supercop9907
Member
Hey everyone I'm new here and the RM100m is my first tube amp. Checking the bias on the tubes seemed pretty simple and straight forward, but when I plugged my voltmeter in it read that each tube was biased at around -15mA. The manual for my voltmeter said that if there was a hyphen (-) in front of the number it meant that the polarity was reversed. Anybody know what that means? The EL34's should be around 30-35 mA correct? Any reason why they would come biased at 15 mA?
Any help would be appreciated. Thanks
Any help would be appreciated. Thanks