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
1

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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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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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S. Chisolm, Electronic Guitar 6V6 Amplifier, Practical Electronics, February 1965

Last post by modman « 11 Oct 2021, 09:00

by modman » 11 Oct 2021, 09:00

Rating: 0.9%

Complete PDF for this project
Guitar: Practical-Electronics-1965-01 electronic guitar part 1.pdf
Amplifier: Practical-Electronics-1965-02 Electronic Guitar Part 2.pdf

Practical-Electronics-1965-02 Electronic Guitar Part 2 01.jpg Practical-Electronics-1965-02 Electronic Guitar Part 2 02.jpg Practical-Electronics-1965-02 Electronic Guitar Part 2 03.jpg Practical-Electronics-1965-02 Electronic Guitar Part 2 04.jpg Practical-Electronics-1965-02 Electronic Guitar Part 2 05.jpg

0 Replies

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Last post modman
11 Oct 2021, 09:00
Bobby Rocket, Bright Fuzz, in: Practical Electronics, May 1987 🇬🇧

Last post by Manfred « 10 Oct 2021, 11:15
Replies: 6
by modman » 08 Oct 2021, 15:46

Rating: 3%

Complete article in PDF: Practical-Electronics-1987-05 Bright Fuzz.pdf

Practical-Electronics-1987-05 Bright Fuzz 01.jpg Practical-Electronics-1987-05 Bright Fuzz 02.jpg Practical-Electronics-1987-05 Bright Fuzz 03.jpg Practical-Electronics-1987-05 Bright Fuzz 04.jpg

6 Replies

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Last post Manfred
10 Oct 2021, 11:15
Power supply design using calculation and diagrams

Last post by Manfred « 07 Oct 2021, 21:26

by Manfred » 07 Oct 2021, 21:26

Rating: 1.5%

Power supply design using calculation and diagrams.
This procedure is taken from the AUDIO HANDBOOK published by National Semiconducter in 1976.
There is also a design example in the paper.
I used these procedures many times professionally before computer aided design was available.
PSU-Design-1.jpg
PSU-Design-2.jpg
PSU-Design-3.jpg
PSU-Design-4.jpg
PSU-Design-5.jpg
PSU-Design-6.jpg
PSU-Design-7.jpg
PSU-Design-8.jpg
PSU-Design-9.jpg
PSU-Design-10.jpg

PSU-Design 1-10.zip

0 Replies

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Last post Manfred
07 Oct 2021, 21:26
P.J. Goodwin, Autowah, Practical Electronics, March 1977 🇬🇧

Last post by modman « 06 Oct 2021, 11:14
Replies: 2
by modman » 01 Oct 2021, 14:45

Rating: 0.9%

Full article in PDF: Practical-Electronics-1977-03 Autowah.pdf

Practical-Electronics-1977-03 Autowah.jpg Practical-Electronics-1977-03 Autowah 2.jpg
Practical-Electronics-1977-03 Autowah 3.jpg

2 Replies

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Last post modman
06 Oct 2021, 11:14
Pino Castagnaro, Guitar Fuzz, in: Elettronica Flash, December 1988 🇮🇹

Last post by Manfred « 02 Oct 2021, 02:27
Replies: 1
by modman » 27 Sep 2021, 13:18

Rating: 1.1%

Elettronica-Flash-1988-12 FUZZ 1.jpg Elettronica-Flash-1988-12 FUZZ 2 copy.jpg Elettronica-Flash-1988-12 FUZZ 2.jpg

1 Replies

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Last post Manfred
02 Oct 2021, 02:27
F. Cancarini, Fuzz Box Mellow é Waa Waa, in: Sperimentare, summer 1978 🇮🇹

Last post by modman « 18 Sep 2021, 23:05

by modman » 18 Sep 2021, 23:05

Rating: 1.1%

Full project PDF: Sperimentare-1978-07-08 Fuzz Wah.pdf

Sperimentare-1978-07-08 Fuzz Wah 02.jpg Sperimentare-1978-07-08 Fuzz Wah 03.jpg Sperimentare-1978-07-08 Fuzz Wah 04.jpg Sperimentare-1978-07-08 Fuzz Wah 05.jpg Sperimentare-1978-07-08 Fuzz Wah 06.jpg

0 Replies

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Last post modman
18 Sep 2021, 23:05
Rock Heat Fuzz, in: Amaterske Radio, October 2004 🇨🇿

Last post by modman « 15 Sep 2021, 20:34

by modman » 15 Sep 2021, 20:34

Rating: 1.1%

Full article in PDF: Amaterske Radio 2004-10 Rocky heat Fuzz.pdf

Amaterske Radio 2004-10 Rocky heat Fuzz 01.jpg Amaterske Radio 2004-10 Rocky heat Fuzz 02.jpg

Fuzzes are generally distortions that produce a series of higher harmonics to the fundamental frequency. Often they are supplemented by other correction circuits.

Description
The circuit diagram of the rocky head fuzz is shown in Fig. 1. An isolating capacitor and a RF interference filter R1, C1 and C2 are connected behind the...

0 Replies

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Last post modman
15 Sep 2021, 20:34
Bernard Dalstein, Pédale d'echo, in: LED, March 1993 🇫🇷

Last post by modman « 14 Sep 2021, 20:41

by modman » 14 Sep 2021, 20:41

Rating: 0.4%

Full article in PDF: LED106_03-1993 Pedale Analog Echo.pdf

LED106_03-1993 Pedale Analog Echo 1.jpg LED106_03-1993 Pedale Analog Echo 2.jpg LED106_03-1993 Pedale Analog Echo 3.jpg LED106_03-1993 Pedale Analog Echo 4.jpg LED106_03-1993 Pedale Analog Echo 5.jpg LED106_03-1993 Pedale Analog Echo 7.jpg LED106_03-1993 Pedale Analog Echo 8.jpg LED106_03-1993 Pedale Analog Echo 9.jpg LED106_03-1993 Pedale Analog Echo 10.jpg LED106_03-1993 Pedale Analog Echo 11.jpg LED106_03-1993 Pedale Analog...

0 Replies

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Last post modman
14 Sep 2021, 20:41
A. Russell, Fuzz Box, in: Practical Electronics - May 1972 🇬🇧

Last post by Manfred « 02 Sep 2021, 21:06
Replies: 18
by Pinstripedclips » 03 Dec 2011, 21:24

Rating: 2.2%

This post was edited to re-attach the scans by the admin
Full article in PDF: Practical-Electronics-1972-05 Fuzz Box Russell.pdf

Practical-Electronics-1972-05 Fuzz Box Russell 01.jpg Practical-Electronics-1972-05 Fuzz Box Russell 02.jpg

18 Replies

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Last post Manfred
02 Sep 2021, 21:06
A. Russell, Treble Booster, Practical Electronics April 1972 🇬🇧

Last post by modman « 01 Sep 2021, 16:32

by modman » 01 Sep 2021, 16:32

Rating: 0.6%

Full PDF: Practical-Electronics-1972-04 Russell Treble Booster.pdf

Practical-Electronics-1972-04 Russell Treble Booster 01.jpg Practical-Electronics-1972-04 Russell Treble Booster 02.jpg

0 Replies

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Last post modman
01 Sep 2021, 16:32
Mullard Publishing, Circuits for Audio Amplifiers, 1959 🇬🇧

Last post by modman « 01 Sep 2021, 16:27

by modman » 01 Sep 2021, 16:27

Rating: 1.1%

Full book in PDF: Mullard-Circuits-for-Audio-Amplifiers.pdf

Mullard-Circuits-for-Audio-Amplifiers cover.jpg Mullard-Circuits-for-Audio-Amplifiers contents.jpg

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Last post modman
01 Sep 2021, 16:27
P. Bailey, Channel Selector, Practical Electronics, June 1984 🇬🇧

Last post by modman « 31 Aug 2021, 14:30

by modman » 31 Aug 2021, 14:30

Rating: 0.4%

Full PDF: Everyday-Electronics-1984-06 Channel Selector.pdf

Everyday-Electronics-1984-06 Channel Selector 01.jpg Everyday-Electronics-1984-06 Channel Selector 02.jpg Everyday-Electronics-1984-06 Channel Selector 03.jpg Everyday-Electronics-1984-06 Channel Selector 04.jpg

0 Replies

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Last post modman
31 Aug 2021, 14:30
E.M. Lyndsell, Autophase and Autowah, in: Everyday Electronics, June-July 1980

Last post by modman « 31 Aug 2021, 14:12

by modman » 31 Aug 2021, 14:12

Rating: 0.9%

Full PDF article: Everyday-Electronics-1980-06-07 Autowah Autophase.pdf

Everyday-Electronics-1980-06-07 Autowah Autophase 00.jpg Everyday-Electronics-1980-06-07 Autowah Autophase 01.jpg Everyday-Electronics-1980-06-07 Autowah Autophase 03.jpg Everyday-Electronics-1980-06-07 Autowah Autophase 04.jpg Everyday-Electronics-1980-06-07 Autowah Autophase 05.jpg Everyday-Electronics-1980-06-07 Autowah 01.jpg Everyday-Electronics-1980-06-07 Autowah 02.jpg Everyday-Electronics-1980-06-07 Autowah...

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Last post modman
31 Aug 2021, 14:12
Steve Daniels, U-Pick It, in: Elementary Electronics, May 1971 🇺🇸

Last post by lapsteelman « 17 Aug 2021, 04:03
Replies: 3
by modman » 18 Jul 2021, 14:00

Rating: 1.5%

I've already encountered the name in the earlier, equally puzzling Guitar Tripler project . But really, is this the guy who later started Small Bear Electronics?

Full article in PDF: Elementary-Electronics-1971-05-06 U Pick It.pdf

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Elementary-Electronics-1971-05-06 U Pick It.jpg Elementary-Electronics-1971-05-06 U Pick It 02.jpg Elementary-Electronics-1971-05-06 U Pick It 03.jpg

3 Replies

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Last post lapsteelman
17 Aug 2021, 04:03
M.P.R. Hamer, Variable Waa Operation / Autowah, Practical Electronics, July 1969 🇬🇧

Last post by modman « 13 Aug 2021, 15:02

by modman » 13 Aug 2021, 15:02

Rating: 1.1%

After publishing the weird article about the Harmonaphone, I googled the name of the designer and found a family website. Part of the website is written by Malcolm P. Hamer and details some of his guitar effect inventions , among which this automatic wah circuit. He writes:

AUTOMATIC WAA-WAA OPERATION

The wah-wah pedal (sometimes spelled waa-waa) was created by Brad Plunkett at Warwick Electronics Inc. in November 1966. A patent for the pedal was filed on 24 February 1967 and, that same...

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Last post modman
13 Aug 2021, 15:02
A. Scragg, Active Tone Control, in: Practical Electronics, September 1983 🇬🇧

Last post by modman « 13 Aug 2021, 14:02

by modman » 13 Aug 2021, 14:02

Rating: 0.4%

Full article in PDF: Practical-Electronics-1983-09 Active Tone Controls.pdf
Practical-Electronics-1983-09 Active Tone Controls 01.jpg Practical-Electronics-1983-09 Active Tone Controls 02.jpg Practical-Electronics-1983-09 Active Tone Controls 03.jpg

0 Replies

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Last post modman
13 Aug 2021, 14:02
R. Aspen Pittman, Tubes: Mechanics & Mystique, in: Guitar Player Magazine, June 1983 🇺🇸

Last post by modman « 13 Aug 2021, 00:33

by modman » 13 Aug 2021, 00:33

Rating: 0.4%

aspen-duotonic-620x420.jpg
An audio equipment designer, consultant, and long-time guitarist, 34-year-old R. Aspen Pittman is the president of Groove Tubes , which supplies tube sets based on the philosophy that matching their functional characteristics optimizes an amp's performance. He was the sales manager at Los Angeles' Guitar Center for four years, director of marketing and artist relations for Acoustic for seven years, and through his firm, Aspen & Associates, he has served as equipment...

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Last post modman
13 Aug 2021, 00:33
Oscillateur de vibrato pour amplificateur de guitare électrique, Haut-Parleur, August 1964 🇫🇷

Last post by modman « 12 Aug 2021, 23:43

by modman » 12 Aug 2021, 23:43

Rating: 0.2%

PDF: Le Haut Parleur N°1078 aout 1964 Vibrato.pdf

Le Haut Parleur N°1078 aout 1964 Vibrato 01.jpg Le Haut Parleur N°1078 aout 1964 Vibrato 02.jpg

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Last post modman
12 Aug 2021, 23:43
F.C. Judd, Spring Line Reverberation Unit, Practical Electronics, August 1969 🇬🇧

Last post by modman « 12 Aug 2021, 21:50

by modman » 12 Aug 2021, 21:50

Rating: 0.4%

Full article in PDF: Practical-Electronics-1969-08 Spring Reverberation Unit.pdf

Practical-Electronics-1969-08 Spring Reverberation Unit 01.jpg Practical-Electronics-1969-08 Spring Reverberation Unit 02.jpg Practical-Electronics-1969-08 Spring Reverberation Unit 03.jpg Practical-Electronics-1969-08 Spring Reverberation Unit 04.jpg Practical-Electronics-1969-08 Spring Reverberation Unit 05.jpg Practical-Electronics-1969-08 Spring Reverberation Unit 06.jpg

0 Replies

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Last post modman
12 Aug 2021, 21:50
J.D. Rogers, Switched Tone Treble Boost, Practical Electronics, July 1979 🇬🇧

Last post by modman « 09 Aug 2021, 11:36

by modman » 09 Aug 2021, 11:36

Rating: 1.1%

Full article in PDF: Practical-Electronics-1979-07- Switched Tone Treble Boost.pdf

Practical-Electronics-1979-07- Switched Tone Treble Boost 1.jpg Practical-Electronics-1979-07- Switched Tone Treble Boost 2.jpg Practical-Electronics-1979-07- Switched Tone Treble Boost 3.jpg Practical-Electronics-1979-07- Switched Tone Treble Boost 4.jpg Practical-Electronics-1979-07- Switched Tone Treble Boost 5.jpg

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Last post modman
09 Aug 2021, 11:36
Bernard Dalstein, Jazzwah, in: Loisirs Electronique D'aujourd'hui, July 2001 🇫🇷

Last post by modman « 26 Jul 2021, 09:40

by modman » 26 Jul 2021, 09:40

Rating: 1.3%

Full article in PDF: Led 166 July-Aug 2001 - JazzWah.pdf

Led 166 July-Aug 2001 - JazzWah 1.jpg Led 166 July-Aug 2001 - JazzWah 2.jpg Led 166 July-Aug 2001 - JazzWah 3.jpg Led 166 July-Aug 2001 - JazzWah 4.jpg Led 166 July-Aug 2001 - JazzWah 5.jpg Led 166 July-Aug 2001 - JazzWah 6.jpg Led 166 July-Aug 2001 - JazzWah 7.jpg

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Last post modman
26 Jul 2021, 09:40
A New Sound for your Guitar (Attack Equalizer), ETI, April 1971 🇦🇺

Last post by modman « 24 Jul 2021, 16:38

by modman » 24 Jul 2021, 16:38

Rating: 1.5%

from Electronics Today International

Full article in PDF: ETI-1971-04 New Sound for your Guitar AUS.pdf

ETI-1971-04 New Sound for your Guitar AUS 1.jpg ETI-1971-04 New Sound for your Guitar AUS 2.jpg ETI-1971-04 New Sound for your Guitar AUS 3.jpg ETI-1971-04 New Sound for your Guitar AUS 4.jpg

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24 Jul 2021, 16:38
M.A. Sawicki & A. Kowalewski, Guitar Sound Multiprocessor, Practical Electronics 1978-9 🇬🇧

Last post by modman « 24 Jul 2021, 10:09

by modman » 24 Jul 2021, 10:09

Rating: 2.2%

Originally spread out over 3 issues of Practical Electronics (Dec 1978 - Jan 1979 - Feb 1979), this is the most extensive FX project I've ever seen in a DIY magazine: 18 pages, 4 pcb's and a suitcase like enclosure to boot...

Full project PDF: Guitar Multifx processor 1978-9 Practical Electronics.pdf

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Last post modman
24 Jul 2021, 10:09
Transistor equivalents and substitutes book 1974

Last post by Manfred « 21 Jul 2021, 06:53

by Manfred » 21 Jul 2021, 06:53

Rating: 2.6%

I think this is a helpful book to find replacement types for obsolete transistors.
14-2nd-Transistor-Equivalent-1.pdf

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Last post Manfred
21 Jul 2021, 06:53
Daniel Meyer, Miniverb, in: Poptronics, July 1967 🇺🇸

Last post by modman « 16 Jul 2021, 23:34
Replies: 2
by modman » 16 Jul 2021, 19:54

Rating: 1.5%

Full article in PDF Pop-1967-05 Miniverb.pdf

Pop-1967-05 Miniverb 01.jpg Pop-1967-05 Miniverb 02.jpg Pop-1967-05 Miniverb 03.jpg Pop-1967-05 Miniverb 04.jpg Pop-1967-05 Miniverb 05.jpg Pop-1967-05 Miniverb 06.jpg

2 Replies

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Last post modman
16 Jul 2021, 23:34

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