Tube audio transformer

[audioPT]

Hi!

I need some help on this.

I want to make my own O/P transformer to tube amp.
I've searched a lot here at the forum, at google, and some other 'portals'.
I still not have the infos I want.

So:
- Formulas;
- Windings (how to);
- Cooper diameter;
- Etc.

I know that the best is to wind p-s-p-s-p... portions in layers.

Thanks in advance for any answer.

 

[frankmalz]

Pedro,

have you seen:

http://digilander.libero.it/giunchifabrizio/index.htm

great diy site even with construction section for a bobbin winder (bobinatrice):

http://digilander.libero.it/giunchifabrizio/bobina.htm

with plans for download (Bobinatrice):

http://digilander.libero.it/giunchifabrizio/scarica.htm

Hope this is helpful,

Frank

 

[audiousername]

I have posted this before, but here goes again:

This document prepared by Craig Ryder is an excellent resource for links to almost anything to do with valves!

There are many good transformer references in there - I've copied them below:

• RG Keen, OPT Design and Winding: Located in the “Tube Guitar Amp Tech Pages” section here: http://www.geofex.com/
• Jan Rowland, Roll Your Own Power Transformers: http://members.tripod.com/~schematics/xform/xformer1.htm
• Patrick Turner, Output Transformer Design Calculations: http://www.turneraudio.com.au/htmlwebpgs02/optdesigncalcs.htm
• Transformer Basics, from Lessons in Electric Circuits: http://www.ibiblio.org/obp/electricCircuits/AC/AC_9.html
• Determining OP Transformer Impedance: http://www.geocities.com/vintage_radio/outimp.htm
• Basics of Inductors: http://www.hills2.u-net.com/electron/induct.htm
• VoltSecond and Mike Lefevre, What does the Transformer Inductance do to the Loadline of the Tube? http://www.siteswithstyle.com/voltsecond/211_Load_lines/211_LOAD_LINE.html
• Gabe Velez, Transformers: http://members.tripod.com/~gabevee/transform.html
• Michael LaFevre, Transformers and Phase Shift: http://www.magnequest.com/tech2.htm
• Color codes (MarVac Electronics): http://www.marvac.com/funpages/chokes.htm
• University of Surrey, Producing Wound Components http://www.ee.surrey.ac.uk/Workshop/advice/coils/#turn
• David Berning, An Audio Amplifier Design Philosophy: http://www.meta-gizmo.com/Tri/otlology/BERNINGS.htm
• Randall Aiken, OPT’s Explained http://www.aikenamps.com/OutputTransformers.html
• Richard Sears, Trany Math: http://richard984.tripod.com/transformer_math.htm
• Lundahl, Technical Papers from Lundahl: very short pieces from Lundahl lab: http://www.lundahl.se/papers.html
• Pete Millett, Power Transformers for Audio Equipment: http://www.pmillett.addr.com/images/ax_power.pdf
• VoltSecond, Damping Ringing in LC Circuits: http://www.siteswithstyle.com/VoltSecond/Damping_ringing_XFMRS/Damping_ringing_in_xfmrs.html
• Plitron Site:http://www.plitron.com/Pages/sitemap.htm. Link takes you to site index. Under “Publications”. A collection of articles including:
  -Secrets of Output Transformers, Menno Van de Veen
  -Measuring OPT Performance, Menno Van der Veen
  -Theory and Practice Of Widebandwidth Toroidal OPT, Menno Van der Veen
  -Modeling Power Tubes and their Interaction with OPT, Menno Van der Veen
• John Atwood (One Electron), Transformer Measurements: http://www.one-electron.com/Trans_Tests.html
• Max Robinson, Understanding the Transformer: http://www.angelfire.com/electronic/funwithtubes/Amp-Transformers.html
• Dean P Currier, A Biographical History of Induction Coils: http://radiantslab.com/quackmed/Deanbio.html
  Edcor, Transformer Tek Notes: http://www.edcorusa.com/gadgeteer/tek-notes_xformer.htm
• Toroid Corp. of Maryland Tech.Bull. #1 ( Application Notes on Rectifier Transformers) and #2 (International Line Voltages and Frequencies): http://www.toroid.com/technica.htm

 

[Yvesm]

And here is my contribution:

http://geek.scorpiorising.ca/yves.html

if you're not Windoze allergic.

Yves.

 

[Carondimonio]

Hi all,

here' s a good tutorial:
Audio Transformers

Cheers,

Bruno

 

[richwalters]

Hi all,

here' s a good tutorial:
Audio Transformers

Cheers,

Bruno

Hi there......... duff link....lauft nicht

richj

 

[Carondimonio]

Hello,

bei mir läuft es...

Does anybody else have problems with this link?

Cheers,

Bruno

 

[Tekko]

Yup me.

 

[Carondimonio]

Hi all,

ok, if anybody wants this document please PM me and I' ll send it per e-mail. It' s a rather large doc, and can' t post it here on the forum, due to size limitations of the attachments.
The link I provided links to my Yahoo briefcase, where I posted it temporarily.

Cheers,

Bruno

 

[Carondimonio]

Hi all,

you can also try
This link
and then dowload the document.

Cheers,

Bruno

Edit: looks like it doesn' t work....

 

[richwalters]

Chau Bruno....Was machts das ? Link-> es clapp's auch nicht....meine anti-virus meldet -> gülle.....<do not open>.

(basically..the link doesn't work)... rest obvious.

richj

 

[audioPT]

I have posted this before, but here goes again:

.
.
.
.
.
.
.

Thanks!

And here is my contribution:

http://geek.scorpiorising.ca/yves.html

if you're not Windoze allergic.

Yves.

COOL

Hi all,

here' s a good tutorial:
Audio Transformers

Cheers,

Bruno

The directory is disabled

 

[Carondimonio]

OK, let' s try it the hard way...

Page 1

 

[Carondimonio]

Page 2

 

[Carondimonio]

Page 3

 

[Carondimonio]

Page 4...

 

[Carondimonio]

Page 5

 

[audiousername]

Hey, stop posting. You can find the entire thing here:

http://headfonz.rutgers.edu/RDH4/CHAPTR05.PDF

It's from chapter 5 of RDH4 (page 206 onwards)

 

[Carondimonio]

LOL... Thanks for the link, I' ve lost it long ago and I had just the doc on my HD!!!

Cheers,

Bruno

 

[audioPT]

Page 5

Now you can rest...

Hey, stop posting. You can find the entire thing here:

http://headfonz.rutgers.edu/RDH4/CHAPTR05.PDF

It's from chapter 5 of RDH4 (page 206 onwards)

Thanks to both!

Regards,