This shows you the differences between two versions of the page.

Link to this comparison view

255vibration [2007/05/20 20:41] (current)
Line 1: Line 1:
 +====== Model 255 Cure for Physical Vibration Hum ======
 +**From the Ten-Tec Reflector October 1, 2005**
 +For anyone who has a physical audible vibration-type hum from a Ten Tec 255 power supply, I have found a solution which works like a charm.  Running the supply from 230V/50Hz (like me) means that this problem is worse than when using 110V/60Hz.
 +I cured it by making four stand-off washers, each from four (folds) thicknesses of an old bicycle innner tube, and putting them between the transformer and its screws - it is almost totally quiet now!  The damping is huge - you could put your hand on top of the transformer and feel it very vibrate very strongly - now there is virtually nothing.
 +Vy 73
 +Steve, VK6VZ