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  1. AnalogKid

    Did you ever make any circuit or device for yourself?

    A couple of different intercoms, some power supplies, a battery charger for an old photo flash, a distributed control system for my garage doors, an audio/video routing switcher, a very small, very basic time-domain reflectometer (TDR), a 1-channel color organ (just one light, not three). ak
  2. AnalogKid

    High Current Issue with Complementary 300W Amplifier

    The sim results are based on perfect components that are perfectly matched. The real world has neither. ak
  3. AnalogKid

    Two audio outputs into one 8 ohm speaker

    Go with a cheap two-input mixer and turn down the inputs. Of course, you'll need an amplifier for the output to drive the single speaker. The nice thing about a cheap mixer is that the input level controls probably are immediately after the input connectors, rather than after some input...
  4. AnalogKid

    DVD Recorder - drive failing

    Panasonic DMR-EZ48V My long-serving DVD / VCR recorder is failing. When the DVD drive loads disk, the head searches 4 times at one speed, then one more time at a slower speed, then it stops and puts up an error message to check the disk. Same for all disks, commercial DVDs, discs recorded on...
  5. AnalogKid

    Sony Beta Alignment Tape

    If by "variations" you mean the listing of the test signals, which ones are confusing? Color Bars: https://en.wikipedia.org/wiki/SMPTE_color_bars Multiburst: https://en.wikipedia.org/wiki/Multiburst In video terms, a Monoscope is a multi-purpose test signal. It usually combines color bars...
  6. AnalogKid

    LED traffic light power question

    Don't know why there are *two* axial components per LED, but it looks like there is current limiting per LED built into the board. Dan you give us the component values? The numbers work out to around 6 mA per LED. That seems low to me, even for a high-reliability device. Also, that...
  7. AnalogKid

    Electronic device/solution idea

    Those pitfalls apply to this thread also. ak
  8. AnalogKid

    Asking about c005 time chip

    Please post the datasheet as an attachment, or a link. ak
  9. AnalogKid

    Dual-Output (Step-Up/Step-Down) DC-DC Converter via Shared Inductor Loop

    Why are you using p-channel FETs? I see only one output. Why is C1 connected to the positive supply rather than GND. Both are zero-ohm voltage sources. Please post the gate drive waveform, with voltages. ak
  10. AnalogKid

    Found problem in Kenwood KR-V95R

    Thread died 6 years ago. Don't hold your breath . . . ak
  11. AnalogKid

    Loop parasitic

    Way too small of an image. Those serpentines are there because the speed of light is not infinite. For improved noise immunity, very high frequency signals often are routed as a differential pair of traces instead of a single trace. It is critically important that the two traces be of equal...
  12. AnalogKid

    Loop parasitic

    Do you really expect an answer to that? Take a moment, step back, look at what you wrote, and ask yourself this: Does anyone else in the world know shat that means? ak
  13. AnalogKid

    Power factor

    https://en.wikipedia.org/wiki/Power_factor Elapsed time: 5 seconds. ak
  14. AnalogKid

    high voltage electrolytica capacitor vs oil filled

    In function bar across the top of the edit window, the TT dropdown lets you adjust the font size. On another forum I scale all of my posts up to 15. ak
  15. AnalogKid

    high voltage electrolytica capacitor vs oil filled

    Nope, not me. ak Please turn off your CapsLock and Bold.
  16. AnalogKid

    high voltage electrolytica capacitor vs oil filled

    Are you asking about p/n 813058, item #7 on pages 36 and 37? ak
  17. AnalogKid

    high voltage electrolytica capacitor vs oil filled

    Manufacturer's logo / date code / other markings - ? Photo of what you have or what you're trying to replace? ak
  18. AnalogKid

    Book Reviews

    This is a looooong thread. Has anyone posted a link to an old Allied Electronics catalog? Hopefully before they were bought by Radio Shack? Thanks. ak
  19. AnalogKid

    Impedances...

    A normal, typical speaker being used as a microphone has a - low impedance output and requires - nope, there is no requirement. The signal from a speaker can be treated as either a voltage or a current, and can be amplified with either a high or low input impedance amplifier circuit. However...
  20. AnalogKid

    Old board schematics

    Yeah, but I didn't see an actual answer in the thread, and he's still around. ak
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