Davidoff Library

Free online ressources on guitars, amps, effects, guitar technique and more. Dedicated to the fond memory of its founder SPeter Davidoff.

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YERASOV schematics

Last post by GodSaveMetal « 12 Feb 2016, 21:35
Replies: 23
by modman » 14 Jan 2008, 19:28
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Rating: 1.1%

Morecowbell, thanks for those great links you posted, but if they are all avaible from one location, it's better to just post that one link. If people are interested in discussion about this or that box, that can become a separate thread.

They are all in the $59-159 price range! Anybody has more info on this brand, we're still waiting for the english version of the website..
23 Replies

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View the latest post Re: YERASOV schematics
Last post GodSaveMetal
12 Feb 2016, 21:35
NOBELS schematics

Last post by mozwell « 15 Dec 2010, 03:56
Replies: 2
by Sock Puppet » 03 Dec 2007, 18:50

For free, from their site:

S.

2 Replies

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Last post mozwell
15 Dec 2010, 03:56

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J.D. Rogers, Guitar Overdrive Unit, Practical Electronics, Aug 1976 🇺🇸

Last post by Ben N « 15 Jul 2021, 16:06
Replies: 2
by modman » 13 Jul 2021, 22:11

Rating: 1.7%

1976: no fuzz, but the earliest mention of an overdrive circuit. More advanced and earlier than a Tubescreamer!

PDF article: Practical-Electronics-1976-08 Guitar Overdrive Unit.pdf

Practical-Electronics-1976-08 Guitar Overdrive Unit 01.jpg
Practical-Electronics-1976-08 Guitar Overdrive Unit 02.jpg
Practical-Electronics-1976-08 Guitar Overdrive Unit 03.jpg
Practical-Electronics-1976-08 Guitar Overdrive Unit 04.jpg
Practical-Electronics-1976-08 Guitar Overdrive Unit 05.jpg

2 Replies

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Last post Ben N
15 Jul 2021, 16:06
R.J. Caborn, Wah-Wah Pedal Unit, in: Radio Constructor, June 1970 🇬🇧

Last post by modman « 09 Jul 2021, 13:45

by modman » 09 Jul 2021, 13:45

Rating: 0.9%

Full article in PDF: RC-1970-06 Wah Wah Pedal Unit.pdf

RC-1970-06-OCR-Page-0001.jpg
RC-1970-06-OCR-Page-0034.jpg RC-1970-06-OCR-Page-0035.jpg RC-1970-06-OCR-Page-0036.jpg RC-1970-06-OCR-Page-0038.jpg RC-1970-06-OCR-Page-0039.jpg RC-1970-06-OCR-Page-0040.jpg

0 Replies

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Last post modman
09 Jul 2021, 13:45
R. Penfold, 'Soft Distortion Effects Unit,' in: Everyday Practical Electronics, January 1993 🇺🇸

Last post by modman « 07 Jul 2021, 10:49
Replies: 2
by modman » 14 Feb 2021, 22:06

Rating: 1.5%

everyday-practical-electronics-1993-01-OCR-Page-0040.jpg
everyday-practical-electronics-1993-01-OCR-Page-0041.jpg everyday-practical-electronics-1993-01-OCR-Page-0042.jpg

2 Replies

1396 Views

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Last post modman
07 Jul 2021, 10:49
Peter A. Roe, Transistorised Vibrato Unit, in: Radio Constructor, April 1964 🇬🇧

Last post by modman « 07 Jul 2021, 09:41

by modman » 07 Jul 2021, 09:41

Rating: 0.9%

Full article in PDF: RC-1964-04 Transistorized Vibrato Unit.pdf

RC-1964-04 Transistorized Vibrato Unit 01.jpg RC-1964-04 Transistorized Vibrato Unit 02.jpg RC-1964-04 Transistorized Vibrato Unit 03.jpg RC-1964-04 Transistorized Vibrato Unit 04.jpg RC-1964-04 Transistorized Vibrato Unit 05.jpg RC-1964-04 Transistorized Vibrato Unit 07.jpg RC-1964-04 Transistorized Vibrato Unit 08.jpg RC-1964-04 Transistorized Vibrato Unit 09.jpg

0 Replies

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Last post modman
07 Jul 2021, 09:41
D.S. Gibbs & I.M. Shaw, Smooth Fuzz, in: Practical Electronics, Sept. 1979 🇬🇧

Last post by modman « 06 Jul 2021, 13:28

by modman » 06 Jul 2021, 13:28

Rating: 1.5%

This circuit was discussed here

Full article in PDF: Practical-Electronics-1979-09 Smooth Fuzz.pdf

Practical-Electronics-1979-09 Smooth Fuzz 01.jpg Practical-Electronics-1979-09 Smooth Fuzz 02.jpg Practical-Electronics-1979-09 Smooth Fuzz 03.jpg

0 Replies

1055 Views

View the latest post D.S. Gibbs & I.M. Shaw, …
Last post modman
06 Jul 2021, 13:28
G.T. Ryan, Sustain unit for guitar amplifiers, Electronics Australia, Sept 1975 🇦🇺

Last post by modman « 04 Jul 2021, 12:00

by modman » 04 Jul 2021, 12:00

Rating: 1.5%

PDF: EA 1975-09 September_sustain unit.pdf

EA 1975-09 September_sustain unit 01.jpg EA 1975-09 September_sustain unit 02.jpg

0 Replies

992 Views

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Last post modman
04 Jul 2021, 12:00
R. Stufka, Appetizer Fuzz, Radioelectronik September 1981 🇵🇱

Last post by modman « 01 Jul 2021, 10:34

by modman » 01 Jul 2021, 10:34

Rating: 0.9%

Appetizer Fuzz source.jpg Appetizer Fuzz Polish 1980.jpg 202988681_602818317348589_7728393892031217500_n.jpg

It turned up in the version of the computer schematic, but I was able to find the original Polish article...

0 Replies

561 Views

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Last post modman
01 Jul 2021, 10:34
Il Magnifici Quattro, Radio Elettronica, May 1974 🇮🇹

Last post by modman « 27 Jun 2021, 13:50

by modman » 27 Jun 2021, 13:50

Rating: 1.9%

Radio Elettronica 1974_05.pdf

Radio Elettronica 1974_05 Tremolo.jpg Radio Elettronica 1974_05 Distortion.jpg Radio Elettronica 1974_05 Treble Boost.jpg Radio Elettronica 1974_05 metronome.jpg

0 Replies

530 Views

View the latest post Il Magnifici Quattro, Radio …
Last post modman
27 Jun 2021, 13:50
Distorsore, Radio Elettronica, May 1974 🇮🇹

Last post by modman « 27 Jun 2021, 13:45

by modman » 27 Jun 2021, 13:45

Rating: 1.3%

For the PDF: see

Radio Elettronica 1974_05 Disto 01.jpg Radio Elettronica 1974_05 Distortion.jpg Radio Elettronica 1974_05 Disto 03.jpg Radio Elettronica 1974_05 Disto 04.jpg

0 Replies

359 Views

View the latest post Distorsore, Radio Elettronic …
Last post modman
27 Jun 2021, 13:45
Forrest Mims' notebooks 🇺🇸

Last post by toneman « 25 Jun 2021, 21:15
Replies: 3
by toneman » 25 Jun 2021, 16:13

Rating: 3%

Here are old Radio Shack Forrest Mims Engineer's Notebooks

Some sample pages:
Forrest Mims-Engineer's Mini-Notebook Op Amp Ic Circuits (Radio Shack).jpg Forrest Mims - Basic Semiconductor Circuits.jpg Forrest Mims - Basic Semiconductor Circuits 02.jpg Forrest Mims - Basic Semiconductor Circuits 03.jpg

3 Replies

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Last post toneman
25 Jun 2021, 21:15
Un distorsore per chitarra, Italy 1968 🇮🇹

Last post by mozz « 18 Jun 2021, 20:48
Replies: 1
by modman » 18 Jun 2021, 14:40

Rating: 1.3%

Full article in PDF: Distorto pera chitarra 1968 italian.pdf

Distorto pera chitarra 1968 italian.jpg Distorto pera chitarra 1968 italian 02.jpg Distorto pera chitarra 1968 italian 03.jpg Distorto pera chitarra 1968 italian 04.jpg

1 Replies

602 Views

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Last post mozz
18 Jun 2021, 20:48
Mondofuzz, Electronics, February 1990 🇮🇹

Last post by modman « 15 Jun 2021, 12:56

by modman » 15 Jun 2021, 12:56

Rating: 1.1%

Full article in PDF: Il Mondofuzz feb 1990.pdf

Il Mondofuzz feb 1990 01.jpg Il Mondofuzz feb 1990 02.jpg Il Mondofuzz feb 1990 03.jpg Il Mondofuzz feb 1990 04.jpg

0 Replies

534 Views

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Last post modman
15 Jun 2021, 12:56
Bernard, Dalstein, Fuzz-Octaver, in: LED, April 1992 🇫🇷

Last post by FuzzMonkey « 13 Jun 2021, 21:16
Replies: 1
by modman » 13 Jun 2021, 17:27

Rating: 1.3%

Full article in PDF: LED. Loisirs électroniques d'aujourd'hui n° 118 avril 1994 Octaver french.pdf
FuzzOct01_april1994.jpg Octfuzz02.jpg Octfuzz03.jpg octfuzz04.jpg octfuzz05.jpg octfuzz06.jpg

1 Replies

754 Views

View the latest post Re: Bernard, Dalstein, Fuzz- …
Last post FuzzMonkey
13 Jun 2021, 21:16
Studio Tech, Ecoplate 2 (1980) 🇺🇸

Last post by deltafred « 05 Jun 2021, 17:41
Replies: 1
by modman » 05 Jun 2021, 11:34

Rating: 1.9%

Full manual with schematics: Studio Tech Ecoplate 2.pdf

Studio Tech Ecoplate 2 schem1.jpg Studio Tech Ecoplate 2 schem 2.jpg

1 Replies

454 Views

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Last post deltafred
05 Jun 2021, 17:41
Amtron 107 - Tremolo 🇮🇹

Last post by modman « 16 May 2021, 08:52

by modman » 16 May 2021, 08:52

Rating: 0.9%

Full article in PDF: Amtron UK107 - Tremolo 1973.pdf

Amtron UK107 - Tremolo 1973 01.jpg Amtron UK107 - Tremolo 1973 02.jpg Amtron UK107 - Tremolo 1973 03.jpg

0 Replies

661 Views

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Last post modman
16 May 2021, 08:52
C.H. Gardner, The Story of the Valve, December 1965 🇬🇧

Last post by ppluis0 « 07 May 2021, 03:46
Replies: 1
by modman » 05 May 2021, 12:09

Rating: 1.7%

Full four part article in PDF: The Story of the Valve - Gardner 1965.pdf

The Story of the Valve - Gardner 1965.jpg

1 Replies

613 Views

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Last post ppluis0
07 May 2021, 03:46
Robin & Lipman, Practical Amplifier Diagrams (1947) 🇺🇸

Last post by ppluis0 « 29 Apr 2021, 17:02
Replies: 2
by modman » 28 Apr 2021, 10:06

Rating: 1.5%

Full book in PDF: Robin & Lipman - Practical Amplifier Diagrams 1947.pdf

Robin & Lipman - Practical Amplifier Diagrams 1947 01.jpg Robin & Lipman - Practical Amplifier Diagrams 1947 02.jpg Robin & Lipman - Practical Amplifier Diagrams 1947 03.jpg

2 Replies

1051 Views

View the latest post Re: Robin & Lipman, Prac …
Last post ppluis0
29 Apr 2021, 17:02
Amtron UK855 - Electronic Fuzz Box , May 1971 🇮🇹

Last post by modman « 27 Apr 2021, 07:01

by modman » 27 Apr 2021, 07:01

Rating: 0.4%

Full article in PDF: Amtron UK855 - Electronic fuzz box.pdf

Amtron UK855 - Electronic fuzz box 01.jpg Amtron UK855 - Electronic fuzz box 02.jpg Amtron UK855 - Electronic fuzz box 03.jpg Amtron UK855 - Electronic fuzz box 04.jpg

0 Replies

642 Views

View the latest post Amtron UK855 - Electronic Fu …
Last post modman
27 Apr 2021, 07:01
Electric Guitar with Stereo Effect, Radio-Rama, September 1971 🇮🇹

Last post by modman « 25 Apr 2021, 09:24

by modman » 25 Apr 2021, 09:24

Rating: 0.4%

PART 1 PDF: Pieze Preamp Radiorama_9_71.pdf
PART 2 PDF: Chitarra Electrica con Stereo pt2.pdf

Pieze Preamp Radiorama_9_71 01.jpg Pieze Preamp Radiorama_9_71 02.jpg Pieze Preamp Radiorama_9_71 03.jpg Pieze Preamp Radiorama_9_71 04.jpg Pieze Preamp Radiorama_9_71 05.jpg Pieze Preamp Radiorama_9_71 06.jpg

0 Replies

619 Views

View the latest post Electric Guitar with Stereo …
Last post modman
25 Apr 2021, 09:24
Chambre d'echo, Le Haut-Parleur, April 1973 🇫🇷

Last post by modman « 21 Apr 2021, 16:09
Replies: 2
by modman » 15 Apr 2021, 07:39

Rating: 0.9%

Full article in hi-res PDF: Chambre d echo HP1401_19-04-1973.pdf

Chambre d echo HP1401_19-04-1973.jpg Chambre d echo HP1401_19-04-1973 2.jpg Chambre d echo HP1401_19-04-1973 3.jpg

2 Replies

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Last post modman
21 Apr 2021, 16:09
Etienne Lemery, Double Tremolo and Ring Modulator, in: Electronique Pratique, June 1977 🇫🇷

Last post by Manfred « 16 Apr 2021, 13:47
Replies: 1
by modman » 07 Apr 2021, 13:05

Rating: 1.5%

Complete article in French in PDF (6 pages): Double Tremolo Ring Modulator HP77_1606.pdf

Schematic and layout:

Double Tremolo Ring Modulator HP77_1606.jpg Double Tremolo Ring Modulator HP77_1606 2.jpg

1 Replies

847 Views

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Last post Manfred
16 Apr 2021, 13:47
Bob Pease troubleshooting guide PDF

Last post by ppluis0 « 10 Apr 2021, 04:34

by ppluis0 » 10 Apr 2021, 04:34

Rating: 1.3%

112 pages explaining how to deal with electronic failures, lab equipment and things like that:

Complete explanation about condensers, resistors, inductors and also active components.

Enjoy !
Josè

0 Replies

806 Views

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Last post ppluis0
10 Apr 2021, 04:34
J.J. Barbarello, 'Octaviser' in Elementary Electronics, July 1979 🇺🇸

Last post by modman « 07 Apr 2021, 09:08

by modman » 07 Apr 2021, 09:08

Rating: 0.9%

Elementary-Electronics-1979-07-08-OCR-Page-0027.jpg Elementary-Electronics-1979-07-08-OCR-Page-0028.jpg Elementary-Electronics-1979-07-08-OCR-Page-0073.jpg

0 Replies

964 Views

View the latest post J.J. Barbarello, 'Octaviser' …
Last post modman
07 Apr 2021, 09:08
Pédale de Distorsion, in: Haut-Parleur, 1967 🇫🇷

Last post by modman « 06 Apr 2021, 18:46

by modman » 06 Apr 2021, 18:46

Rating: 0.9%

Fuzz and Treble Booster
Hi-Res PDF: HP 1967 Distorsion.pdf

HP 1967 Distorsion 01.jpg HP 1967 Distorsion 02.jpg

0 Replies

976 Views

View the latest post Pédale de Distorsion, in: Ha …
Last post modman
06 Apr 2021, 18:46
Craig Anderton, Timbre Gate in: Poptronics, April 1971 🇺🇸

Last post by modman « 20 Mar 2021, 10:25

by modman » 20 Mar 2021, 10:25

Rating: 0.9%

Full article in PDF: Poptronics-1971-04 Craig Anderton Timbre Gate.pdf

Poptronics-1971-04 Craig Anderton Timbre Gate.jpg Poptronics-1971-04 Craig Anderton Timbre Gate 2.jpg Poptronics-1971-04 circuit.jpg
Poptronics-1971-04 Craig Anderton Timbre Gate 4.jpg Poptronics-1971-04 Craig Anderton Timbre Gate 5.jpg Poptronics-1971-04 Craig Anderton Timbre Gate 6.jpg Poptronics-1971-04 Craig A 7.jpg

0 Replies

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View the latest post Craig Anderton, Timbre Gate …
Last post modman
20 Mar 2021, 10:25

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