Anyone wound SE transformer for 6c33c-b? - diyAudio
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Old 29th April 2005, 11:14 PM   #1
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Default Anyone wound SE transformer for 6c33c-b?

I would like to wind an O/P Tx for a SE, 6c33c-b, but havent much of a clue how to go about it.

Have any guys done this, what size of Tx did you use, and probably the most hard question is how many turns per winding/interleaves/air-gaps did you use?

I should be able to source transformer components, frames stampings, wire etc, in most common VA sizes and I recon I could set up the lathe to do the winding.

Any help much appreciated!--I would love to ditch the power Tx Im using at the moment and replace it with something more appropriate!

Thanks!
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Old 30th April 2005, 07:21 PM   #2
Yvesm is offline Yvesm  France
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Default My two pence

If I were you ...
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File Type: gif 6c33.gif (46.9 KB, 1712 views)
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Old 30th April 2005, 10:00 PM   #3
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Default Interesting program!

Where would I find a download of this calculator?--How much does it cost?
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Old 1st May 2005, 12:19 AM   #4
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Default Re: Interesting program!

Quote:
Originally posted by Alastair E
Where would I find a download of this calculator?--How much does it cost?
It's free, thanks to Yves

http://geek.scorpiorising.ca/yves.html
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Old 1st May 2005, 06:21 AM   #5
Yvesm is offline Yvesm  France
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Default New version available

Somewhat improved maths at Hi freq and lighter (MS jet engine no longer used)

http://perso.wanadoo.fr/yves.monmagnon/OPT_da-211.zip

Have fun !

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Old 1st May 2005, 07:06 AM   #6
Yvesm is offline Yvesm  France
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Default Your project file

... is here:

http://perso.wanadoo.fr/yves.monmagn...stair-6C33.mox

Yves.
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Old 1st May 2005, 01:32 PM   #7
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Default Thanks!

Very good of you to go to the trouble of both supplying the link to your calculator download AND go to the trouble of setting up the projet for me.

Currently Im using a mains Tx, and using neg-feedback to compensate for its lack of bass response, but this is a pretty poor way of doing things!--Sounds good though, so long as you dont over drive it!
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Old 1st May 2005, 02:50 PM   #8
Yvesm is offline Yvesm  France
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Hi Alastair !

No trouble indeed.
I would be so glad if that helps you to acheive a good performing Tx !

Yves.
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Old 1st May 2005, 03:56 PM   #9
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Default operating point

If I was to follow your excellent layout for the Tx, would the fact Im using 310v +B and cathode bias with around 190mA on the 6c33 affect the results?

(or can you suggest a more favourable conditions for this tube?)

In your example, the Rp is set to 150 ohm, O/P imp is (I think) 6.6 ohm

Ive been looking at 600 as primary imp, with Rp at 80 ohm--Or maybe Im just missing something important!
Thanks again!
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Old 1st May 2005, 08:32 PM   #10
Yvesm is offline Yvesm  France
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Default Re Operating point

So, I was a bit pessimistic.
At 600 Ohms and with 190mA, the Tx could be slightly smaller.
However, it will work as is.
But, is the cost an issue ?

I fear that the suggested size of the laminations not be an "Imperial Standard" and perhaps not easily available.
If so, let me know as precise as possible mecanical data for the iron and for the bobin.

If you installed the program, we could share the "project" files.

Yves.
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