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In Reply to: RE: BDT Preamp Schematics posted by kenev on June 12, 2008 at 07:31:23
Evangelos,
1. I did mine point to point with Gary's mods but left out the over-current section
2. C2 is a electro 2.2uF/50V
3. C1 & C6 are 10uF & 2.2uF metallised polyester >250V, I think?
Follow Ups:
Hi jkeny,
I think we have confused it a little: I was referring to Gary's schematic and not to John's one. I see that the numbering you ae referring to correspond to John's schematic. I also noticed that I made a mistake in my previous post: there is no C6 in Gary's schematic, I had to write C5.
Anyway, I think that a 10uF/250V metallized polyester capacitor should be quite bulky. Could I use an alectro instead?
Regards,
Evangelos
The two > 250V caps are being used as noise suppressors and carry the full output voltage accross them. I think they need to be film based for their high frequency characteristics but experts may well correct this view. Yes they are bulky!
The electro, on the other hand, doesn't carry the full ouput voltage (I measured about 100V) so 100V electro should do!
Thanks for your help.
Gary also added quite helpful information in his relative page.
Regards,
Evangelos
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