transistor is PNP or NPN?

    . Sir Nicholas MacNaughtan . . . . . . . In this manufacturers cases point of reference, it is being the 45 degree slope, that's notching off of the whole top corner, above the collector side of the transistor. 73's de Edd .
  8. 73's de Edd

    Someone please help clicking relay

    . Sir . . . . . . . . bean Looks like there is absolute minimal info on any control board info that they are wanting you to know in that literature.. But, in looking at the mechanical aspects of its manner of construction, there are absolutely multi mechanical aspects, able to make noises...
  9. 73's de Edd

    Can't identify if transistor is PNP or NPN?

    . Sir Nicholas MacNaughtan . . . . . . . Had to dig thru ye olde design reference library for that one . . . . From the words uf der Katzenjammer Kids . . . . . . Ahhhhhh chesss ve dun just bin gettink in und fresh 'chipment dis mornink . . . . und vud you be wantink vit der left...
  10. 73's de Edd

    search for a Varistor replacement compatibility

    Your images are not making it . . . .are you using a hosting site ?
  11. 73's de Edd

    search for a Varistor replacement compatibility

    .. Sir itai shi. . . . . . . Looks like the electrical specifications are being the same for the newly found replacement unit. That original unit just has a surround housing and some dead space around it. Just about ALL other units look like the newly referenced unit . . .excepting the...
  12. 73's de Edd

    Need help designing / understanding this 'circuit'

    . Sir Brad Hays . . . . . . . You have just received the methodology of being able to switch on /control your heavy 1500W device by placing a large power relay / contactor at its side. and then using a low voltage . . .usually 24VAC . . . . to actvate its coil. That then gives you...
  13. 73's de Edd

    Switch problem. Please help

    . Read procedure again . . . . . . " vewy-vewy cawefully" . . . . The sliding of the original switch to its center dormant position , takes care of the ABC prime contact action, in opening the A prime to B prime connection. You use your existent "remote" switch, connected up, just as you...
  14. 73's de Edd

    Esr Meter Build

    .. Sir pete g . . . . . . . Part 1 . . . . . Vice that loop gain alteration of the U1A op amp oscillator circuit , a less circuit invasive and altering procedure would have been to insert a drop resistor between the osc op amps output and C2 coupling capacitor. Initially try using 220...
  15. 73's de Edd

    Switch problem. Please help

    .. Hammerhorror . . . . . . . . . Indeed, the units installed switch is being a Double Pole Double Throw switch. Mechanically to electrically explained / compared , the assigned A is being one pole and the naturally " implied" A prime pole is being the one just above it. . . . .same way...
  16. 73's de Edd

    Switch problem. Please help

    .. Hammerhorror . . . . . . . From the limited info given and if being a slide switch, if this unit is left in AB position the remoted switch can close A to C or open it. 73's de Edd . .
  17. 73's de Edd

    Can't find datasheet or info on a transistor T477 185,552

    Sir Bastien01. . . . . . . I'm currently studying the board of an old video enhancer of the 80s. With that meaning that you are going to use it to enhance the high end slope of a video waveform for less degradation in its being copyied over to a second tape . . . . .or that you are...
  18. 73's de Edd

    Can't find datasheet or info on a transistor T477 185,552

    SIr Bastien0 . . . . . . . . None of my shelves of ole design databooks of the 70's and 80's help me on that number . We can consider that is a small signal NPN and I CAN tell you that the EIA code of 185 tells us that was a MOTOROLA manufacture. The 552 is indicative of it being stamped as...
  19. 73's de Edd

    Help Identifying a Microswitch

    . . Sir Daniel Benson. . . . . . . I would just bet that centered under that plastic housing, there is REALLY being a TACT switch. Confirm that of your 6 metal tabs that come down from the plastic to be soldered to copper lands on the PCB for mechanical support; that four are on the...
  20. 73's de Edd

    Help with an ultrasonic rangefinder for blind people

    . Shreyas Kannan . . . . . . . Quite a formidable task . . . .for the unitiated . . .here is what you are up against . . . in needing good lateral coverage. http://grathio.com/2011/08/meet-the-tacit-project-its-sonar-for-the-blind/...
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