Here's how I do it:
I use this little box. It has the Jensen Tx they say was similar to one used in Ed's early load box lineout.
I use this box in two ways:
1) From the computer's audio interface (e.g. MBox) to amp for reamping.
2) From my multi-purpose load box it complete the Jose loadbox/lineout for slaving.
Jose line-out:
Jensen JE-6110-PC transformer and 250k pot. I got the Jensen used off ebay for about half the price of a new one.
Line-out side of the load box:
Left: Ralle line-out with volume control.isolate it from the extension jack.
Middle: Extension jack for the Jose line-out which will be added externally via the connector in the center.
Right: The Egnater/sah5150/RockStah line-out with volume control, with switch to
