Z_verter capacitance and inductance calculator- converts between most forms of impedance

Balancing rotating objects like motors and fans (xls spreadsheet)

Custom arc template generator for phono cartridge alignment (also prints nice strobe disks)

Custom arc template BETA for colored lines (may have some bugs!)

Skating force and anti-skate for poets and musicians- minimal math.

How to make calibrated sound level measurements using Audacity.

My setup video for the Sol turntable.

Brief results of turntable thrust plate material tests (xls spreadsheet)

Handy utility for creating photographic step tablets (xlsm spreadsheet with macros)

Info and Review of Thorens TD 295 Mk III turntable (pdf file)

Program to calculate 4-pole single op amp lopass filters (zip file UPDATED!)

How to build a capacitance bridge (pdf file)

Threads, Changegears and a bunch of other shop/lab stuff- xls spreadsheet)

Program to calculate exact 3-wire screw thread measurements (zip file)

Program to calculate gear ratios (zip file) This has been somewhat debugged since first posted, but has had minimal testing. It is memory intensive. You should have a modern computer with a couple gig of memory to run it. Be patient, it may take a minute to load when you run it.

V1.48 of A Scanning Utility for the HP8903B audio analyzer / Prologix interface only (zip file)

Silicone mold casting of new gears for the HP8640B RF signal generator

Program to calculate amount to grind off chuck jaws so parts run on center