***NOTE Bias for the 6V6 tubes has been shown in this video as 35mA and should have been 25mA. Sorry for this error...***
With the short repaired from the last video, we see the working standby functioning, all of the tubes are loaded in for a complete observation. Everything now working as expected.
The is the magic moment where I hook up my garbage test speaker, for initial evaluation. Wow, all of the potentiometers sound like, and feel like they haven't been moved in a while, and will need some Deoxit, but the Amp itself it totally quiet.
As expected, Deoxit does the job. This brought the project to the complete voltage annotation phase. Corrections are then made to bring everything within spec.
During this time, I am monitoring the current of the output tubes so I can see what the deviation is across all four.
This is followed up by a test of the amplifier functions. Some requiring a shorting plug for lack of a foot pedal. With that its time for a chassis re-installation and a test run by the wife for correct operation.
17 июн 2018
