• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Antique Sound Lab MG-SPM25 Output Transformers

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PTSOUNDLAB

PTSOUNDLAB

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ptsoundlab.com
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Hello,

I think to build an Antique Sound Lab MG-SPM25 25W KT88 class A mono block amplifier with my own components (i have all components except output transformers). I have a doubt about output transformer primary value. Can somebody could help me ? I think of a standard 2,5K or 5K or 8K ? (ASL sells transformers but no corresponding)

The schematic is here http://ptsoundlab.jexiste.fr/depotimg/spm25.jpg


An other interesting amplifier is ASL AQ-1001 50W class A KT88 amplifier. If somebody know output transformer primary value, i will be please because I have some components too. http://ptsoundlab.jexiste.fr/depotimg/aq1001.jpg

Thanks experts 😉

Cordially

Pascal.
 
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