Enclosure not stated · 1 knob
Keeley Katana BoostVerified
Based on the Keeley Katana· 11 other boards clone it
From the post
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:
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 11 rows
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Check before you build · 2 values the reader of this layout was not sure of
- Blue off-board switch carrying the 10uF and 15nF caps, right of the board: type not printed, four lugs drawn, entered as SPDT
- Pot is printed only '250K LIN' with no knob name; entered as Volume
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 3 | ||||
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 680R | 680 | read from the layout by eye | |
| ×2 | 4K7 | 4.7k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×3 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 100p | 100p | read from the layout by eye | |
| ×1 | 15nF | 15n | on the switch; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic, on the switch; read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | 2N5458 | 2N5458 | JFET; read from the layout by eye | |
| Potentiometers 1 | ||||
| Volume | B250K | B250k | Potentiometer | knob not named in the drawing; read from the layout by eye |
| Switches 1 | ||||
| ×1 | SPDT | SPDT | type not given; selects 10uF / 15nF; read from the layout by eye | |
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