RG, a couple more questions about your hum-free ABY splitter

[m_charles]

Thanks for all your help on my last post.

1) So if I follow your ABY schem: http://www.geofex.com/FX_images/humfree2.gif
I shouldn't need to change anything, right? I only ask because I see it's a slightly older schem.

2) Is there a specific kind of LED I need to get? I see there are 2 in the schem.

3) also, the 42tmo18 are still my best bet for the transformer, right?

I'm ordering the parts from mouser today and just wanted to be sure.

Thanks again for all the help you've already given!

chuck

[petemoore]

  I'm not RG.
1) So if I follow your ABY schem: http://www.geofex.com/FX_images/humfree2.gif
I shouldn't need to change anything, right? I only ask because I see it's a slightly older schem.
  Still up there after all these builds, I think it's been discussed as built.

2) Is there a specific kind of LED I need to get? I see there are 2 in the schem.
  The poles of the DPDT switch are shown in one of the two positions, the LED's have 4k7 limiting resistors and when the circuit is completed to ground they light, power supply, limiting resistor, switch, and LED are the only components in the LED circuit, you can choose the LED and limiting resistor value to achieve brighness/current consumption desired.
3) also, the 42tmo18 are still my best bet for the transformer, right?
  You can probably find different transformers that could be directly substituted here, provided they are the same reflected impedance ratio, prehaps there's a 'cleaner-wider' transformer available?
  I'm ordering the parts from mouser today and just wanted to be sure.
Thanks again for all the help you've already given!
  Yupp, wired as shown it should work, notice the LED's components are electronically separate, yet mechanically connected [in the switch] so that the lighting of the LED follows the ABY signal switching status. both circuits share 1/2 of the dpdt, and are not connected except the common ground.

[m_charles]

thanks pete,

I didn't realize the LEDs were just for lighting! I thought they were a part of the circuit itself.

Now I feel a bit silly...

Thanks again though.

Chuck

[theundeadelvis]

One thing I found that was helpful when I built this pedal was to isolate the jacks and also install a switch to give you various grounding options. I think I used a 3 position switch with the option to have both outs grounded, just one or neither. Between those 3 options I could usually find and option that was hum free.