DSS731 Cutterhead

 

GO741 Amplifiers

 

CPS741 Correction Amplifier

Documents for Ortofon GO741 cutting amplifier setup

downloads of manuals schematics and technical notes

these documents are the complete collection of what we have available for the current setup of the

Ortofon Disc Cutting Amplifier equipment for Lacquer discs and Vinyl manufacturing

You will find the following items here :

GO/GE741 Cutting Amplifier

CPS741 Control and Correction Amplifier

STL732 Treble Limiter Amplifier

DSS731 - DSS732 - DSS821 Cutterheads

plus various articles and notes together with my personal technical scribbles and measurements

 

click on the links for download - and press "backspace" to return

press "F5" sometimes to reload the page - there might be new updates coming up

please note that the filesize may be quite large sometimes especially those scanned as pictures

the quality aint always beautiful but we consider a bad copy or simple information better than none

DBTL20 Bass and Treble Limiter

For more information about me personal you might also be interested in my current website www.etec.dk

Here you may also find more information and downloads of the older Ortofon valve vintage equipment

together with some of my electronic designs hereunder also the analogue Bass and Treble limiter DBTL20.

~ written by Torben Roenne - former technical employee of Ortofon year 1976 to 1982 ~

 

GO741 Cutting Amplifiers

GO741 Cutting amplifier + GE741 Power supply:

GO741 Ortofon Cutting Amplifier - Instruction Manual - Part 1 - Fundamentals - 21111632.PDF - 33 pages 4MB

GO741 Ortofon Cutting Amplifier - Instruction Manual - Part 2 - Setting up and adjusting the equipment - 21111633.PDF - 48 pages 6MB

GO741 Ortofon Cutting Amplifier - Instruction Manual - Part 3 - Power Section and Play back - 21111634.PDF - 50 pages 6MB

GO741 Ortofon Cutting Amplifier - Leaflet - high resolution - 21111629.PDF - 6 pages 36MB

GO741 Ortofon Cutting Amplifier - Power Amplifier Schematic A0061 - 21111636.PDF - 1 page 0.15MB

GO741 Ortofon Cutting Amplifier - Power Section Schematics A0061 + A0054 - high resolution - 21111637.PDF - 7 pages 20MB

GO741 Ortofon Cutting Amplifier - Schematics only for service and repair - 21111630.PDF - 24 pages 4MB

Ortofon Cutterhead Connections for DSS661-731-732-821 - 1 sheet.PDF - 1 page 0.1MB

CPS741 Correction Amplifier

CPS741 Ortofon Correction Amplifier

CPS741 Ortofon Correction Amplifier - Manual Complete - 21111615.PDF- 43 pages 4MB

CPS741 Ortofon Correction Amplifier - Leaflet - high resolution - 21111627.PDF - 5 pages 29MB

CPS741 Ortofon Correction Amplifier - internal wiring schematic - with wire color codes - 21111624.PDF - 1 page 8MB

CPS741 Ortofon Correction Amplifier - rewiring to get rid of pre-post crosstalk - 21111625 .PDF - 3 pages 18MB

CPS741 Ortofon Correction Amplifier - internal wiring schematic - 21111616.PDF - 1 page 0.5MB

STL732 Treble Limiter

STL732 Ortofon Treble Limiter

STL732 Ortofon Treble Limiter - Instruction Manual Complete - 21111601.PDF - 24 pages 3MB

STL732 Ortofon Treble Limiter - Leaflet - high resolution - 21111628.PDF - 4 pages 22MB

STL732 Ortofon Treble Limiter - Schematic Diagram only - 21111605.PDF - 1 page 0.2MB

STL732 Ortofon Treble Limiter - Schematic Diagram only - high resolution - 21111603.PDF - 1 page 11MB

STL732 Ortofon Treble Limiter - Test Procedure - 21111604 - size 1 page 0.1MB - 5 pages 0.4MB

STL841 (732) Ortofon Treble Limiter - Instruction Manual - new model not finished - 21111600.PDF - 7 pages 0.7MB

STL841 (732) Ortofon Treble Limiter - Instruction Manual - new model not finished - 21111601.PDF - 4 pages 0.4MB

DSS731 Cutterhead

DSS731-732-821 Ortofon Cutterheads

DSS731-732-821 Ortofon Cutterheads - Instruction Manual - 21111612.PDF - 20 pages 2MB

DSS731-732-821 Ortofon Cutterheads - Leaflet - high resolution - 21111609.PDF - 4 pages 53MB

DSS731-732-821 Ortofon Cutterheads - Covering letter by repair - 21111622.PDF - 5 pages 0.4MB

DSS731-732-821 Ortofon Cutterheads - Differences and technical mesurements - 21111620.PDF - 4 pages 0.4MB

DSS731-732-821 Ortofon Cutterheads - Wiring to a Neumann Cutting Lathe for Tecnicians only - 21111614.PDF - 4 pages 1.5MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 0 - 21111600.JPG - 1 page 18MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 1 - 21111601.JPG - 1 page 11MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 2 - 21111602.JPG - 1 page 12MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 3 - 21111603.JPG - 1 page 10MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 4 - 21111604.JPG - 1 page 7MB

DSS821 Ortofon Cutterhead - Leaflet Picture - High Resolution - Page 5 - 21111605.JPG - 1 page 4MB

DL791 Ortofon Cutterhead Dummy Load - 21111635.PDF - 4 page 0.5MB

DBTL20 PC-Board

DBTL20 PC-Board

DBTL20 Bass and Treble Limiter analogue version without switching noise. High and Low frequency regulation individually. Dynamic action with signal level. Completely tranparent at low level - increasing action with increasing signal level.

DBTL20 Treble Limiter

DBTL20 frequecy response curves

DBTL20 technical data

Individual pc boards schematics

GO741 Ortofon Cutting Amplifier - Schematics - A0027 G0741 equalizer board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0051 G0741 monitor board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0054 G0741 power driver board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0055 G0741 impedanse matching board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0056 G0741 safety board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0057 G0741 meter driver board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0058-1 G0741 pick up magnetic board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0058-3 G0741 pick up dynamic board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0059 G0741 relay board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0060 G0741 feed back board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0061 G0741 power stage board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0062 G0741 monitor switch board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0084 G0741 power supply 15 volt board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0088 G0741 pick up RiAA board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0089-1 GO741 input circuit board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0089-2 G0741 input circuit half speed board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0090 G0741 half speed switch board.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - GO741 chassis back panel.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - GO741 chassis wiring.PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0082 GE741 power supply series regulator .PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0085 GE741 power supply series regulator .PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0086 GE741 power supply positive regulator .PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - A0087 GE741 power supply negative regulator .PDF - 1 page 0.1MB

GO741 Ortofon Cutting Amplifier - Schematics - GE741 power supply - chassis and transformers.PDF - 1 page 0.1MB

 

   
 
 

Mechanical drawings :

Ortofon Cutterhead Mounting piece backplate 06121600.PDF - 1 page 0.08MB

Ortofon Cutterhead Mounting piece backplate 06121600.JPG - 1 page1MB

Ortofon Cutterhead Mounting piece for Neumann Head and suction pipe 06121601.PDF - 14 pages 1MB

this set of drawings are for ataching the groove suction pipe to the cutterhead suspension.

remember to use a very soft type of hose at the other end so the cutter can move freely.

Yes this one is for the Neumann cutterhead only - but i think you propably can get the pickture of how it works.

i dont have the corresponding version for the Ortofon head - yet.

 

Remember : in order to return from document pages - use "backspace" !

and also do press "F5" now and then to update the internet page copy on your local computer.

DSS731 Cutterhead

Sorry - I still dont have the information on how to modify the Ortofon amplifiers to drive the Neumann heads

If anybody holds this kind of information we would very much like you to contribute to this site

Thank you very much in advance

 

this is the end for now

more is coming up later - whenever we find something

revision 2016-12-05 kl.16:05

Best regards from Torben Roenne

www.etec.dk

© etec.dk design