In Reply to: As usual in audio, you lift one veil to find...... posted by darkmoebius on April 9, 2004 at 22:07:25:
thanks darkmobieus for the post in which ralph is quoted as saying;
From Ralph Powers' on website:::::I've always subscribed to the "less is more" and the "keep it simple stupid (KISS)" school of audio design. Luckily both of these prerequisites came together beautifully in a schematic that was given to me by a serious audio experimenter, Gary Dahl. This circuit is exceedingly simple and pure, with no capacitors or resistors in the signal path. And it requires only a hand full of parts to build. I knew the first time I laid my eyes on this schematic that I HAD to build this amplifier.::::
allow me to extend kudos to gary dahl!!!! good job gary....
Just one note... though we strive for simplicity... and on first blush I too am or want to be a church member of the KISS congregation...
but least we never forget.... capacitances and resistances are a natural part of the electronic universe.... L's, C's, and R's...
what's hidden in the schematic (by hidden I mean not shown schematicaly) is dozens and dozens of capacitors... capacitances from turn to turn, from layer to layer, from each end of each layer to the core (ground), from primary to secondary, and etc.... the 'capacitances' are small in value.... but they are there none-the-less in any transformer...
as well as resistance.... most simply is the resistance of the copper windings.... this is a resistance.... then add in the resistances (losses) of the magnetic core...
so, even where we don't have any obvious R's and C's.... they are there... just not shown unless you see a schematic of the transformer with all of the details shown....
point I want to make is that capacitance and resistance can be as "pure" or "impure" as inductances... it's what can we do with L's, C's, and R's that counts.... and each used well can produce wonderful results....
and each of these three building blocks can and do have their own gremlins...
but.... point taken and admired that Gary's circuit has what looks to bee a fair amount of woo...
cheers,msl
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Follow Ups
- Re: As usual in audio, you lift one veil to find...... - MQracing 22:50:51 04/09/04 (1)
- Re: As usual in audio, you lift one veil to find...... - gdahl 23:03:09 04/09/04 (0)