Enclosure not stated · 1 knob
Spaceman Atlas IIIVerified
Based on the Spaceman Effects Atlas III booster· 2 other boards clone it
From the post
Hope everyone's staying safe and healthy. Today's layout is a unique preamp booster from Spaceman Effects, the Atlas III. It uses some FETs I'd never heard of in conjunction with a couple low gain silicon BJTs (use something in the 175-225 hFE range). The switch controls the phase of your signal (it's internal in the original). Schematic can be found here for reference. Also, I updated the Make a Difference page on the website to include a few funds working to help in the aftermath of the Beruit explosion. It's killed well over 150 people, injured 6000 and left over 300,000 people homeless. If you can, do some good, offer some home and help out some people who are really hurting.
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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 17 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- Q2, Q3: legend gives only 'low gain NPN silicon', no part number
- 30K at the top right (row C): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×5 | 1M | 1M | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 30K | 30k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 330pF | 330p | read from the layout by eye | |
| ×1 | 1.2nF | 1.2n | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×2 | 180nF | 180n | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | LND150N3 | LND150N3 | depletion MOSFET; read from the layout by eye | |
| Q4 | LND150N3 | LND150N3 | depletion MOSFET; read from the layout by eye | |
| Q2 | low gain NPN silicon | LOW GAIN NPN SILICON | no part number given; read from the layout by eye | |
| Q3 | low gain NPN silicon | LOW GAIN NPN SILICON | no part number given; read from the layout by eye | |
| Inductors 1 | ||||
| ×2 | FB | FB | ferrite bead; read from the layout by eye | |
| Potentiometers 1 | ||||
| Boost | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Switch | SPDT | SPDT | on/on, wired to Sw1/Sw2/Sw3; read from the layout by eye | |
Other boards based on the Spaceman Effects Atlas III booster
- Glenn Dead End FX · 125B · $12.00
- Spaceman Effects Atlas III Booster Dirtbox Layouts