So I recently got a Roland CH-60 for a song on ebay.

Roland Cubes are a part of my past, I used to load my Dad's Orange Cube 40 into the back of our Brown Austin Allegro on gig nights. It was the first amp I used and I'm mostly a jazzer so it's clean and I like that :)

The CH-60 also packs the Boss CE-2 chorus or very near to it, which was my Dad's favourite pedal (back when he used them). It is concerning that that I'm posting tonight.
They've hard wired a very slow deep chorus on it 3k3...

Complete Service Notes PDF (6 pages): BOSS-HC-2-SERVICE-NOTES.pdf

BOSS-HC-2-schematic.jpg

Boss HC_2 Hand Clapper.jpeg

PDF: Everyday-Electronics-1980-12 Springline Reverb.pdf

Everyday-Electronics-1980-12 Springline Reverb 01.jpg Everyday-Electronics-1980-12 Springline Reverb 02.jpg Everyday-Electronics-1980-12 Springline Reverb 03.jpg Everyday-Electronics-1980-12 Springline Reverb 04.jpg Everyday-Electronics-1980-12 Springline Reverb 05.jpg

PDF: Practical-Electronics-1978-04-OCR-Page-0029.pdf

Practical-Electronics-1978-04-OCR-Page-0029.jpg

PDF: Le HAUT-PARLEUR 15 Mai 1976.pdf

Le HAUT-PARLEUR 15 Mai 1976 01.jpg Le HAUT-PARLEUR 15 Mai 1976 02.jpg Le HAUT-PARLEUR 15 Mai 1976 03.jpg Le HAUT-PARLEUR 15 Mai 1976 04.jpg Le HAUT-PARLEUR 15 Mai 1976 05.jpg Le HAUT-PARLEUR 15 Mai 1976 06.jpg

Everyday-Electronics-1975-10 Tremolo.pdf

Everyday-Electronics-1975-10 Tremolo 01.jpg Everyday-Electronics-1975-10 Tremolo 02.jpg Everyday-Electronics-1975-10 Tremolo 03.jpg Everyday-Electronics-1975-10 Tremolo 04.jpg

Everyday-Electronics-1975-03 Fuzzbox Terrell.pdf

Everyday-Electronics-1975-03 Fuzzbox Terrell 01.jpg Everyday-Electronics-1975-03 Fuzzbox Terrell 02.jpg Everyday-Electronics-1975-03 Fuzzbox Terrell 03.jpg Everyday-Electronics-1975-03 Fuzzbox Terrell 04.jpg

PDF: : RC-1969-07 Transistorized Reverberation Unit.pdf

RC-1969-07 Transistorized Reverberation Unit 01.jpg RC-1969-07 Transistorized Reverberation Unit 02.jpg RC-1969-07 Transistorized Reverberation Unit 03.jpg RC-1969-07 Transistorized Reverberation Unit 04.jpg RC-1969-07 Transistorized Reverberation Unit 05.jpg RC-1969-07 Transistorized Reverberation Unit 06.jpg RC-1969-07 Transistorized Reverberation Unit 07.jpg RC-1969-07 Transistorized Reverberation Unit 08.jpg RC-1969-07...

PDF: : HP 1971 Distortobox.pdf

HP 1971 Distortobox 01.jpg HP 1971 Distortobox 02.jpg HP 1971 Distortobox 03.jpg

PDF: Electronics-Illustrated-1967-09 Go Go Reverb.pdf

Electronics-Illustrated-1967-09 Go Go Reverb 01.jpg Electronics-Illustrated-1967-09 Go Go Reverb 02.jpg Electronics-Illustrated-1967-09 Go Go Reverb 03.jpg Electronics-Illustrated-1967-09 Go Go Reverb 04.jpg Electronics-Illustrated-1967-09 Go Go Reverb 05.jpg

PDF: Radio-Electronics-1962-09 More on Reverberation Units.pdf

Radio-Electronics-1962-09 More on Reverberation Units 01.jpg Radio-Electronics-1962-09 More on Reverberation Units 02.jpg Radio-Electronics-1962-09 More on Reverberation Units 03.jpg Radio-Electronics-1962-09 More on Reverberation Units 04.jpg
Radio-Electronics-1962-09 More on Reverberation Units 00.jpg

PDF: Elementary-Electronics-1970-07-08-OCR-Page-0058 Built in fuzz box.pdf

Elementary-Electronics-1970-07-08-OCR-Page-0058 Built in fuzz box.jpg

PDF: Radio-Electronics-1957-03.pdf

See also the earlier version of this article: Richard H. Dorf, 'The Universal Vibrato,' in: Radio News, April 1954 🇺🇸

Radio-Electronics-1957-03 Vibrato 01.jpg Radio-Electronics-1957-03 Vibrato 02.jpg Radio-Electronics-1957-03 Vibrato 03.jpg

PDF: Radio-Electronics-1968-02 Tremolo.pdf

Radio-Electronics-1968-02 Tremolo 01.jpg Radio-Electronics-1968-02 Tremolo 02.jpg

PDF: Radio Electronics 1970 02 Jaques Reverb.pdf

Radio Electronics 1970 02 Jaques Reverb 01.jpg Radio Electronics 1970 02 Jaques Reverb 02.jpg

PDF: Practical-Electronics-1972-03 Tremolo Russell.pdf

Practical-Electronics-1972-03 Tremolo Russell 01.jpg Practical-Electronics-1972-03 Tremolo Russell 02.jpg

Hands-On-1987-11-OCR-Page-0084.png

Hands-On-1987-11-OCR-Page-0084.jpg
Hands-On-1987-11-OCR-Page-0085.jpg

Hi, my big box EHX frequency analyzer EH 5000 box / EC 9000 pcb suddenly quit working, I only get the pure tone generator sound on output, Blend ctrl. and tone switch do not work anymore. Switching tone switch ON cuts down output signal completely. The pedal is modded to FX On Status LED and EXP pedal Output, using the Direct Out with a stereo jack, wired parallel to the Shift ctrl. It used to work fine during a long time after the mods. So I need some help to fix that great pedal.
Thanks for...

Full article in PDF: Elementary Electronics March April 1980 Big Boost.pdf

Elementary Electronics March April 1980 Big Boost 01.jpg Elementary Electronics March April 1980 Big Boost 02.jpg

Full article in PDF: Maplin-Electronics-1994-10 Psychedelic Wah Wah.pdf

Maplin-Electronics-1994-10 Psychedelic Wah Wah 02.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 03.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 04.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 05.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 06.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 07.jpg Maplin-Electronics-1994-10 Psychedelic Wah Wah 08.jpg Maplin-Electronics-1994-10 Psychedelic Wah...

A few Russian circuits some may be interested in. Not the clearest scans but the circuits are readable/usable.

Original Source and English parts equivalents within.

Russian Circuits 1983 (FSB).pdf

Full article in PDF: Practical-Electronics-1967-12 Spring Line Reverb.pdf

Practical-Electronics-1967-12 Spring Line Reverb 01.jpg Practical-Electronics-1967-12 Spring Line Reverb 02.jpg Practical-Electronics-1967-12 Spring Line Reverb 03.jpg Practical-Electronics-1967-12 Spring Line Reverb 04.jpg Practical-Electronics-1967-12 Spring Line Reverb 05.jpg Practical-Electronics-1967-12 Spring Line Reverb 06.jpg Practical-Electronics-1967-12 Spring Line Reverb 07.jpg

I found schematics in my archives with layouts and almost all with sound samples from the Bluetone amplifiers.
I searched for the files on the internet to link them, but could not find them anymore. Interesting stuff that should not be lost, so here are the files.

bluetone_plexi_lead_schematics.pdf
03_bluetone_plexi_lead_with_vvr.mp3
02_bluetone_plexi_lead.mp3
bluetone_melissa_schematics.pdf
No sound file
bluetone_liverpool_schematics.pdf
06_bluetone_liverpool.mp3...

Electronics-1965-01-01-OCR-Page-0066.pdf

Electronics-1965-01-01-OCR-Page-0066.jpg

I'm not sure whether showing banjo players ways of amplifying their 'instrument' is really making the world a better place, but at least the cover is worthwhile. Also waiting to get banned on facebook by American puritans for publishing nudity...

PDF: Sistema Pratico 1969_12 Electronic Banjo.pdf

Sistema Pratico 1969_12 Electronic Banjo 01.jpg Sistema Pratico 1969_12 Electronic Banjo 02.jpg Sistema Pratico 1969_12 Electronic Banjo.jpg Sistema Pratico 1969_12 Electronic Banjo 04.jpg...