DISCLAIMER : PLEASE exercise extreme caution when working with electronic components. You could hurt yourself or damage your equipment, if you do not feel qualified please leave this up to the professionals! We are not responsible for any personal injury or damage to equipment or property!
You need not spend lots of money on a tube bias tester. The proper equipment can be purchased for less than $ 50.00, and used for many years. Andy Fuchs shows you how with a demo on how to bias an ODS amp. All you need is a simple digital voltmeter, a set of clip leads and a work space to perform the biasing. Takes only a few minutes, and when done properly & cautiously is a safe modification. KEEP HANDS OUT OF THE CHASSIS.