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Calculator for audio output transformers

Audio output transformers are heavily used in a vacuum tube and some (older) transistor base audio power amplifiers, but these days output transformer are quite hard to find and expensive item. For homebrew projects, the best option is to construct those transformers by ourselves and this script helps to calculate winding parameters for those transformers.

This "AF output transformer calculator" script is written using Python and it works with most of the commonly available Python interpreters. The script is available to download at google drive under the terms of GNU General Public License version 3.0.

Homebrewed 25k: 4 output transformer

Once supplied the input parameters this script provides a winding ratio, the number of turns required for primary and secondary winding and required copper wire gauges for both primary and secondary windings, etc.

We construct several AF output transformers based on results of this script, which including transformers for Mullard 7W and 10W power amplifiers, several 6N6C/6V6GT and 6L6G based power amplifiers, etc.
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Comments

Maca said…
Hi, first, congratulations for the initiative!
I´m running the script throught Python, entered primary and secondary impedance, output power, but when i enter primary supply voltage the phyton window closes. Any sugestions? tks

Values:
Prim impedance: 5000
Sec Impedance: 8
Out power: 5
Prim supply voltage: 300
March 7, 2020 at 10:57 PM
Mushahid chauhan said…
Primary imp 8000 ohms secondary imp 4, 8 and 16 ohms power 20 watts pls tell the data of af transformer
April 21, 2020 at 8:44 AM
Mushahid chauhan said…
Primary imp 8000 ohms secondary imp 4, 8 and 16 ohms power 20 watts primary volt 300 pls tell the data of af transformer
April 21, 2020 at 8:52 AM
Anonymous said…
good day
I downloaded and instaled py ver.3.8,
I downloaded the code,
I try to run it and when I get to the Voltage supply question, the editor
puff! dissapears....

what am I doing wrong?
December 22, 2020 at 12:58 PM
Pasan said…
Lovely project.
November 2, 2021 at 9:10 PM
Anonymous said…
I got this error "AttributeError: 'collections.OrderedDict' object has no attribute 'iterkeys'" ...
October 11, 2024 at 2:48 PM
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