Just to head off the interpretation problem on rig tuning...
There are different model Loos gauges. I believe the numbers Bengt refers to use the Loos Model B gauge. The standard wire size used for J/30 standing rigging is 1/4" diameter. There are conversion charts for settings between different Loos gauge models and absolute tension in PSI at the following links:
Loos & Co. How to use Tension Gauges Download
PDF document with conversion charts between Loos Gauges
[This message has been edited by Rhapsody #348 (edited 10-10-2008).]