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  1. WHONOES

    Low power audio circuit design

    Hi. The PAM8304 is not stereo output. It uses a bridged output. You need to connect your speaker directly across the two output terminals.
  2. WHONOES

    3 phase DC relay

    If your incoming 30V is positive (you gave no indication) then your FET's are upside down. Their sources should be connected to 30V. They way you have got the Opto Isolated trigger circuit oriented is also wrong. As shown on your diagram, you are turning the devices off rather than on. Your 6K8...
  3. WHONOES

    Transformer Hookup

    Hi Claude. Have you ever tried your hand at Lion Taming?
  4. WHONOES

    Solid State Bass Amp hums

    Sounds like transformer laminations then assuming it is not a toroidal. Does the hum persist with no speaker connected?
  5. WHONOES

    Solid State Bass Amp hums

    What is it like with the level controls turned to minimum?
  6. WHONOES

    Petrol kart conversion to electric

    What about a small car starter motor. They will produce several Kw of power. Suitably geared down of course.
  7. WHONOES

    Power switching relay

    I was thinking that 2 devices could be used to perform a changeover function if that is what is required.
  8. WHONOES

    Stage Line 500W amp repair project

    Is the output symmetrical about 0V at the levels you are able to achieve.
  9. WHONOES

    Power switching relay

    Are you looking for a change over function? Can you draw a diagram of how you want your system?
  10. WHONOES

    Power switching relay

    Sounds like you need a contactor rather than a relay. They are just bigger relays but designed to handle a lot of power. Perhaps something like below? 2224331.pdf (farnell.com)
  11. WHONOES

    Stage Line 500W amp repair project

    Can you track down which fusible resistor it was. Did it fail or just get hot? All that junk in my work room has taken many years to accumulate.
  12. WHONOES

    Need help identifying a Diode. Conext MPPT 60 150 charge controller.

    See link below for a data sheet. v1fm15.pdf (vishay.com)
  13. WHONOES

    Stage Line 500W amp repair project

    The output signal looks as though it might be a bit distorted. Is your scope single or dual channel? If it is dual channel, can you connect it to the output of your sig' gen' so that it is displayed on the same screen so that we can do a comparison. If not, can you take a separate picture of...
  14. WHONOES

    Stage Line 500W amp repair project

    Read these instruction through before acting upon them! Take a note of all the input and output conditions for the following tests. These tests are conducted with no output load unless otherwise stated. 1) Connect your Sig' Gen' to one of the inputs of your amp. You may have to make a...
  15. WHONOES

    Stage Line 500W amp repair project

    Remind me of where you have got to with you amp repair.
  16. WHONOES

    Stage Line 500W amp repair project

    So, you are now familiar with your sig' gen' and scope and know how to use them eh??
  17. WHONOES

    Stage Line 500W amp repair project

    I was going to suggest that you connect your signal generator to you scope and have a play with them trying out different setting to see what happens. This will get you accustomed to using them and to have some idea of what to expect with various setups. A BNC to BNC lead would be the easiest...
  18. WHONOES

    Stage Line 500W amp repair project

    Do you have a BNC to BNC lead.
  19. WHONOES

    Stage Line 500W amp repair project

    Do you have any info on your units?
  20. WHONOES

    Help with 555 latch circuit

    Can be done with a 4013.
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