The big problem that was not addressed when I started doing this was tube data sheets. I could look at them, but the stuff made no sense to me at all.
I also did not know circuits were designed around this data and I thought it was a guessing game since I had no experience with building amps, just repairing. Replacing tubes, caps, pots, bias and a few mods.
On the forum we speak of them and even refer to specific items from the data sheets. If I would have known I would have started a thread for each item on the tube data sheet as it is that important. You cannot know what you do not know.
As you look at schematics, you will notice a lot of the same resistor values for the same tube type. This is no accident.
Since to me preamp and tone stacks were and are the most difficult to understand, I would suggest top begin there. The preamp is everything up to the Phase Inverter.
I wish we could start a thread and go over all the items on a data sheet in a specific tube, starting with a triode because it is the most simple to understand IMO. The problem is it gets very difficult to understand quickly and it is not necessary to understand all of it to build amps.
When you begin to understand, ask questions and keep asking the same one till it sinks in. I spent days trying to understand load lines and thought the guys here would get tired of my questions. Some did, but others kept helping me. One day Hot Blue Plates took the time to go over it many times in great detail. I finally understood it.
I see where one member who builds a lot of amps did not understand we mentally convert mv to ma when biasing with a 1 ohm resistor and I have a hard time flipping ohms law and lack knowledge about current. I can still build an amp tho. And I am reading and learning about current.
Why was this so important? I can now design amps of my own and when I want something to sound different I know how to do that.
What Tubenit is telling you is the straight dope.
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