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Sweet sweet vacuum tubes...

Discussion in 'General Electronics Discussion' started by riksen13, Feb 13, 2012.

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  1. riksen13


    Feb 13, 2012

    This is my first post on Electronics Point. I am fairly new to the electronics world but I am learning my way around. Next fall I will be beginning school for Electrical Engineering, and in the mean time I have been trying to soak up every bit of information I can. But to cut to the chase...

    I was playing around earlier, looking at schematic of various tube amps and preamps. I decided to try my hand at drawing up a feasible schematic of a medium mu preamp, and this is what came out.

    Does this look like something that would work? Just curious if my knowledge is leading me in the right direction. Any input on this design would be greatly appreciated!

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    Last edited: Feb 13, 2012
  2. duke37


    Jan 9, 2011
    I see no way to get current into the valve.

    This is not a voltage amplifier, it provides a low output impedance which you have killed with a 100k resistance.

    The rectifier is all wrong, you need two diodes pointing to the positive line and two diodes pointing away from the negative line. That is all diodes should be pointing up with the AC connected each side halfway up.
  3. riksen13


    Feb 13, 2012
    Well, thank you. I will now quietly crawl back into my hole until school gives me a better clue of what I am talking about.
  4. duke37


    Jan 9, 2011
    Spring is on the way in the northern hemisphere, now is the time to crawl out of our holes.

    Redraw the power supply as I suggest and when that is right, we will go from there.
  5. shrtrnd


    Jan 15, 2010
    Americans call them 'vacuum tubes'.
    Brits and Aussies call 'em 'valves'.
    Just in case you were confused about that last post.
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