Author Topic: ANKH schematic mistake ?  (Read 442 times)

loreluc64

  • Diode Destroyer
  • *
  • Posts: 3
    • View Profile
ANKH schematic mistake ?
« on: January 25, 2018, 10:24:34 AM »
Dear all,
i've seen the schematic posted on freestompboxes and i noticed that on ANKH is missing a capacitor (C4 on fsb schematic with value 47nf) which connect lug 2 of Gain pot to Q2 Gate.
Fortunately it correspond on ANKH board on the longest wire bridge , so just replacing the wire with a 47nF capacitor the ANKH became identical to fsb schematic.
I noticed also that on some breadboard circuit found on internet the same capacitor 47nF is used at the same time so i supposed is necessary and if omitted could compromise Q2 polarization.
See in attachment freestompboxes schematic.

Lorenzo (from Italy)
« Last Edit: January 25, 2018, 10:34:06 AM by loreluc64 »

madbean

  • Administrator
  • Electron Doctor
  • *****
  • Posts: 8416
  • Brian
    • View Profile
    • madbeanpedals
Re: ANKH schematic mistake ?
« Reply #1 on: January 25, 2018, 10:30:56 AM »
Yeah it appears I omitted that erroneously. It should still function however it may cause some noise with DC across the Gain pot. I will fix that up when I have the chance. Thanks for pointing out the mistake.
I own madbeanpedals (duh). I am part owner of Function F(X).

loreluc64

  • Diode Destroyer
  • *
  • Posts: 3
    • View Profile
Re: ANKH schematic mistake ?
« Reply #2 on: January 25, 2018, 10:33:34 AM »
thanks a lot for your very appreciated job !!


madbean

  • Administrator
  • Electron Doctor
  • *****
  • Posts: 8416
  • Brian
    • View Profile
    • madbeanpedals
Re: ANKH schematic mistake ?
« Reply #3 on: January 25, 2018, 10:48:51 AM »
It only took a few minutes so I went ahead and updated the project. The 47n cap is now on the board and the schematic and BOM were updated. I did, however, note those changes as made on 1.25.17 instead of 2018 because apparently I don't know what year we are in and I'm too lazy to re-export the images.
I own madbeanpedals (duh). I am part owner of Function F(X).