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  1. B

    Stage Line 500W amp repair project

    To an extent yes
  2. B

    Stage Line 500W amp repair project

    Yes i have already done this as i have 2 sers of BNC to crock clip leads
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    Stage Line 500W amp repair project

    No, but i can get one if needs be ?
  4. B

    Stage Line 500W amp repair project

    This is the scope and sig gen, both were ebay purchases https://www.ebay.co.uk/itm/With-Case-Test-Clip-Oscilloscope-LCD-DSO150-Digital-Accs-Useful-Durable-/303827383640?_trksid=p2349624.m46890.l49292...
  5. B

    Stage Line 500W amp repair project

    So how do i use this equipment?
  6. B

    Stage Line 500W amp repair project

    Not sure how good this cheap stuff is going to be, but its a start
  7. B

    Stage Line 500W amp repair project

    I have just tried reversing the wires, that didnt work either, possibly as i am using a laptop and not a desktop with dedicated MIC input, i dont think i am going to be able to get this to work with what i have, I could try one of these...
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    Stage Line 500W amp repair project

  9. B

    Stage Line 500W amp repair project

    I think i see the issue here, with another set of headphones the computer sees the mic and lets me select it, with the lead i have cut up it does not!, Is it possible it has something to do with the small board the MIC is attached to on the headphone lead ?
  10. B

    Stage Line 500W amp repair project

    1.41vdc
  11. B

    Stage Line 500W amp repair project

    I currently have it wired, green to pin 3, and yellow to pin 4, See second diagram below
  12. B

    Stage Line 500W amp repair project

    At 1:1 I get 1.402vdc That is with the positave probe on the base of the audio jack and the negative probe on the second connection point along, the BNC to crock clips have red and black clips, i set red to + and black to --, I am wondering if i have the connectiong reversed to the phono jack
  13. B

    Stage Line 500W amp repair project

    The probes i have are said to 100Mhz , does this mean that it there capable limit?, i think i had my sig gen much higher than that
  14. B

    Stage Line 500W amp repair project

    The box only has 1 BNC input for the 1 probe, and 1 audio jack as the output to the soundcard/laptop, I do have meter leads with crock clips and do have a BNC to crock clip lead
  15. B

    Stage Line 500W amp repair project

    This is confusing, i dont understand the point of this lead when i can just use my meter leads to connect where needed ?
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    Stage Line 500W amp repair project

    What is a flying lead ?
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    Stage Line 500W amp repair project

    So basically connect a 1.5vdc battery to the input and use my meter to read the voltave at the headphone jack ?
  18. B

    Stage Line 500W amp repair project

    It is completely counter clockwise, so at 1:1
  19. B

    Stage Line 500W amp repair project

    I assumed the black is MIC input and gold is ground, i connected green to ground and yellow to mic black, plugged everything in and connected a probe to the box, then setup the sig gen with a set of crock clip leads, i get nothing :-(, i have continuity from the board to the headphone jack so...
  20. B

    Stage Line 500W amp repair project

    Well its in the box, but does it work ? How do i test it ?
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