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    12 volt relay's behaving strange

    I have had automotive relays which don't follow the standard terminal arrangement, but still plug into a standard relay socket.
  2. I

    tiny 12v fan for my miniature models to exhaust humidifier vapor/misthi

    What voltage is marked on the fan and what voltage are you using? The ad mentions 5-12v, but they are usually a fixed input voltage.
  3. I

    Question regarding creating a boost circuit, 24 to 200V for a solenoid

    Can you use a 24 volt solenoid?
  4. I

    Inside My Electronics Lab: Where Ideas Turn Into Circuits

    If you add a couple of mis-pronounced words and bad timing, I'd say you were spot-on.
  5. I

    Diagnosing my failed CNC controller

    The bottom picture is a standard SM power supply. Have you measured the output? (with the load disconnected).
  6. I

    Peerless instruments DT5 A

    Try 2N 3082. This comes up as an NPN transistor.
  7. I

    Electronics seems like magic!

    I wonder if you could use MIG or TIG? Must try it next time I build something. I can always grind off the bad welds with an angle grinder.
  8. I

    Electronics seems like magic!

    A soldering iron does not work if you don't know how to solder. Acetylene torches are great for electronics, especially SMD devices.
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    Burnt component on module

    You should be able to see the relay operate through the clear housing & can usually feel the relay click.
  10. I

    I need a really good inline connector

    You can use neutral cure silicon, it has no acetic acid. I have used it many times in commercial equipment.
  11. I

    PCB Component Removal

    If it's a stubborn one, wedge a small flat blade screwdriver under the cap, and a little twist while the solder is molten will pop one leg out of the hole. Don't go overboard with the heat, as you may separate the pad from the board.
  12. I

    Audio amp modification

    The new amp was donated to our organization to replace the dead one, I had bench tested it with the speakers supplied, and it worked well. I suspected that it might not be that easy to "combine" the outputs. Thanks for the info.
  13. I

    Audio amp modification

    They are standard 2 wire speakers with internal crossovers as I installed them many years ago. They are still working with a standard 2 channel output amp. I am replacing the existing stereo amp ( 1 L & 1 R channel output) with an amp that has 4 outputs - 2 high/mid frequency (L&R) and 2 low...
  14. I

    Audio amp modification

    RHS of the circuit diagram . They come out of IC 500 &501 as "high channel speaker" and "low channel speaker". So IC500 is doing the "high" amplification (midrange/tweeter), and 501 does the woofer.
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    Audio amp modification

    I want to drive a pair of speakers which have internal crossovers with an amp which has separate woofer/ mid and tweeter amps, as shown in the circuit. The existing speakers are fitted high up in a building, and have the standard pair of wires going to them. I can't get to them to separate...
  16. I

    Miserable failure to solder XLR connector to mic cable!

    I think where you mentioned "Solder gun" might be a clue. Or are you using a standard soldering iron?
  17. I

    Old board schematics

    Probably the brand on the phenolic board before it was etched.
  18. I

    Foot pedal speed control to handle pull switch?

    If you can work out the resistance of the slide pot, remove it and replace it with a flying lead to a normal rotary pot of the same resistance. You could leave all the rest of the bits in the pedal housing, maybe block the pedal mechanically from moving. Just be careful and insulate everything...
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    Electronics Knowledge and Skill Level of This Forum

    If this bloke can repair audio equipment then he MUST understand how it works to be able to repair it. Guessing or just substituting parts will send you broke quick. You don't have to be a "highly trained Electronic tech" to be able to repair equipment, and just knowing "electronics at an...
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    Electronics Knowledge and Skill Level of This Forum

    Most here would have started in their early teens or even earlier building the types of projects you mention. A lot went on to trades (like myself), and would have gained their knowledge through many years of practical application. Trying to figure out what you are asking is like the old "how...
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