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Mod Wave Instructions Manual

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OUT
GUITAR
IN
Please note, there are no labels for this kit. The controls, switches and connectors have
120VAC
FAST BLO
Use these instructions to learn:
How to build a stand-alone tube reverb unit.
How to prepare shielded wire.
How to make vintage style RCA cables.
The Wave is a versatile stand-alone, tube driven spring reverb unit. It can be used in front of your guitar amp
or as a line-level, analog reverb effect for the recording studio. Two controls allow you to serve up a wide
range of wetness, from just a touch to over the top psychedelia. The "dwell" control adjusts the input signal
level driving the tank and the "reverb" control adjusts the level of output reverberations from the tank.
Features
Rack Mountable - requires 3U of rack space
Line Level RCA connections - (1) Phono In and (2) paralleled Phono Outs
Footswitch Jack - cuts signal to the reverb tank input only, allowing the last reverberations to decay fully.
(Use a standard one button latching footswitch box with a mono ¼" plug).
Reverb Switch - provides an instantaneous cut of the reverb signal before and after the tank.
The Wave (K-MOD103)
REVERB
DWELL
REVERB
SWITCH
only been labeled on this drawing to indicate their function.
PHONO
1A
GUITAR
OUT
ON
OFF
Rear Panel
PHONO
OUT (1)
IN
PHONO
OUT (2)
1
Copyright © 2014 by modkitsdiy.com
IN
POWER
ON
OFF
FOOT
SWITCH
www.modkitsdiy.com

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Summary of Contents for Mod Wave

  • Page 1 How to make vintage style RCA cables. The Wave is a versatile stand-alone, tube driven spring reverb unit. It can be used in front of your guitar amp or as a line-level, analog reverb effect for the recording studio. Two controls allow you to serve up a wide range of wetness, from just a touch to over the top psychedelia.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Safety ……..………............................3 Soldering Tips…..………............................4 Wiring Tips …...……............................5 Hardware Fastening Tip……………........................ 6 Step by Step Assembly Section 1 – Mounting of Top Components ……................6 Step 1 – File the chassis holes (p. 6) Step 5 – Mount the output transformer “TR2" (p. 8) Step 2 –...

  • Page 3: Safety

    SAFETY Tube amps operate at high voltages that have the potential to injure and kill. Please remember the following when working on this project. Only work on tube amps when you are wide awake and sober. Do not plug the amp in until you have gone through all of the instructions, checking and re-checking each step.

  • Page 4: Soldering Tips

    SOLDERING TIPS It is important to make a good solder joint at each connection point. A cold solder joint is a connection that may look connected but is actually disconnected or intermittently connected. (A cold solder joint can keep your project from working.) Follow these tips to make a good solder joint.

  • Page 5: Wiring Tips

    WIRING TIPS There are 4 different types of wire included with this kit. It's important to use the correct wire type at the right place in the instructions since each type serves a specific function. Stripping wire, tinning wire and soldering. Throughout these instructions you will be told to strip and tin numerous lengths of wire.

  • Page 6: Hardware Fastening Tip

    With the terminal strips used in this kit, you might want to connect the wires to the lower holes and components to the upper holes. (Doing this can make it easier to change components for modification). Components connected to upper terminal holes.
  • Page 7 Front Panel Rear Panel Do not file away the paint from the holes circled here. After filing away the paint from each hole, you might want to check for electrical continuity between one hole and all of the rest using a multi-meter to make sure that you didn’t miss anything and that the paint was filed away sufficiently.
  • Page 8 Phono Jack Sleeve Step 4 – Mount the tank in & out phono jacks Terminal Drawings 2 & 3 show where to mount these two phono jacks. Flat Washer Place the solder lug washer over the phono jack before inserting the jack through the 3/8"...

  • Page 9: Step 9 - Mount The Reverb Tank

    Step 9 – Mount the reverb tank Drawing 3 shows the four mounting holes for the reverb tank. The tank should be mounted on the outside of the chassis with its input and output connectors facing the front panel of the chassis. Use #10 hardware. Make sure to use the ½”...

  • Page 10: Section 3 - Mounting Of Front Components

    Step 4 – Mount the footswitch jack SLEEVE Mount the footswitch jack in the one remaining rear panel hole as shown in Drawing 4. This is the ¼” jack with only two solder lugs (tip & sleeve). SECTION 3 – Mounting of Front Components Please refer to assembly Drawing 4.

  • Page 11: Section 4 - Making Wire Connections

    SECTION 4 – Making Wire Connections Please refer to assembly Drawings 5 & 6. Review the soldering and wiring tips on pp. 4 - 6 if you haven’t already. Before you make a new connection at a particular terminal or solder lug, look at Drawing 6 and notice how many other connections will be made at that terminal.
  • Page 12 Step 5 – Connect the filaments The main idea when connecting the filament wires is to avoid transferring filament hum from the power transformer’s filament winding (green wires) to the signal path of the circuit. In order to minimize filament hum, we will be twisting wires together and routing them along the chassis surface.
  • Page 13 Strip and tin a 2" length of the blue hook-up wire and connect it from T4(4) to V4 pin 1. Solder the T4(4) connection, now. When making connections to the tube sockets, the filament wires should be low and touching the chassis surface.
  • Page 14 Step 9 – Wire the front panel components Strip and tin a 3" length of blue hook-up wire and connect the “P” terminal on the A-side of the mini- toggle switch to T6(1). Strip and tin a 3" length of blue hook-up wire and connect the output jack’s “tip” lug to the “T-on” terminal on the A-side of the mini-toggle switch.
  • Page 15 Consider adding heat shrink or corona dope to this Tip: Some people may like to add insulation over the shielded end that has area for added insulation between the shield and been cut away to prevent the possibility of having an accidental short. inner conductor.

  • Page 16: Step 11 - Connect The Remaining Tube Socket Wires

    Connect the four diodes to T2. It is very important to connect each of the diodes with the correct polarity as shown in Drawing 6. (Notice there is Symmetry symmetry with respect to the center “ground” terminal). These diodes create a full-wave bridge rectifier.
  • Page 17 Step 2 – Connect the filter caps and resistors Connect the 1K resistor from T3(6) to T3(5). Connect a 10K resistor from T3(5) to T3(3). Connect another 10K resistor from T3(3) to T3(1). 22µF 450V Connect a 22µF capacitor from T3(6) to the nearest locking lug. Make sure to connect the negative end of the filter caps to the Positive (+) Negative (-)

  • Page 18: Section 6 - Assemble And Fasten The Cover Plate

    Connect the remaining 220K resistor from V3 pin 2 to the nearest locking lug. Connect the remaining 1.5K resistor and the 1µF capacitor from V3 pin 3 to the sleeve terminal of the “Tank Out” jack. (This capacitor is not polarized so it doesn’t matter which lead is connected to ground). Connect a .1µF capacitor from T6(1) to T6(4).

  • Page 19: Section 7 - Make And Connect The Rca Cables

    SECTION 7 – Make and Connect the RCA Cables In this section we will make two vintage style RCA cables for connecting the spring reverb tank to the drive and recovery circuits. Step 1 – Make the 12" output cable Cut a 12”...

  • Page 20: Step 3 - Connect The Cables To Their Respective Phono Jacks

    Plug the detachable power cord into its receptacle on the rear panel. Note: The Wave is capable of delivering extreme levels of reverb. It is best to keep the Wave off of your speaker cabinet if you plan to play at loud volumes with the reverb controls turned up past half-way.
  • Page 21 SIDE SIDE...
  • Page 22 SIDE P-TF47609 SIDE...
  • Page 25 25µF 25V 1.5K...
  • Page 26 .1µF 630V 100K 1.0µF 1.5K .01µF 630V 25µF 25V 1.5K...
  • Page 27 P-TF47609...
  • Page 28 PARTS LIST DRAWINGS K-P103-CHASSIS W-SC-12A P-H9107 steel chassis & cover plate ¼” mono jack (tip shunt) rubber feet SHUNT SLEEVE S-W124 P-K300W P-RMOD-9AB3C1B detachable power cord chicken head knobs - white spring reverb tank 16 ¾" P-SP2-106 R-V38-10KL P-ST9-600 power cord receptacle 10kΩ...
  • Page 29 1Ω, 5W resistor 220kΩ Resistor ½ W C-MD047-630 R-Q1 R-A220K .047µF, 630V capacitor 220K .047µF 630V 5W 1Ω C-MD01-630 yellow gold .01µF, 630V capacitor 100 Ω Resistor ½ W .01µF 630V 470kΩ Resistor ½ W R-A100 R-A470K C-MD1-630 470K brown .1µF, 630V capacitor black yellow...
  • Page 30 P-TF47609 P-0501H S-HS632-38 (13) power transformer terminal strip w/ 5 terminals #6 screw, 3/8" length S-HHN632 (13) #6 hex nut P-TF47609 P-0601H02 S-HLW6 (10) terminal strip w/ 6 terminals #6 lock washer S-HS440-38 (10) P-TF22921 #4 screw, 3/8" length P-0802H audio transformer terminal strip w/ 8 terminals S-HHN440...
  • Page 31 The Wave Troubleshooting Supplement The next step after thoroughly double-checking your connections is to take voltage measurements to help locate problem areas. Please keep safety first and always remember the one hand rule. The one hand rule (pictured below): is a safety precaution for working on an amp that is plugged in or could potentially have high voltages present.
  • Page 32 Measuring AC Voltages from the Guitar Signal Once your DC voltages are in order, if your kit is still not working properly, you can measure AC voltages along the signal path to troubleshoot further. You will need a volt meter that can measure the small signal AC voltages that electric guitars put out.
  • Page 33 .1µF 630V 100K 1.0µF 1.5K .01µF 630V 25µF 25V 1.5K...
  • Page 34 Fast Blo P(B) P(A) T(1) 120VAC V2 = 12AT7 22µ 22µ 22µ T(2) 22µ 60 HZ T(1) 1Ω V3 = 12AX7 V4 = 12AX7 3.2 VAC 12AX7 12AX7 12AT7 12AX7 www.modkitsdiy.com Copyright © 2014 by modkitsdiy.com “The Wave” (K-MOD103) Schematic...

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