[sdiy] Two more questions

[Chris Crosskey]

THe old Elektor Formant bypassed-723 is a good design for stability adn
accuracy, but it isn't cheap to build. I do them using photo-etch
techniques....+/-15V and +5V at around an amp a rail.....modifying kits to
take it to 3A per rail (bigger bypass transistors, huge heatsinks and very
small control resistors)
You've opened one of our favourite cans of worms here BTW, along with
connector type, transistor matching and panel size/format....

chrisc
chrisc

> -----Original Message-----
> From: Steve Begin [mailto:Steve.Begin at pwgsc.gc.ca]
> Sent: 06 August 2002 15:51
> To: Synth (E-mail)
> Subject: [sdiy] Two more questions
> 
> 
> I've got a couple more questions :)
> 
> First, I'm having trouble finding a schematic for either a 15 
> volt bipolar power supply, and/or a +5 volt, does anybody 
> know of a good design they could point me towards?  
> 
> My other question is; when you are finished a design and are 
> putting it on a pcb, do you use vero, etching, or 
> photo-etching? (sorry if those aren't the proper names).
> 
> I made a circuit a long time ago from an old magazine, I used 
> a permanent marker on copper and then etched it, but I don't 
> have a steady hand and it was sloppy, some parts were thin, 
> some were thick, etc.  The etching where you use light 
> sensitive chemicals seems to be way too much work but maybe 
> it's easier than it sounds.  I've also seen rub-on decals 
> which I'm guessing are used instead of a marker.  
> 
> Vero board looks like it could get sloppy in inexperienced hands.
> 
> So I'm just wondering, is this a matter of preference, or is 
> there really only one good way to do it?  
> 
> 
> > Steve Begin
> > 
> > 
> > 
> 

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