Zero FX User Manual

Browse online or download User Manual for Motorcycles Zero FX. Zero Loss FX loop instructions Rev 3A

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Zero Loss FX Loop installation instructions
loop Revision 3A
Read all instructions before doing anything!
Before beginning actual loop installation, you must discharge your filter caps and unplug the amp
from the wall! Your amp should be in good working order, problem free. Install loop solely at your
own risk, if you are not qualified to work around high voltage electronics, do not do so. High voltage
can be deadly, proceed at your own risk!
Packing list:
- Loop board preassembled and tested.
- 2.5’ shielded wire
- 3” heat shrink tubing large, 2”small (color may vary)
- Two 4” 22 gauge wire pieces (color/s may vary).
- 1 ground lug with hardware.
- 1 small DPDT toggle switch
- Various decoupling resistors (2 watt) 4.7K-75K
- 4.7K(4.3K), 5.6K, 8.2K(7.5K) 2 watt metal oxide resistor.
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Summary of Contents

Page 1

Zero Loss FX Loop™ installation instructions loop Revision 3A Read all instructions before doing anything! Before beginning actual loop installat

Page 2

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

Page 3

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

Page 4

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

Page 5

Appendix and Notes: Instructions for previous board revisions 1B-2B are found here: http://home.comcast.net/%7Ejbjdav26/Loop%20instructions%20Rev

Page 6

-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

Page 7

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

Page 8

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

Page 9

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

Page 10

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

Page 11 - TESTING:

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

Page 12

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

Page 13 - Appendix and Notes:

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

Page 14

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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