Hi I am currently working on bottleheaed headphone amp, but I am at the other side of the world, australia, shipping kills the cost in buying kit from U.S of A to the of last of A.
Therefore I could only resort in salavage parts from donation shop (slavo, vinnes), thrift shop and second electronic stores.
After study a bit more on the schematic and looking at other builders guide
https://www.headphonesty.com/2019/0...ck-headphone-amplifier-a-comprehensive-guide/
I saw that althogh their transformer secondary winding have dual 150V output but they just used 150V output for B+,and one 6.3V output for heating plate, corresponding to the scheamtic.
So I was wondering is there a Da vinci drawings trap that tricks other people no to copy their work (i.e you are suppose to have a parallel 150v winding connected) or just safely get a transformer that could provide 115v to 150v with rating of 10VA+ and another transformer for heating plate.
Also most of the transformer does have have 150v but only 115 to 120V,so how much performance degradtion will it casued if 120v is used instead.
Therefore I could only resort in salavage parts from donation shop (slavo, vinnes), thrift shop and second electronic stores.
After study a bit more on the schematic and looking at other builders guide
https://www.headphonesty.com/2019/0...ck-headphone-amplifier-a-comprehensive-guide/
I saw that althogh their transformer secondary winding have dual 150V output but they just used 150V output for B+,and one 6.3V output for heating plate, corresponding to the scheamtic.
So I was wondering is there a Da vinci drawings trap that tricks other people no to copy their work (i.e you are suppose to have a parallel 150v winding connected) or just safely get a transformer that could provide 115v to 150v with rating of 10VA+ and another transformer for heating plate.
Also most of the transformer does have have 150v but only 115 to 120V,so how much performance degradtion will it casued if 120v is used instead.
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