[sdiy] Tube amplifier question

[René Schmitz]

Hi Motohiko, Jürgen and List,

> Yes, its heater circuit is one of most important part for this amp.
> This project's one of aim is that how we could reduce the cost of building
> tube amps in  Hi-fi sounds.
> We stop buying OPT for tube. We use small transformer for transistor as
> impedance matching. and next, we omit heater transformer. This amp cost 
> just
> under $100.

Hmm, my argument would be that a 6V 600mA transformer isn't exactly an 
expensive item. I don't know about the prices in Japan, but here the 
cost is comparable to that of a decent tube socket. And a large cap 
rated for 100V~ (or 230V here) does cost almost the same. Those couple 
hundred yen are well invested.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159