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  1. bushtech

    Need help finding power supply

    Op last seen April 14
  2. bushtech

    Denon AVR-1912 E2/EA

    FB =Ferrite bead? An RF suppressor
  3. bushtech

    K40 Laser Cutter Upgrades

    Off the wall suggestion: Give the cut areas a light sanding with some very fine sandpaper. Might clean up nicely
  4. bushtech

    K40 Laser Cutter Upgrades

    Agree with kellys_eye. I feel you need to move some serious air. Something like opening the valve on a scuba tank:)
  5. bushtech

    Laser for welding small plastic pieces?

    I've been battling for years to succesfully glue broken plastics eg. dropped cellphone casing. But I've discovered this product with which I'm having success: https://www.bostik.com/southafrica/Bostik-Products/hard_plastics_super_glue
  6. bushtech

    K40 Laser Cutter Upgrades

    Nice work Ian! Is the shadowing caused by diffraction of laser by smoke or wood charring?
  7. bushtech

    Unknown component

    Also used as gas control in gas geysers
  8. bushtech

    Samsung Syncmaster 740BF repair

    ESR Meter Afraid the Chinese were not that diligent. I can't see any relevant diodes But I think I found that magic elusive place where the smoke escaped But I can't see any damage. Pulled the chip and absolutely no damage. But thank you again St. Edd. Now I know what that small...
  9. bushtech

    How to use LTspice

    Glad you got it working
  10. bushtech

    Samsung Syncmaster 740BF repair

    Thanks St. Edd, to the rescue as always. Yes, all caps will be tested, once I get a new ESR tester. Rookie mistake with the old one, connected a charged cap, poof, magic smoke escaped. Sigh! You live and learn. This monitor got hit by lightning, so I suppose normal rules of deduction won't...
  11. bushtech

    Samsung Syncmaster 740BF repair

    Thanks dave9 and *steve* When Mantech show no stock or price they are out of stock. The BD do indeed show very low resistance both ways, DMM shouts, so I think they are probably ferrite beads. New component to me, dr. google will be consulted.
  12. bushtech

    Samsung Syncmaster 740BF repair

    Thanks *steve* By rectifiers do you mean the diodes? Regarding the rectifiers/diodes: A diode is normally marked D on the pcb and zener is marked ZD. But what on earth is a BD? Looks like an overweight diode without any markings. You can see one of them between the two staggered diodes and the FET
  13. bushtech

    Samsung Syncmaster 740BF repair

    I found a swollen cap (replaced) and a FET (DMO565R) split open. The negative of the cap is connected to the ground of the FET so I hope it's the failed cap that popped the FET. Board: The big cap at an angle is the one that I have replaced FET: My problem is the FET Both Mantech and RS...
  14. bushtech

    Simple Metal Detector Circuit Keeps Beeping - Help

    Yep, OP not been back since Tuesday
  15. bushtech

    DMCA weirdness

    I've just downloaded and opened that ucamco pdf without any problems
  16. bushtech

    Outlet got wet

    I'm not an electrician but a ferrule could be used to extend the ground wire to allow for reconnecting. If the OP does not have the correct crimper a carefully used side cutter would do in a pinch. The missing ground wire here means that all plugs downstream are also without ground
  17. bushtech

    Anyone know what type of resistor this is?

    Hope that component behind it isn't a charred MOV.
  18. bushtech

    Denon AVR-1912 E2/EA

    And best of luck with the eye op. Manual should make more sense afterwards:p
  19. bushtech

    Hobbyist Station

    Have a look at banggood, they ship from a Canadian warehouse so you might get a pleasant surprise. Something like this: https://www.banggood.com/FX-951-220V-EU-Plug-Solder-Soldering-Iron-Station-p-932706.html?rmmds=search&cur_warehouse=CN
  20. bushtech

    How to use LTspice

    Not cutting open working thermistor. If it helps the thermistor measures 6.6kΩ
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