Your antivirus program is probably keeping you from opening the ZIP file. Send the file to to assure yourself that it's virus-free and then disable your antivirus program.
The pipe coupling datasheet has a standard listed for the styrene, but I was unable to find it for free. However, it is listed as a withdrawn standard. That may explain why styrene couplers are now hard to find. I wonder if it like ABS, which has styrene in the name. PVC and ABS have similar loss.
The capacitance measurement procedure uses a coil, but its Q is irrelevant. Read the instructions and you'll see what they're up to.
The example coil with Q > 2000 used a single 660/46 Litz wire. Form wall should have been 4.95", but styrofoam has such low loss that it makes no difference. I ran a model with a 6.67" PVC pipe coupler, the largest size available. Q was something like 1880, which isn't all that bad. Optimum Q occurs near 9.3". The program will find that value automatically if you let it vary coil diameter.
Measuring large coils can be difficult because they couple to everything, including the Q meter enclosure and your body. See README.TXT for a simple way to overcome this problem.
Brian
