Recent content by bigkim100

  1. bigkim100

    Cannot get this circuit to work

    Kelly, you are the King of Analogue....what do you think of the Schematic?
  2. bigkim100

    Cannot get this circuit to work

    Its on Perf, and I usually make working circuits, but hell, there is always room for error.
  3. bigkim100

    Cannot get this circuit to work

    Ok, here is a Squelch Circuit that I have built, but cannot get it to work (Illustration 1) the input toU1pins 2 and 3 seem to be backwards compared to the standard schematics, (see illustration2) but I dont know. If the schematic seems ok, them I will proceed with rebuilding it. Im mostly...
  4. bigkim100

    XR2006-Sawtooth Amplitude Control

    Thank you very much Sir, that is excellent. I wasnt certain if a Zener would add unwanted noise. YOU ARE A GOD!!
  5. bigkim100

    XR2006-Sawtooth Amplitude Control

    https://html.alldatasheet.com/html-pdf/80495/EXAR/XR-2206/855/10/XR-2206.html Is there a way to bring the amplitude down to 1-2 volts on the sawtooth output? Thanks in advance Kim
  6. bigkim100

    Schematic Question

    In the attached schematic, are the 2 electrolytic Capacitors, C12 and C13 Correct? being "back to back" polarity seems strange. Thanks in advance
  7. bigkim100

    240VDc supply

    LOL...thats a friend of mine. I have the Bc-453, BC_454, and R-25. I will probably get meore later, requiring more supplies
  8. bigkim100

    240VDc supply

    Its an ARC-5 receiver
  9. bigkim100

    240VDc supply

    Ok, I need to make a 3 individual 240v/6VDC power supplies for 3 military radios. They dont require much in the way of amperage, and dont require regulation (military stuff is VERY forgiving). So if I have 2-1000uf capacitors smoothing the 240vdc supply after a full wave rectifier, should I...
  10. bigkim100

    Short pulse output

    Naaah...in the grand scheme of things a Microprocessor would do the job, its just I know nothing about them. I did learn a lot tho, from the responses I got. At 61, Im building power supplies for 3 military receivers, and many other circuits for various other things, so you may say that my...
  11. bigkim100

    Short pulse output

    Thank you very much to everyone that has supplied an answer to this. I have read them all carefully and have decided that what I thought was a simple problem is actually quite complex (a frequent outcome of one of my questions). I think I will place this problem on the Back-Burner for now.
  12. bigkim100

    Short pulse output

    Will the 555 not still continue the pulse output if the it is triggered past the duration of its timing cycle?? You are quite correct, as per usual, Sir Thank you very much analogue kid. As per usual, your work is excellent. Can you complete the circuit for me, with a relay output (maybe a...
  13. bigkim100

    Short pulse output

    would that not just continue to charge the Capacitor the entire time the button is pressed?
  14. bigkim100

    Short pulse output

    Is it possible to have a circuit that will output a 2 second pulse no matter what duration a button is pressed? Output switching is to a relay, operating voltage is unimportant, as I will build to whatever your requirements are(eg:3,5,6,9,12vdc). Thanks in advance
  15. bigkim100

    Tube Receiver Audio Matching Transformer

    Ok, have a gnarly ARC-5 Military receiver that requires a 600 Ohm audio output. I dont understand the normal matching transformers that seem to have pinouts that are listed in voltages, rather than resistances. I think a 120vac to 6vac transformer should be 600ohms and 8 ohms...
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