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Step 3Build the Effect Assembly
The effect unit was designed as a miniature pneumatic cannon.
Clippard Parts List:
1x 2-cubic-inch volume chamber (MAT-2.0)
1x 10-32 solid plug (11755)
1x 10-32 miniature quick exhaust valve (MEV-2)
2x 1/8" barbs with 10-32 threads (CT4)
1x 10-32 bulkhead fitting (15027)
1x short piece of 1/8" ID urethane hose.
1x long piece of 3/8" ID hose. (A foot of 3/8" hose holds 20 mL of stage blood. The squib can eject all the stage blood from 3 feet of hose, so the length of this hose will detemine how "juicy" your squib is.)
OPTION: Substitute 1 4CQ4 fitting (1/4" NPT to 1/8" Barb) for the 15027 (Bulkhead fitting) and one of the CT4 (10-32 to 1/8" barb) elements.
1. Screw the solid plug into one of the ports on the Volume Chamber.
2. Screw the quick exhaust valve into the other port on the volume chamber. There's only one male port on the QEV, so you can't get this wrong. (but for clarity, it's labelled "C")
3. One of the remaining ports on the QEV will be marked "E". This is the port you attach the effect tube to. Screw one of the 10-32 threaded 1/8" barbs into the port.
4. Attach a short piece of 1/4" OD urethane line to the barb.
5. Screw another 1/8" barb into the hexagon-shaped end of one of the 10-32 bulkhead fittings. Plug the barbed end of this fitting into the short piece of 1/4" OD line. You may remove the retaining nut and lock-washer from the bulkhead fitting - you don't need them.
6. Work about a foot of the 3/8" vinyl tubing onto the bulkhead fitting. It will be a tight fit. I used needle-nosed pliers to stretch the hose to fit the fitting.
7. Attach one end of your control line to the remaining port on the QEV - it will be marked "L"
8. Squash the unconnected end of the 3/8" tubing flat and tape it shut with a strong waterproof tape.
9. Pierce or cut a port near the taped end of the hose which will act as the nozzle through which the stage blood will be ejected.
Clippard Parts List:
1x 2-cubic-inch volume chamber (MAT-2.0)
1x 10-32 solid plug (11755)
1x 10-32 miniature quick exhaust valve (MEV-2)
2x 1/8" barbs with 10-32 threads (CT4)
1x 10-32 bulkhead fitting (15027)
1x short piece of 1/8" ID urethane hose.
1x long piece of 3/8" ID hose. (A foot of 3/8" hose holds 20 mL of stage blood. The squib can eject all the stage blood from 3 feet of hose, so the length of this hose will detemine how "juicy" your squib is.)
OPTION: Substitute 1 4CQ4 fitting (1/4" NPT to 1/8" Barb) for the 15027 (Bulkhead fitting) and one of the CT4 (10-32 to 1/8" barb) elements.
1. Screw the solid plug into one of the ports on the Volume Chamber.
2. Screw the quick exhaust valve into the other port on the volume chamber. There's only one male port on the QEV, so you can't get this wrong. (but for clarity, it's labelled "C")
3. One of the remaining ports on the QEV will be marked "E". This is the port you attach the effect tube to. Screw one of the 10-32 threaded 1/8" barbs into the port.
4. Attach a short piece of 1/4" OD urethane line to the barb.
5. Screw another 1/8" barb into the hexagon-shaped end of one of the 10-32 bulkhead fittings. Plug the barbed end of this fitting into the short piece of 1/4" OD line. You may remove the retaining nut and lock-washer from the bulkhead fitting - you don't need them.
6. Work about a foot of the 3/8" vinyl tubing onto the bulkhead fitting. It will be a tight fit. I used needle-nosed pliers to stretch the hose to fit the fitting.
7. Attach one end of your control line to the remaining port on the QEV - it will be marked "L"
8. Squash the unconnected end of the 3/8" tubing flat and tape it shut with a strong waterproof tape.
9. Pierce or cut a port near the taped end of the hose which will act as the nozzle through which the stage blood will be ejected.
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The miniature valves that also incorporate manual controls at that size have lower flow rates than the exhaust valve.
My other reason for using this configuration was to separate the control & the effect by a long distance, while keeping the distance from the air supply to the effect tube as short as possible.
If the effect tube was being cleared by air passing through a long tube from the switch, there would be a very different attack/decay to the effect "burst". It would start and stop less dramatically.