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  1. Tha fios agaibh

    Speaker Noise Problem

    I have no idea what that means. Nor what a far sound/bus loss is. Do you gave a schematic you can post? Is it a 60cycle hum, or more like white noise sound? How loud is this noise? What's your experience level? You need to offer as many pieces to the puzzle as you can for one of us to help.
  2. Tha fios agaibh

    Trying to figure out what this is..

    I don't think your going to get much help here without being more specific. You could try making a schematic and listing the markings on the components. Then it may be more apparent what we are dealing with.
  3. Tha fios agaibh

    Speaker Noise Problem

    Can you describe the sound better? Is it like a hum or a squealing sound? If the latter, it might be a cracked board or bad solder joint causing feedback oscillations. If you checked that already, it is probably a component failing. They can sometimes be detected by applying heat or cooling...
  4. Tha fios agaibh

    Making your own twisted shielded pair?

    I agree, It's not worth your while. The foil usually has an insulating layer on the inside to insulate the small drain wire for the shield. Another thing is when you twist the wires, it will shrink about 1/3 of your original length. Whether or not it's good enough, depends on what your using it...
  5. Tha fios agaibh

    Leading and Lagging AC Power

    Thanks Adam, I see what your saying. Academically, It's common to ignore some factors in order to simplify things for the student trying to learn the basics. Such as conductor resistance, impedance, or efficiency in a circuit. I believe your ideal inductor could be designed perfectly, and and be...
  6. Tha fios agaibh

    Leading and Lagging AC Power

    I admit that was not a good example to use here, and should have said signal loss instead of line loss. But it's related in a way; Yes, frequency response is improved (restoring higher frequencies) by adding inductors (voice coils) to counteract capacitance which is caused by long spans of...
  7. Tha fios agaibh

    Leading and Lagging AC Power

    Thanks Adam, I understand what your saying, and agree, but don't understand the "ideal inductor" part. Wither your talking about a magnitizing current, or an amount less than that, your just talking about varying degrees of magnetic fields and inductance that can cause a low power factor. Right?
  8. Tha fios agaibh

    Leading and Lagging AC Power

    Not sure what you mean by "requiring" magnetizing current. Any inductor, or conductor for that mater with an electric current running thru it has a magnetic field around it. Remember the left hand rule?
  9. Tha fios agaibh

    Leading and Lagging AC Power

    An opposite example is how telephone companies use inductors every 1/2 mile or so to counteract line losses. This is due to capacitance, caused by running wires for long distances side by side.
  10. Tha fios agaibh

    Rest in Peace, Kris

    I highly admired the way that he would patiently answer any questions, even the dumb ones. He would devote not only his time to work up a schematic for a complete stagger, but a complete parts list to boot! Ones impact on humanity is more than we realize. Little things, like how you treat...
  11. Tha fios agaibh

    "notsohot" project - mains power cycler for heating appliances

    Nice circuit ChrisBlueNZ, seems like a great way to save power and add some temperature control for resistive loads. I wonder if you have plans for this, or just something your tinkering with. It probably would not fly as a stand alone "appliance power cycler", because you'd never get UL, EU...
  12. Tha fios agaibh

    Trying to repair a shaver charger

    I agree, not the best meter for testing diodes. Most Diodes are pretty hardy and can withstand quite a bit of heat. So, I'd be surprised if you blew them both up. Since you don't have access to a DVM with a diode function, you could use a continuity tester, or just use components of a flashlight...
  13. Tha fios agaibh

    Help with heater

    Make sure there is a working tilt switch in the circuit to avoid a fire in the case it gets knocked over.
  14. Tha fios agaibh

    Unknown Power Inlet

    I'm sure they can be drilled out, no matter which kind of rivet.
  15. Tha fios agaibh

    Wiring a fan

    An important step that's often overlooked, is to verify your tester is working before you test the circuit your working on. One could test a circuit your working on and say to oneself "yep, power is off" when your tester could be indicating power off on a live circuit.
  16. Tha fios agaibh

    Unknown Power Inlet

    No wonder we couldn't find it. Thanks for following up.
  17. Tha fios agaibh

    Wiring a fan

    "Burning one's house down due to a simple branch circuit overload isn't likely if your service is adaquately protected by fuses or circuit breakers " Really? Just because your Service has the proper over current protection does not mean the branch circuit can't be overloaded and cause a fire...
  18. Tha fios agaibh

    Wiring a fan

    Some good points Gryd3. But I agree incomplete. I'm critical of DIY posts because there is so much disinformation out there. I would be happy if all one takes from this is ; Don't trust what you read by some "professional" on the internet. (And I am a professional) There is a lot of factors...
  19. Tha fios agaibh

    Wiring a fan

    I agree people often call the grounded conductor a neutral, when technically it's not. Nevertheless, the point I was making was that the blue (N) is a grounded conductor, and any wire tied to it (such as a fan wire) becomes a grounded conductor. The color coding is used to differentiate what...
  20. Tha fios agaibh

    Wiring a fan

    I don't mean to nit pick but here is my 2 cents; "...then a return conductor would apply" A return conductor always applies. "..normally the feeder.." This applies to branch circuits also. " ..If he wants to be safe or doesn't feel safe.." Houses burn down all the time because someone felt...
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