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Manuals and manuscript notes for musical equipment and other devices built, owned and used by electro-acoustic musician Hugh Davies

List of notes entitled: 'DIY Instrs'

Diagram for Wheatstone Bridge circuit

Notes for Commission University of York, Synthesizer: Arts Council (CUYSAC)

Mullard LP filter: notes

Notes on Electronic Music Synthesizer

Notes on various devices including synthesizer

Schematic for studio setup

Notes on Armstrong amp

List of fuses

Mullard LP filter: calculations, circuit diagrams

Mullard LP filter: calculations, table and circuit diagram

Brief notes on TV valves

Brief notes on black and white Ferguson TV specifications

Schematic for 4-channel photocell-divider

Notes: Imitation Maihak Filter

Notes on various filters, including Mullard, Moog and Maihak filters

Notes: comparing filters

Notes for Commission University of York, Synthesizer: Arts Council (CUYSAC)

Parts list

Letter from Hugh Davies to David Reynolds

Notes on Chiltmead oscillator

Schematics for 4-channel switching unit, Photocell mixer, and 1 unidentified device

Notes on Hewlett-Packard Audio Signal Generator model 205AG

Mullard LP filter: calculations and table

Electronic Music Synthesizer parts list

Notes: frequencies

Specifications for Models 1 and 2 of a 4-channel switching unit

Notes and rough schematic for capacitor testing unit

Hugh Davies' bursary acceptance letter

Descriptions of photographs

Schematic for fuzz/phase pedal

Lists and schematics for Hugh Davies' studio and some of the devices

Notes on Mullard filters: controls

Notes on photographs of Hugh Davies' instruments

Parts list for octave equaliser

Budget for equipment

Parts list for Andrew Photocell Osc

Notes on parts and stockists

Notes for a light-sound sculpture

Logs for filters

Calculations, likely for Mullard filter

Mullard HP filter: notes

Miscellaneous notes

Draft letter from Hugh Davies to David Reynolds

Notes enitled: 'HD synthesizer'

Notes on Electronic Music Synthesizer

Mullard HP filter: table, basic circuit, calculations

Notes entitled 'Live EM grant'

Notes on G36 tape recorder