PT from scratch for 100 W Marshall 2555 Silver Jubilee - advices and comments ... - diyAudio
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Old 1st February 2015, 08:34 AM   #1
zavica is offline zavica  Croatia
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Default PT from scratch for 100 W Marshall 2555 Silver Jubilee - advices and comments ...

Hello,


New project on building a PT for 100W 2555 Marshall Silver Jubilee.

Please check my calculations and transformer spec's on image below.

Suggest way how to wind transformer...

Click the image to open in full size.


Excel file for calculations in attachment.
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File Type: zip Transformer_calculations.zip (6.4 KB, 4 views)

Last edited by zavica; 2nd February 2015 at 07:00 AM.
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Old 1st February 2015, 09:35 AM   #2
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If you have an older type hand drill, count the gearing turns, mine does 4 - 1, (4 turns on the chuck to 1 turn on the handle). Mount the drill in a vice on your work bench and fashion a bobbin holder for the chuck. Now you can accurately count the turns. Eg. 100 turns of the handle is 400 winds. Old school but I have used it for years.
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Old 1st February 2015, 09:57 AM   #3
zavica is offline zavica  Croatia
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Thank you JonSnell for the advice.

Actually friend of mine have coli winding machine, so that's not the problem.

I'm more interested in calculations, have i the exact values, how to set up layers of windings etc...
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