Biasing a '65 Fender Bassman

The electricians are still in and out of the wood shop so I can't work out there today! We have an old Fender Bassman, which is one of our favourite amps. We've been noticing lately that it hasn't been sounding as good as usual so, it's time to replace the tubes. I thought this would be a good opportunity to show you how I bias a tube amp. This one is a bit long but, there's a lot to cover. Chapter Markers 00:00 Intro 00:15 Disclaimer (BE SAFE) 01:17 What's Going on In the Wood Shop 02:48 The Amp 04:26 Types of Bias 07:12 Grid Bias 09:01 Fixed vs Adjustable Fixed Bias 09:47 Bias Balance? 13:36 Considerations 18:16 Outside/Inside 19:13 Data Tracking Chart 21:44 Dissipation 23:36 Drain the Capacitors 25:40 What's a "Pull" 26:43 Measuring OT Resistance 28:17 OT Voltage Drop 30:06 Plate Voltage 31:36 Calculations 34:06 Bonus Biasing Method 38:39 Adjusting the Bias 42:21 Analyzing the Data 51:21 Conclusion 51:50 Outro Please like and subscribe, share the video, push that play button, and enjoy! Check out my band, One Soul Thrust,    / onesoulthrustrock  . All four of our albums are available to stream any time you like. So head on over there If you are a fan of classic '70's style rock and give us a listen! Our most recent album, "Slaves to the Sky, Masters to the Mess" -    • One Soul Thrust - Slaves to the Sky, Maste...   Our 2016 double EP set, "Hold The Vision, Trust the Process" -    • One Soul Thrust - "Hold The Vision, Trust ...   Our second album, "Know One Knows" -    • Know One Knows - The official album by the...   Our first album, "1ST", featuring a guest appearance by Glenn Hughes -    • 1ST  - The official album from the officia...   Thanks for watching! #jagenstein #jagensteining