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Small Signal Audio Transformer - General purpose

$5.00
Condition:
Used
Minimum Purchase:
1 unit
Maximum Purchase:
1 unit
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No idea which audio equipment this came from

Audio transformer

Rectangular format designed to fit inside a microphone - no mounting tabs

Measures: 19mm length x 19mm wide x 15mm height

Flying leads 40mm length one end and 20mm length the other - these leads are multi-strand

Markings are non-existant I'm afraid...

I removed the outer insulation (tape) to look at the construction and hopefully gleen who made this transformer - no luck

COSMETIC CONDITION:

Excellent

TESTING (limited)

DC Resistance tests

Black/Red leads - 17.5 Ohm

Blue/Yellow leads - 63.6 Ohm

As I have a few different audio transformers that I no longer need, I decided to dig out some basic test equipment to provide more detail on the transformer characteristics

Test equipment used: AWA Low Distortion Audio Oscillator G232, Leader AC Voltmeter

Input to the transformer under test was made at 100mV @ 100Hz, 1Khz & 10Khz

Using test signal @ 1Khz, I have determined the following:

Turns ratio: 1: 0.56

Impedance ratio: 1: 0.32

Frequency response (a very rough test and not graphed) was flat from 100Hz to 10Khz

It would seem that this audio transformer is fine for general audio use, nothing particularly special about it though

 

Note that these tests were not exhaustive but at least shine a little more light on the characteristics of this audio transformer

Testing performed as outlined in the description. Used item, non returnable