The whole point to the direct coupled circuit that has become the staple of Fender and Marshall amps is to take the signal off the cathode of the second triode to both lower the impedance and for LOWER NOISE....
The way the first schematic is wired makes no practical sense; if you want two gain stages in series use cap coupling and put a plate load on the second triode....
TT
Master Volume Noise
Moderators: pompeiisneaks, Colossal
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steveneddy
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Re: Master Volume Noise
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Last edited by steveneddy on Fri Mar 14, 2014 9:21 am, edited 1 time in total.
Re: Master Volume Noise
First, I am not the greatest. There are people here who have forgotten more about tubes amps than I will ever know (Gingertube, take a bow. There are many others as well).
But, since you think I am the greatest and said you will listen to me, hear this: I have a sharp tongue and can cut to the bone; I'm working on that but making little progress.
The fact that you drew up that first schematic, posted it, and then defended it as a working circuit, tells me that you have little to no knowledge of the most basic fundamentals of how a triode operates. It is evident from your posts that your heart is in the right place but your knowledge is not. You are driving while blind (ZZ Top). That is a disaster waiting to happen.
Are you still with me?
As I said, your heart seems to be in the right place. Now, you need spend some serious time learning basic electronic theory and then learn how it applies to tubes. It should have been obvious to you the second you drew up that schematic that it is impossible for that to work and the reasons why.
Painting by numbers is fine. But, as soon as you deviate from a proven schematic and layout, then you need to know the reason for what you are doing. You can't just take a piece here and a piece there and hook stuff up and hope for the best. It might work--for a while.
A good place to start would be the "Reading Material on Steroids" in the sticky section.
But, since you think I am the greatest and said you will listen to me, hear this: I have a sharp tongue and can cut to the bone; I'm working on that but making little progress.
The fact that you drew up that first schematic, posted it, and then defended it as a working circuit, tells me that you have little to no knowledge of the most basic fundamentals of how a triode operates. It is evident from your posts that your heart is in the right place but your knowledge is not. You are driving while blind (ZZ Top). That is a disaster waiting to happen.
Are you still with me?
As I said, your heart seems to be in the right place. Now, you need spend some serious time learning basic electronic theory and then learn how it applies to tubes. It should have been obvious to you the second you drew up that schematic that it is impossible for that to work and the reasons why.
Painting by numbers is fine. But, as soon as you deviate from a proven schematic and layout, then you need to know the reason for what you are doing. You can't just take a piece here and a piece there and hook stuff up and hope for the best. It might work--for a while.
A good place to start would be the "Reading Material on Steroids" in the sticky section.
What?
Re: Master Volume Noise
Jana, I think it is great you take the time to point these things out. Sharp tongue or not.
Steven,
This is a good place to read as well. http://www.valvewizard.co.uk/ Learning about tube circuits can be a lot of fun, so.... have fun!
Also, you know how people get experience, right? Yes, by messing up a lot. And study. I sure did (both) in the interest of learning.
Jelle
Steven,
This is a good place to read as well. http://www.valvewizard.co.uk/ Learning about tube circuits can be a lot of fun, so.... have fun!
Also, you know how people get experience, right? Yes, by messing up a lot. And study. I sure did (both) in the interest of learning.
Jelle