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  1. Ylli

    Comedy Thread

    It's a joke Edd. Have you seen the first images fro the James Webb Space Telescope? Credit for the image to Elon Musk/twitter
  2. Ylli

    Comedy Thread

  3. Ylli

    Loss of voltage from poor wire winding and leakage inductance?

    What core material? There is always going to be some leakage inductance - flux that is not being confined to the core and is escaping. A toroidal core 'concentrates' the flux but does not fully contain it - the flux you are inducing on one side of the form is not all making it to the far side...
  4. Ylli

    Cannot find this specific resistor, help!

    Measured in-circuit or out, that resistor is bad.
  5. Ylli

    Capacitor between collector and emitter help

    Please see Post #2.
  6. Ylli

    Cannot find this specific resistor, help!

    You want resistor that is advertised as "Pulse Withstanding".
  7. Ylli

    Cannot find this specific resistor, help!

    Possible meaning of the "SP": http://www.sanwatsusho-global.com/product/15/15_01_02.html
  8. Ylli

    powering a dc motor from ac?

    As others have said, no smoothing capacitor is necessary. In fact, if this is a "universal" motor (brushes, wound rotor and stator), then it most likely run on the raw AC just as well as DC.
  9. Ylli

    Replacing electrolytic cap with non-polarized a mistake with tube radio?

    Good point, but I would still bet there is a bit of a surge as the rectifier filament starts to warm up and that 35W4 starts to conduct. But perhaps that is a 'feature' that reduces 'turn on' time.
  10. Ylli

    Replacing electrolytic cap with non-polarized a mistake with tube radio?

    To say nothing about the turn on surge - surprised that filament section doesn't vaporize. Normally the whole filament is in the series string and a panel lamp is tied to between 4 & 6.
  11. Ylli

    Balanced load, splitting a 220V outlet

    Would work just fine - any imbalance in load would put current into the neutral, but as long as it is sized properly that should not be a problem. Is it to code?? Would need to ask an electrician or electrical inspector.
  12. Ylli

    Replacing electrolytic cap with non-polarized a mistake with tube radio?

    The only electrolytic / polarized capacitor in that circuit is C11 (A) and (B). Those old wax /paper caps quite often had a black band around one end but that was only to mark which lead was connected to the outside foil. The outside foil was usually connected to the lower impedance side of...
  13. Ylli

    Comedy Thread

  14. Ylli

    Fisher tube amp distortion

    That's a preamp - it is not designed to drive speakers.
  15. Ylli

    Comedy Thread

    Compliments of a tweet by Elon Musk No worries, Situation is under control.
  16. Ylli

    Audio emitter resistor

    Do be sure to use a dim bulb tester (DBT) when you first fire it up, or you are likely to quickly burn out the new resistor.
  17. Ylli

    Audio emitter resistor

    ..or a *dual* 5W 0.22 ohm resistor. If it has three leads, it is two resistors in the same package. I've always just replaced those with two separate resistors. edit: Yup, a dual. But as other have said, if one of these is bad it was most likely caused by failure of one of the output...
  18. Ylli

    LED resistor value/voltage doesn't make sense

    LEDs are *current* driven devices. Forget about the voltage across them (unless your circuit is marginal on headroom). Just let the LED drop whatever it likes. The brightness is set by the current through the LED, not by the voltage across it. Put that voltmeter away and just select a...
  19. Ylli

    6.3vac heater windings

    In general you do not want to parallel two transformer windings, even if they do have the same voltage rating. It is not physically possible for those two 6.3VAC windings to be identical, and as such any imbalance will cause energy loss and heating in the transformer. As an example, assume...
  20. Ylli

    Adding Frequency Scanning to any AM/FM/SW Radio

    I think he is trying to create a "Spirit Box".
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