Sunday, 14 February 2010

Keeley Katana Boost

UPDATE (09-02-2012):
Without the chargepump and so requires an 18V supply.  The schematic that the earlier layout was created from has been shown to be incorrect.  In the scheme the switchable 10u cap was linked to the source of Q2, this in fact needs to link to the source of Q1.  Apologies to anyone who has made this up, but it is a quick fix, just unsolder the cable and re-solder it into it's new home as per the updated layout below:

Here is a simple vero chargepump layout if you need a 9 to 18V converter:


  1. Hi,

    I've built this and I cant get it to work (I also think that the 10uF capacitor on the switch should be the other way around)

    Do you know where I can find a schematic?

    Thanks for the layout, nice site!


  2. Hi! In the schematic, the two power outputs (18v) should go to the unique connection in the vero chargepump layout (17.5V ish)? I don't understand very well the power connection... Thank you.

  3. Yes it needs an 18V supply at both those points (you can just link them together and then you only need to connect the charge pump to one of them). You would feed those connections with the 17.5V (ish) wire.

    On the charge pump layout, the 9V is voltage in, 17.5V is voltage out after the converter has done it's thing.

    1. Ok, it's clear! Thank you so much.