----------------------Transformers---------------------------
This is a meta-thread, made to allow you to keep track of the posts concerning this single issue - I will continue re-editing this first post.
- All should be contained in this first post - which is re-edited regularily.
- Everyone is welcome to reply with comments and pointers to things they consider relevant. This will be copy/pasted into the first post, if the meta-keeper finds it relevant. (I deeply dislike censorship, but here it seems necessary for the sake of overview)
- On a regular basis, replies will be copied to the first message and deleted, then bumped to the top.
-----
Theory-Articles and Links
Output Transformer Winding
http://www.geofex.com/article_folders/xformer_des/xformer.htm
DIY Transformer Info:
http://ludens.cl/Electron/trafos/trafos.html
An article by Brian Sowter's father on transformer core material.
http://vacuumbrain.com/The_Lab/TA/META_Transformers/core_material.pdf
A PDF on Distributed Capacitance:
www.datatronics.com/pdf/ distributed_capacitance_paper.pdf
http://sound.whsites.net/xfmr.htm
Beginners Guide To Transformers-Rod Elliot
http://www.groupdiy.com/index.php?topic=15619
Transformer articles from Audio Engineering Magazine from sodderboy
http://www.groupdiy.com/index.php?topic=13562
M6 vs M4 - and other good core steel info
Which transformers can I use where?
Lab Link
http://www.groupdiy.com/index.php?topic=162
Transformer info thread...
http://www.midcom-inc.com/pdf/TN69.pdf
70 page pdf on transformer theory and design.
http://www.ee.surrey.ac.uk/Workshop/advice/coils/power_loss.html#lams
Interesting reading on transformer theory.
http://www.groupdiy.com/index.php?topic=436
Using power transformers as output transformers
PRR's explanation of the complex trade-off's in winding audio transformers. Excellent.
http://www.groupdiy.com/index.php?topic=5513
Col McLyman book
http://d1.amobbs.com/bbs_upload782111/files_53/ourdev_725050HHOGA4.pdf
Reuben Lee book
http://www.tubebooks.org/Books/Lee_1955_Electronic_Transformers_and_Circuits.pdf
Wonderful link from Blankrazor
http://vintagewindings.com/products/TransDesign1.html
Inside Transformers
https://mysite.du.edu/~jcalvert/tech/transfor.htm
Magnetic Circuits and Transformers-MIT Electrical Engineering Staff Great Online Book!
https://babel.hathitrust.org/cgi/pt?id=uc1.b4154646;view=1up;seq=37
Glossary of Magnet Terms
QuoteModifyRemove
https://www.duramag.com/glossary/
The Magnetic Circuit - V. Karapetoff
Has Graphical Solution to Optimum Air Gap
https://babel.hathitrust.org/cgi/pt?id=mdp.39015006056918;view=1up;seq=1;size=150
Catalogs and Pinouts:
http://www.waltzingbear.com/Schematics/UTC.html
UTC Pinout Charts
http://bama.edebris.com/manuals/utc/
BeyerDynamic TX catalog
https://home.kpn.nl/chickennerdpig/FILES/BeyerDynamic_AudioInputTransformers_catalog.pdf
Catalogs
http://208.190.133.201/old_iron/
More catalogs
http://www.pmillett.com/transformer_data.htm
more catalogs
http://www.one-electron.com/FC_Trans.html
More catalogs
All kinds of goodies including transformer catalogs
http://www.audiophool.cjb.net/Techno.htm
Nice collection of catalog links:
http://www.bunkerofdoom.com/xfm/index.html
Transformer DIY
Supplies
Edcor and Heyboer sell stuff
UK Core Material from Sahib>
http://powermagnetics.co.uk/pace-magnetics.html
http://www.edson.co.uk/consumables.html
http://www.ascocomponents.co.uk/
http://www.lhcomponents.co.uk/
https://www.wiltan.co.uk/
http://powermagnetics.co.uk/pace-magnetics.html
http://www.edson.co.uk/consumables.html
http://www.ascocomponents.co.uk/
http://www.lhcomponents.co.uk/
https://www.wiltan.co.uk/
Winding Info
http://www.turneraudio.com.au/output-trans-winding.html
SE Output Design Software:
http://www.dissident-audio.com/OPT_da/Page.html
DIY Transformer winding page:
http://www.turneraudio.com.au/output-trans-winding.html
Build your own trafo, choke, ... whatever! - part supplies in Europe
http://www.groupdiy.com/index.php?topic=8616
http://www.ee.surrey.ac.uk/Workshop/advice/coils/
A very good in-depth explanation of various aspects of winding magnetics..
Tape and Insulation Thread
http://groupdiy.com/index.php?topic=57735.msg735659;topicseen#msg735715
Library
The Bible on audio transformers-Not For Beginners:
Transformers for Electronic Circuits - Second Edition,
Nathan Grossner
Transformer and inductor design handbook, 3rd ed. 15mb .pdf:
http://ebook.pldworld.com/_eBook/-Power%20Electronics-/TRANSFORMER%20and%20INDUCTOR%20DESIGN%20HANDBOOK%203rd%20Edition,%20Revised%20and%20Expanded/ourdev_725050HHOGA4.pdf
The Bible on core material
Ferromagnetism (Hardcover)
by Richard M. Bozorth
Equally Incredible:
Electronic Transformers and Circuits, 3rd Edition(Illustrated)
Ruben Lee, Charles E. Carter, Leo Wilson
Outstanding - Easier For Beginners:
Transformer and Inductor Design Handbook
Colonel Wm. T. McLyman,
Marcel Dekker, Inc., New York, 1978.
Mostly Data Tables:
Magnetic Core Selection for Transformers and Inductors (Electrical and Computer Engineering) (Hardcover)
by Colonel Wm. T. McLyman
Handbook of Modern Ferromagnetic Materials (The International Series in Engineering and Computer Science) (Hardcover)
by Alex Goldman
Handbook of transformer design and applications
William M. Flanagan
Publisher: McGraw-Hill Professional - 01 January, 1993
Format: Hardcover
List price: USD 89.95
Authoritative Book On Insulation:
Handbook of Electrical and Electronic Insulating Materials
2nd ed.
W. T. Shugg
These two are new to me.
Apparently Wolpert was an engineer at Peerless.
"Audio Transformer Design Manual", Wolpert, $36, privately published, available from: Robert G.Wolpert 5200 Irvine Blvd. #107 Irvine CA 92720
or
Title: Audio Transformer Design Manual
Author: Robert G. Wolpert
ISBN: None
Bindery: GBC
Pages: 108
Source: Angela Instruments
10830 Guilford Road
Suite 309
Annapolis Junction, MD 20701
USA
Phone: (301) 725-0451
TRANSFORMERS DESIGN AND MANUFACTURING MANUAL, by Robert Wolpert, Self Published
Rewinding transformers with CAD
Hugh Wells W6WTU Ham Radio Dec '86 p.83
Fast Optimization of Transformer Design
EDN Nov '62 by Davis, J. H
RDH4
Radio Designers Handbook
Testing Transformers
http://www.groupdiy.com/index.php?topic=14591
Testing unknown transformers
Microphone Input Transformer Characteristics
Lab Link - Pucho
http://www.groupdiy.com/index.php?topic=6571&highlight=web+info
How Many Ohms Is It?
http://www.groupdiy.com/index.php?topic=6512&highlight=utc+a21
_________________
Take - A - Parts
http://www.groupdiy.com/index.php?topic=5402
Peerless K-241-D Mic Input - Another CJ hacksaw essay..!
http://www.groupdiy.com/index.php?topic=341
100-X update.
http://www.groupdiy.com/index.php?topic=413
transformers
http://www.groupdiy.com/index.php?topic=334
Transformer DIY "1st try"
http://www.groupdiy.com/index.php?topic=310
Lundahl LL2911 in ribbon mics, thanks to Kevin Carter
http://www.groupdiy.com/index.php?topic=396
Newbie Transformer Questions............
http://www.groupdiy.com/index.php?topic=402
Peer-less S*217* D repro by Magnequest
http://www.groupdiy.com/index.php?topic=464
Are these Xformers good for anything?
http://www.groupdiy.com/index.php?topic=447
Output transformer question
http://www.groupdiy.com/index.php?topic=2982
1:2 output transformer questions
http://www.groupdiy.com/index.php?topic=2973
UTC A-10 and HA-100X Turns
http://www.groupdiy.com/index.php?topic=13562
M6 vs M4 - and other good core steel info
http://www.irt.de/IRT/publikationen/braunbuch/V72_EUE.pdf
V72 output transformer blueprints
http://www.kevinsgarage.50megs.com/output.txt
output iron specs
http://members.tripod.com/richard984/transformer_math.htm
http://www.cfd.tu-berlin.de/~panek/
http://stiftsbogtrykkeriet.dk/~mcs/Transformer.html
http://www.pulseeng.com/pdf/4022.pdf
Good reading material.
http://www.du.edu/~jcalvert/tech/transfor.htm
Beyer transformer catalouge and info at Kubi's place
www.kubarth.com/temp/bd_gb/trafokatalog.pdf
www.kubarth.com/temp/bd_gb/trafokatalog2.pdf
More good reading.
http://www.reed-electronics.com/ecnmag/article/CA421393?nid=2311
Some basics.
http://www.turneraudio.com.au/htmlwebpgs02/outputtrans.htm
Patrick Turner has some great design information here.
http://www.magnequest.com/tech.htm
This is a link to the Tech area of Magnequest Transformers.
You can ask questions about transformers in the forum.
http://www.pulseeng.com/default.aspx
Click on "Lybrary" at the top, then "White Pages."
http://www.protolam.com/page8.html
Short articls on nickel lams.
http://www.valvediy.com/ramseypg1.html
Parafeed Calculations
http://www.butlerwinding.com/core-types/index.html
Good overview on cores and other things
http://www.vacuumbrain.uk
A few odds and ends at my site...
This is a meta-thread, made to allow you to keep track of the posts concerning this single issue - I will continue re-editing this first post.
- All should be contained in this first post - which is re-edited regularily.
- Everyone is welcome to reply with comments and pointers to things they consider relevant. This will be copy/pasted into the first post, if the meta-keeper finds it relevant. (I deeply dislike censorship, but here it seems necessary for the sake of overview)
- On a regular basis, replies will be copied to the first message and deleted, then bumped to the top.
-----
Theory-Articles and Links
Output Transformer Winding
http://www.geofex.com/article_folders/xformer_des/xformer.htm
DIY Transformer Info:
http://ludens.cl/Electron/trafos/trafos.html
An article by Brian Sowter's father on transformer core material.
http://vacuumbrain.com/The_Lab/TA/META_Transformers/core_material.pdf
A PDF on Distributed Capacitance:
www.datatronics.com/pdf/ distributed_capacitance_paper.pdf
http://sound.whsites.net/xfmr.htm
Beginners Guide To Transformers-Rod Elliot
http://www.groupdiy.com/index.php?topic=15619
Transformer articles from Audio Engineering Magazine from sodderboy
http://www.groupdiy.com/index.php?topic=13562
M6 vs M4 - and other good core steel info
Which transformers can I use where?
Lab Link
http://www.groupdiy.com/index.php?topic=162
Transformer info thread...
http://www.midcom-inc.com/pdf/TN69.pdf
70 page pdf on transformer theory and design.
http://www.ee.surrey.ac.uk/Workshop/advice/coils/power_loss.html#lams
Interesting reading on transformer theory.
http://www.groupdiy.com/index.php?topic=436
Using power transformers as output transformers
PRR's explanation of the complex trade-off's in winding audio transformers. Excellent.
http://www.groupdiy.com/index.php?topic=5513
Col McLyman book
http://d1.amobbs.com/bbs_upload782111/files_53/ourdev_725050HHOGA4.pdf
Reuben Lee book
http://www.tubebooks.org/Books/Lee_1955_Electronic_Transformers_and_Circuits.pdf
Wonderful link from Blankrazor
http://vintagewindings.com/products/TransDesign1.html
Inside Transformers
https://mysite.du.edu/~jcalvert/tech/transfor.htm
Magnetic Circuits and Transformers-MIT Electrical Engineering Staff Great Online Book!
https://babel.hathitrust.org/cgi/pt?id=uc1.b4154646;view=1up;seq=37
Glossary of Magnet Terms
QuoteModifyRemove
https://www.duramag.com/glossary/
The Magnetic Circuit - V. Karapetoff
Has Graphical Solution to Optimum Air Gap
https://babel.hathitrust.org/cgi/pt?id=mdp.39015006056918;view=1up;seq=1;size=150
Catalogs and Pinouts:
http://www.waltzingbear.com/Schematics/UTC.html
UTC Pinout Charts
http://bama.edebris.com/manuals/utc/
BeyerDynamic TX catalog
https://home.kpn.nl/chickennerdpig/FILES/BeyerDynamic_AudioInputTransformers_catalog.pdf
Catalogs
http://208.190.133.201/old_iron/
More catalogs
http://www.pmillett.com/transformer_data.htm
more catalogs
http://www.one-electron.com/FC_Trans.html
More catalogs
All kinds of goodies including transformer catalogs
http://www.audiophool.cjb.net/Techno.htm
Nice collection of catalog links:
http://www.bunkerofdoom.com/xfm/index.html
Transformer DIY
Supplies
Edcor and Heyboer sell stuff
UK Core Material from Sahib>
http://powermagnetics.co.uk/pace-magnetics.html
http://www.edson.co.uk/consumables.html
http://www.ascocomponents.co.uk/
http://www.lhcomponents.co.uk/
https://www.wiltan.co.uk/
http://powermagnetics.co.uk/pace-magnetics.html
http://www.edson.co.uk/consumables.html
http://www.ascocomponents.co.uk/
http://www.lhcomponents.co.uk/
https://www.wiltan.co.uk/
Winding Info
http://www.turneraudio.com.au/output-trans-winding.html
SE Output Design Software:
http://www.dissident-audio.com/OPT_da/Page.html
DIY Transformer winding page:
http://www.turneraudio.com.au/output-trans-winding.html
Build your own trafo, choke, ... whatever! - part supplies in Europe
http://www.groupdiy.com/index.php?topic=8616
http://www.ee.surrey.ac.uk/Workshop/advice/coils/
A very good in-depth explanation of various aspects of winding magnetics..
Tape and Insulation Thread
http://groupdiy.com/index.php?topic=57735.msg735659;topicseen#msg735715
Library
The Bible on audio transformers-Not For Beginners:
Transformers for Electronic Circuits - Second Edition,
Nathan Grossner
Transformer and inductor design handbook, 3rd ed. 15mb .pdf:
http://ebook.pldworld.com/_eBook/-Power%20Electronics-/TRANSFORMER%20and%20INDUCTOR%20DESIGN%20HANDBOOK%203rd%20Edition,%20Revised%20and%20Expanded/ourdev_725050HHOGA4.pdf
The Bible on core material
Ferromagnetism (Hardcover)
by Richard M. Bozorth
Equally Incredible:
Electronic Transformers and Circuits, 3rd Edition(Illustrated)
Ruben Lee, Charles E. Carter, Leo Wilson
Outstanding - Easier For Beginners:
Transformer and Inductor Design Handbook
Colonel Wm. T. McLyman,
Marcel Dekker, Inc., New York, 1978.
Mostly Data Tables:
Magnetic Core Selection for Transformers and Inductors (Electrical and Computer Engineering) (Hardcover)
by Colonel Wm. T. McLyman
Handbook of Modern Ferromagnetic Materials (The International Series in Engineering and Computer Science) (Hardcover)
by Alex Goldman
Handbook of transformer design and applications
William M. Flanagan
Publisher: McGraw-Hill Professional - 01 January, 1993
Format: Hardcover
List price: USD 89.95
Authoritative Book On Insulation:
Handbook of Electrical and Electronic Insulating Materials
2nd ed.
W. T. Shugg
These two are new to me.
Apparently Wolpert was an engineer at Peerless.
"Audio Transformer Design Manual", Wolpert, $36, privately published, available from: Robert G.Wolpert 5200 Irvine Blvd. #107 Irvine CA 92720
or
Title: Audio Transformer Design Manual
Author: Robert G. Wolpert
ISBN: None
Bindery: GBC
Pages: 108
Source: Angela Instruments
10830 Guilford Road
Suite 309
Annapolis Junction, MD 20701
USA
Phone: (301) 725-0451
TRANSFORMERS DESIGN AND MANUFACTURING MANUAL, by Robert Wolpert, Self Published
Rewinding transformers with CAD
Hugh Wells W6WTU Ham Radio Dec '86 p.83
Fast Optimization of Transformer Design
EDN Nov '62 by Davis, J. H
RDH4
Radio Designers Handbook
Testing Transformers
http://www.groupdiy.com/index.php?topic=14591
Testing unknown transformers
Microphone Input Transformer Characteristics
Lab Link - Pucho
http://www.groupdiy.com/index.php?topic=6571&highlight=web+info
How Many Ohms Is It?
http://www.groupdiy.com/index.php?topic=6512&highlight=utc+a21
_________________
Take - A - Parts
http://www.groupdiy.com/index.php?topic=5402
Peerless K-241-D Mic Input - Another CJ hacksaw essay..!
http://www.groupdiy.com/index.php?topic=341
100-X update.
http://www.groupdiy.com/index.php?topic=413
transformers
http://www.groupdiy.com/index.php?topic=334
Transformer DIY "1st try"
http://www.groupdiy.com/index.php?topic=310
Lundahl LL2911 in ribbon mics, thanks to Kevin Carter
http://www.groupdiy.com/index.php?topic=396
Newbie Transformer Questions............
http://www.groupdiy.com/index.php?topic=402
Peer-less S*217* D repro by Magnequest
http://www.groupdiy.com/index.php?topic=464
Are these Xformers good for anything?
http://www.groupdiy.com/index.php?topic=447
Output transformer question
http://www.groupdiy.com/index.php?topic=2982
1:2 output transformer questions
http://www.groupdiy.com/index.php?topic=2973
UTC A-10 and HA-100X Turns
http://www.groupdiy.com/index.php?topic=13562
M6 vs M4 - and other good core steel info
http://www.irt.de/IRT/publikationen/braunbuch/V72_EUE.pdf
V72 output transformer blueprints
http://www.kevinsgarage.50megs.com/output.txt
output iron specs
http://members.tripod.com/richard984/transformer_math.htm
http://www.cfd.tu-berlin.de/~panek/
http://stiftsbogtrykkeriet.dk/~mcs/Transformer.html
http://www.pulseeng.com/pdf/4022.pdf
Good reading material.
http://www.du.edu/~jcalvert/tech/transfor.htm
Beyer transformer catalouge and info at Kubi's place
www.kubarth.com/temp/bd_gb/trafokatalog.pdf
www.kubarth.com/temp/bd_gb/trafokatalog2.pdf
More good reading.
http://www.reed-electronics.com/ecnmag/article/CA421393?nid=2311
Some basics.
http://www.turneraudio.com.au/htmlwebpgs02/outputtrans.htm
Patrick Turner has some great design information here.
http://www.magnequest.com/tech.htm
This is a link to the Tech area of Magnequest Transformers.
You can ask questions about transformers in the forum.
http://www.pulseeng.com/default.aspx
Click on "Lybrary" at the top, then "White Pages."
http://www.protolam.com/page8.html
Short articls on nickel lams.
http://www.valvediy.com/ramseypg1.html
Parafeed Calculations
http://www.butlerwinding.com/core-types/index.html
Good overview on cores and other things
http://www.vacuumbrain.uk
A few odds and ends at my site...
