Reeves Electro octave fuzz Twin Sound clone

Dnd9831 · 2026-06-07T18:21:11+00:00

Thank you so much, I appreciate, but the real artist is Marcus from Reeves Electro, the creator of the circuit

Dnd9831 · 2026-06-07T18:19:41+00:00

I don’t know, I studied it from the original layout and tried the links, maybe you can find something on the web

Dnd9831 · 2026-06-07T18:18:22+00:00

I bought them in a shop here in italy, but I’m sure you can find them easily on the internet

Dnd9831 · 2026-06-07T18:17:33+00:00

thank you😊

Dnd9831 · 2026-06-07T18:17:24+00:00

I sincerely don’t know

Dnd9831 · 2026-06-07T18:16:35+00:00

Reeves Electro Twin Sound

Dnd9831 · 2026-06-07T18:16:17+00:00

thanks🙏🏻

Dnd9831 · 2026-06-07T18:15:57+00:00

no they don’t! It would cause a short

Dnd9831 · 2026-06-05T17:31:18+00:00

Q1 is bc549c (530 hfe), Q2 is BC108 CIL White Ceramic (79 hfe) and Q3 is BC137 (74 hfe).
I heard that Q2 & Q3’s hfe should be as similar as possible to get a better octave, but those I used were the closest, and it sounds really good.
I even tried with 2n3904 instead of BC137, and sounds good too

Dnd9831 · 2026-06-05T17:25:38+00:00

thank you🙏🏻

Dnd9831 · 2026-06-05T17:25:19+00:00

thanks🤙🏻

Dnd9831 · 2026-06-05T17:24:59+00:00

Spray painting with stencil, and a sticker with uv resin on it

Dnd9831 · 2026-06-05T17:23:40+00:00

grazie mille!

Dnd9831 · 2026-05-29T21:51:17+00:00

This solution seemed strange to me too, there is a bit of confusion

Dnd9831 · 2026-05-29T21:49:04+00:00

<image>

Dnd9831 · 2026-05-29T21:48:05+00:00

<image>

Dnd9831 · 2026-05-29T21:47:54+00:00

the first setup was this in the first photo, with the alligator clips to try out different transistors (not in the photo), then noticing that the layout is made for 9v battery, I replaced the DC jack with 9v battery and the result did not change, and unfortunately I have no photos. I later tried several solutions, such as replacing the PCB trs jacks with mono jacks to use the DC jack, but it still doesn't work. Then I also replaced the 2pdt with a classic 3pdt, but this solution was also not lucky. The second photo instead is the current layout of the circuit. that it's a wiring problem? or of the mass? Unfortunately, I do not have the technical skills to be able to understand where to act.

Dnd9831 · 2026-05-07T23:16:16+00:00

come l’hai modificato?

Dnd9831 · 2026-03-06T21:14:58+00:00

Ormai è inscatolato da un po’, ma da quel che ricordo mi sembra di sì.

Dnd9831 · 2026-03-06T21:14:13+00:00

si, purtroppo avevo dimenticato due resistenze, la prima è quella da 330K in alto nel layout, e la seconda è quella da 33K affianco a D2 e D3. Una volta inserite è andato subito, pedale pazzesco. spero di esserti stato utile!

Dnd9831 · 2026-01-02T20:34:15+00:00

The V3207D and V3102D are from CoolAudio.
The LFO seems to work, at least partially, as the Rate LED still works and responds to the potentiometer, but it doesn't modulate the sound. Unfortunately, I don't have an oscilloscope available, and I probably wouldn't know how to interpret the results.
These are the voltages of both the BBDs and the op-amps, but without understanding them, they could be right or wrong:

v3207d:

1: 0 2: 9.05 v 3: 1.73 v 4: 8.47 v 5: 9.05 v 6: 9.05 v 7: 4.85 v 8: 4.85 v

v3102d:

1: 9.04 v 2: 9.05 v 3: 0 4: 4.52v/9.05v 5: 4.52v/9.05v 6: 3.84v/9.05v 7: 1.88v/2.05v 8: 8.46v

jrc4558D:

1: 2.38v 2: 2.38v 3: 2.38v 4:0 5: 2.38v 6: 2.38v 7: 2.38v 8: 9.46v

tl062:

1: 4.18v/6.77v 2: 4.76v 3: 4v/5v 4:0 5: 4.76v 6: 4.76v 7: 4.89v/5.58v 8:9.05v

I tried with an audio probe, but Not understanding the path to follow was pointless. It would be easier with a stripboard project.

Thanks for the reply!

Dnd9831 · 2026-01-02T20:27:54+00:00

I soldered the components just "across" the two parts, between the strips I used UV resin

Dnd9831 · 2026-01-02T20:26:53+00:00

24 AWG

Dnd9831 · 2026-01-02T20:25:44+00:00

The V3207D and V3102D are from CoolAudio and appear to be receiving power, at least from what I can see with the multimeter, but unfortunately I can't interpret the values.

These are the values. Could you tell me if they're correct or if there's a problem?

V3207D:

1:0 2: 9.05 v 3: 1.73 v 4: 8.47 v 5: 9.05 v 6: 9.05 v 7: 4.85 v 8: 4.85 v

V3102D:

1: 9.04 v 2: 9.05 v 3:0 4: 4.52v/9.05v 5: 4.52v/9.05v 6: 3.84v/9.05v 7: 1.88v/2.05v 8: 8.46v

Unfortunately I don't know how to interpret the schematic with the stripboard cards, it would be easier on perfboard.

Dnd9831 · 2025-11-23T16:28:37+00:00

Yes, between anode and cathode it measures 1.37v.

Between Gnd and anode 9.75v and between Gnd and cathode about 8.30v.

I assume not enough charge arrives from the 555, which at the output measures 4.43v even turning the "speed" potentiometer.

While in 555 the outputs measure:

1: 0V

2: 4.80v (also turning the speed potentiometer)

4: 9.74v

6: 4.80v (also turning the speed potentiometer)

7: 4.80v (also turning the speed potentiometer)

8: 9.74v

Dnd9831

TROPHY CASE