2 x Spyder outputs happy to do _/+ 9vdc?

[petemoore]

  To get +/- Vdc using the Spyder power supply...I would tie two of the outputs together..a + and a - from each one [which leaves a -9v and a +9v to be assigned to a split power supply?
  For this hum free splitter
  http://www.geofex.com/FX_images/splitter.gif
  ...I could skip the battery switching and use a split supply as I described using a couple spyder outputs?
 

[zyxwyvu]

Yes, that should work fine, though you probably need either a center tap or a voltage divider to make a ground connection.

Take a look at the bottom of the second picture here:

http://www.geofex.com/Article_Folders/Spyder/spyder.htm

It says that outputs can be used for +/-9V, and stacked for 18V or +9/-9V (with a center tap)

[Processaurus]

I think pete meant he would take the + from one DC output, and the (-) from another, and connect those together at circuit ground, which would leave the two remaining wires having +9 on one, and -9 on the other, which would work the way he wants.

Might be a good idea to make the -9 connection use a different jack than the regular 2.1mm (if that's what you're using, Pete), in case someone else ever uses it and is tempted to use a daisy chain to fill the two power connections (which would short out the power supply).

[petemoore]

  cool and makes sense since the coils are not connected, just curious.
  It says that outputs can be used for +/-9V, and stacked for 18V or +9/-9V (with a center tap)
  I was going to give it a day or two anyway, after reading all the transformer info I could comprehend, it makes sense to just grab any two floating coils and wire up what I need...just something about doing it the first time on the nice new iron..
  something like this
Coil tap >DB> +  Reg > +9VDC output  = V+
                     Cap
                       -
Coils tied   Ground Vbias                         = Ground   
                      +
                    Cap
Coil tap>DB> -  >reg> -9vdc output       =  V-

[grapefruit]

Pete,

From your last description it seems like you're planning on building a dual rail supply using two secondaries, 1 pos reg, 1 neg reg.
That's one way to do it, although you only need one bridge.
Considering you keep the ground of your secondaries separate, (use an insulator if the regs are bolted to the chassis) which you would be doing anyway if you're going to the trouble of separate secondary windings ---
You can just hook up the V+ of one output to GND of another output. This point will be ground. GND terminal of 1st output will be -9V. +9V Terminal of second output will be +9V.
This is commonly done with isolated bench supplies and works fine.

Cheers,
Stew.

[grapefruit]

Sorry, I should have clarified. What I described is to build 2 X +9V regulated outputs and then hook them up the way described.
The links others have posted may describe this better than I have...

Stew.