I just published the latest version of the String Tension Workbook. This is a tool for finding out what tension your present strings are operating at, and how to choose a set of strings that will give you that performance at different tunings. There is also a string diameter calculator, where you can enter the pitch of the strings you are looking for, a target tension, and string length, and this tool will give you a good list of strings to use. The tool is located on my website at Calculators>>String Choice Tool.
My colleague in this effort, Karl Mouck, is a psaltry builder, so he added a worksheet to help choose strings for that instrument. Take a look, all you psaltry players and builders!
Let me know if you have questions about how to best use this tool. Karl and I have put a lot of work into this. I'll be putting up the final version tomorrow, but take a look tonight if you like. I'd also like to thank Terry Downs, guitar builder, for creating this workbook in the first place.
updated by @dwain-wilder: 02/19/19 10:15:20AM