[sdiy] best ways of portable +/- supply

[Justin Owen]

-----Original Message-----
From: dan snazelle [subjectivity at hotmail.com]

> does anyone have opinions on the best way to get plus and minus rails into a portable synth/noisenaker/stompbox type project  WITHOUT using an on board transformer?

> 1.AC to DC conversion (ac wallwart plugs in and is converted with regulators and caps to a DC dual supply.  Kind of bulky due to use of large caps.

Not wanting to hijack Dan's thread but I was going to ask about this as well. I've been looking at Ray Wilson's schem: 

http://www.musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php

...but I thought there was a conversation here a long while back about some people (one person?) finding this 'hung' on start up - from memory it was something to do with where the AC cycle was when it was plugged in? I think the result was that both rails went positive?

Am I remembering that or imagining it? If it is potentially a problem is it 'likely' or is it on the same list as getting hit by a bus or being abducted by aliens (that's a pretty low priority for me BTW)?

FYI - my purposes for this are to be able to put a prototype in a box and send it to someone along with a wall wart so they can just plug it in and play with it. 

Thanks.