Zero Loss FX Loop™ installation instructions loop Revision 3A Read all instructions before doing anything! Before beginning actual loop installat
14: Route the “IN” wire as shown to top right switch lug, cut to length, solder. Repeat for “OUT” wire, solder to top left switch lug: 15: Now
TESTING: Double check your connections now. Make sure the B+ decoupling resistor is connected well to the board and turret, no stray bit of res
Again all tubes need to be in the amp, turn on amp, let it warm up in standby, set volume controls off. When warmed up, turn off standby (again to
Appendix and Notes: Instructions for previous board revisions 1B-2B are found here: http://home.comcast.net/%7Ejbjdav26/Loop%20instructions%20Rev
-Note 2: The board has a support hole to pass a wire through for longer decoupling resistor to B+ in routing. Attach wire as shown below in those ca
Please think twice about any desire to mod an original amp in any way. Ultimately up to you as the owner, but with great kits readily available li
2: Be sure to discharge filter caps, unplug amp now before proceeding! A very good idea to remove tubes now as well to avoid damaging them while
3: Drill 1/8” hole in chassis and install ground lug as shown, exact location is not critical but that‘s by V3 there, the PI tube. Hardware assembl
4: Now grab your decoupling resistor determined from the chart above, slide a piece of insulation over the resistor lead to be connected to the b
5: Now fit the loop board in place, screw in jacks to hold in place temporarily. With board in place, slip a scrap piece of insulation on the othe
7: Strip insulation from one end of the 4” pieces of wire now, to solder to the board “IN” and “OUT” holes on your board. Solder these in place fr
10: Grab your shielded wire now and cut one piece to reach from the PI input (or Master Volume lug) to the middle left switch lug. You will use th
For the other end of this wire, strip and twist inner pair of wires together the same, these wires will be soldered to the PI input (or Master Vol
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