1590B · 4 knobs
John Hollis Ultra FlangerVerified
Based on the John Hollis Ultra Flanger
From the post
Got a request for a flanger effect, and hadn't seen many layouts for the John Hollis Ultra Flanger (that didn't have tiny thin traces anyway), so I thought I'd give it a go. For the record: flangers are hard. I knew from the get go this one wouldn't fit in a 1590B, but it will fit nicely in a 1590BB. There's empty space at the top corners you can cut into to fit around the screw posts in the corners of the enclosure if you need to. Here's the schematic and here's what John had to say about the circuit:
I was originally going to develop a minimum part count version of the EH Electric Mistress. Instead I went for a something with the versatility of an MXR flanger and the extra wide sweep that the A/DA flanger was known for. It needed an extra chip to get the wide sweep but it's worth it. Current consumption is very reasonable at around 2 to 8 milliamps dependent upon clock frequency.
Update Aug. 3, 2016:
Fixed the connections from the MN3007 to CD4049. Note jumper under CD4049.
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 35 rows
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Check before you build · 2 values the reader of this layout was not sure of
- 4730 diode bottom right, beside the 470Ω: read as 1N4730 (3.9 V zener); printed without prefix
- two blue square 100K parts below the left TL072: taken as trimmers from the three-pin outline
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×1 | 10M | 10M | read from the layout by eye | |
| ×1 | 3.3M | 3.3M | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 270K | 270k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×6 | 100K | 100k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×4 | 47K | 47k | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×2 | 12K | 12k | read from the layout by eye | |
| ×6 | 10K | 10k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 22pF | 22p | read from the layout by eye | |
| ×2 | 1nF | 1n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×2 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×4 | 1N4148 | 1N4148 | read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ×1 | 1N4730 | 1N4730 / 3V9 | zener, printed 4730; read from the layout by eye | |
| ICs 4 | ||||
| ×1 | MN3007 | MN3007 | BBD; read from the layout by eye | |
| ×1 | CD4049 | CD4049 | read from the layout by eye | |
| ×1 | CD4046 | CD4046 | read from the layout by eye | |
| ×2 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Regen | A100K | A100k | Potentiometer | read from the layout by eye |
| Manual | A100K | A100k | Potentiometer | read from the layout by eye |
| Sweep | A100K | A100k | Potentiometer | read from the layout by eye |
| Rate | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×2 | 100K | 100k | read from the layout by eye | |
| Switches 1 | ||||
| Odd/Even | SPDT | SPDT | toggle; read from the layout by eye | |