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  1. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Make sure your black meter lead is in good contact with the equipment chassis - you might need to scrape it across to break through some corrosion or coating.
  2. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Power on (of course). It won't read anything if there's nothing there to read! You could test the meter by measuring any battery you have lying around.
  3. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Turn the meter to the V range (20V) which is at about 3 o'clock on the dial. Might need the 200V range if the meter 'over-ranges' i.e. the measured voltage is greater than 20V. Negative lead (black) on the chassis, red lead touching points TP1 to TP5 respectively.
  4. kellys_eye

    Clarification of terms S:N

    The fat bald one or the short noisy one?
  5. kellys_eye

    Need an expert ardiuno coder with circuit designing skills for my projects at penny's cost

    I'll do it for 10,000,000,000 pennies.
  6. kellys_eye

    Class B Viking B-2 Transformer Schematic

    The transformer is a 'typical' example of primary over-winding. Given the wide range of global AC mains standards - anywhere from 110V to 250V (possibly wider) - the manufacturers have additional taps added to the main winding which allows the user to select the correct (or nearest possible)...
  7. kellys_eye

    Superimposing Low Frequency Dither over High Frequency PWM

    My understanding of it.... Apply the PWM to one input of a (N)AND gate along with a random, low frequency gate signal to the other input and you get your 'dithered' signal. The amplitude is fixed, the frequency 'may' be fixed but the pulse widths can, and do, vary. It can also be done in...
  8. kellys_eye

    Airwick Freshmatic Max unit

    Depends on how you want it to operate. You can throw in a cheap digital timer module and set whatever time/date on it you want. All you need is a set of closing contacts to get power to the mechanism (I believe it's a rotating operation?). But getting it to remain battery-powered and low...
  9. kellys_eye

    Please help me... FM Bug transmitter

    <holds hands up> It wasn't ME folks! Well, not THIS time anyway......:D:p
  10. kellys_eye

    Clarification of terms S:N

    Gourmet dinner maybe - I mean, I like to read them!
  11. kellys_eye

    Name of this connector please?

    except in this example I don't think this is the case. Let's see the other side of the connector as it likely has polarisation tabs on it (or the connector itself has a none-rectangular shape) and there are a gazillion like it - it's just a bit of a minefield trying to find the 'exact' one...
  12. kellys_eye

    Class B Viking B-2 Transformer Schematic

    I think the 'Y (why) don't use BR-R for step up voltage' was the question........ There's no reason why you can't use BR-R to step up the voltage. Transformers are 'bi-directional' but you MUST be cautious of the absolute ratings to prevent overloading.
  13. kellys_eye

    electronics test equipment

    Try your local college - they tend to have an annual clear out of old equipment that has (usually) been well maintained but their budgets require them to purchase new equipment on a regular basis. They are more sympathetic towards 'genuine' users in need as they do find resellers plaguing them...
  14. kellys_eye

    Clarification of terms S:N

    I 'liked' your post because I laughed at the use of 'word salad' :D
  15. kellys_eye

    My old high school gym

    PA stands for 'Public Address'. The system is usually based on a high voltage audio transmission (50V or 100V) to counter resistive loss in long cables but each speaker requires a step-down transformer at the speaker itself in order to work. There's nothing special about the wiring however...
  16. kellys_eye

    Cheap linear actuators

    That's the one! I'm picturing a large red 'mushroom' button directly below the unit and a large 'pointy finger' comes down, presses the button and goes straight back up!
  17. kellys_eye

    TV Speaker advice needed

    As above - my F-in-law uses them.
  18. kellys_eye

    PUPS Problems with Uninterruptible Power Supply

    How any PC draws power is down to the designer and the facilities they feel are necessary to 'do the job'. What are your OWN requirements for a portable computer? Have you looked up the power consumption figures for the relevant modules that make up a typical PC? They are easily broken down...
  19. kellys_eye

    Cheap linear actuators

    Not really - knowing the way they construct properties in the UK this type of 'boxing in' is quite common and as @Alec_t points out, is most likely the upstairs waste route....
  20. kellys_eye

    How do I make my own musical instrument?

    There aren't many references to simulation of this particular instrument and there may be a market for such where the OP resides. Not that there hasn't been research on the subject though. Check out this submission...
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