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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: dc to dc stepdown convertors for dh filliments? posted by Al Noakes on April 30, 2015 at 10:35:57:
VT127A have 5V 10.5A filaments , I have the transformers/chokes but the filament supply alone would weigh 25kgs per channel . This is why I'd consider a halogen supply here . It's nice to get optimum sound but sometimes nicer to have an amplifier that can be moved :)
Exactly my two points:
1) definitely can be moved: just look at the size of the filament supply that I ended up using on my RH813, getting 2 secondaries 10V 5A each as well as one 6.3V 1A secondary for the driver tubes;
2) black background, cleaner than DC - with very clean sound, it's AC after all, but without the hum, and sounds a bit cleaner than mains AC (which might be an effect of the totally black background compared with some mains hum from ordinary AC).
It's definitely worth the effort, but not really as cheap as it looks because the parts needed for the mod eventually cost just as much as the electronic transformer itself.
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- RE: dc to dc stepdown convertors for dh filliments? - Alex Kitic 16:36:42 04/30/15 (0)
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