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kevin gilmore

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kevin gilmore last won the day on April 26 2017

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About kevin gilmore

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    Staximus Maximus, Stax Mafia's Chief Cook and Bottle Washer

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  1. The Headcase Stax thread

    845 in a megatron configuration is what you want
  2. The Headcase Stax thread

    so the options for the new woo amp 1) plate resistors, they already said its not this 2) inductors, they already said its not this 3) center tapped inductor, you get about 6db of gain with this. 3a) push pull output transformer. all sorts of issues with gain and power with this 4) solid state current source maximum voltage gain of 6sn7 is about 20, maximum voltage gain of 300b is less than 4 somewhere there are likely to be input/interstage transformers and then you are still going to have trouble getting to a voltage gain of 500 or more if you want some feedback to reduce the distortion. the viva evidently is also low on gain, and uses and output transformer. why people produce shit like this I do not know
  3. KG Balanced Dynahi build discussion thread

    pretty sure it was posted that340.zip
  4. Amplifier porn

    That is a 30 amp nema connector.
  5. Which DIY amp

    Stax mafia boards linked to in the stax mafia boards thread i highly recommend you doing a diy-t2 as your first amplifier. More than one person has done this. If you survive you will learn a lot less dangerous is the supersymmetry dynalo with the golden reference power supply then the current feedback amp balanced or single ended with the golden reference power supply more challenging is the uber2 amp
  6. krell ksa5 klone

    i'm not sure that the burson like things are going to be good for servo opamps. from what I have seen all of these things are bipolar input and have significant input offset current. Plus they drift with temperature. A low offset jfet input slow opamp is what you want for a servo
  7. krell ksa5 klone

    on the ksa5 the servo's are in the negative feedback loop. So they can influence the sound a little bit.
  8. 2018 PCB Group Buy with TKD pots

    the circlotron boards are 900V
  9. goldenreference low voltage power supply

    same size board, up to 35mm caps, had to move the pass transistors, needs checking silicon carbide rectifiers 100mm x 109mm goldenreferencelargecap.zip
  10. 2018 PCB Group Buy with TKD pots

    that was for the alps quad pots as I remember
  11. goldenreference low voltage power supply

    The Zener voltage minus 1.4V (darlington) plus about 1 V across the control transistor specifies the minimum output voltage. The zener guarantees enough start up voltage to power up the opamp so something like 8v with a 5v reference
  12. goldenreference low voltage power supply

    The opamp needs to be able to run on what the output voltage is, and the zener plus 1.4V has to be less than the desired output voltage.
  13. Cp1117 optional part for doing controlled power up. For example tube circlotron. If you don't want it, do not populate the part.
  14. will fix the package in a minute. moved the resistor and diode to limit turn on charging current on the caps new picture and board file someone please check for errors
  15. here is the new single, a little longer same width circlotronhvpowersinglenewver3swt.zip