18W JCM800, chasing perfect tone
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18W JCM800, chasing perfect tone
Hi again!
We already had such discussion about issues in my amp, it looks like it is less/more stabe right now but now i started to look for modification to improve tone Now I'm playing with PI and power amp, I read somewhere that PI i'm using (Soldano Atomic values) are not the best and i decided to change it a little, but I'm not quite shure what will sound best for smooth overdrive sound as expected from JCM800 especially that I want NFB with presence control and classic EL84 designs don't have NFB. What can You tell about given schematic and how can I further modify it to check tonal differences?
We already had such discussion about issues in my amp, it looks like it is less/more stabe right now but now i started to look for modification to improve tone Now I'm playing with PI and power amp, I read somewhere that PI i'm using (Soldano Atomic values) are not the best and i decided to change it a little, but I'm not quite shure what will sound best for smooth overdrive sound as expected from JCM800 especially that I want NFB with presence control and classic EL84 designs don't have NFB. What can You tell about given schematic and how can I further modify it to check tonal differences?
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- Bieworm
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Re: 18W JCM800, chasing perfect tone
To smoothen it up I would suggest to lower the B+ substantially. Higher B+ yields more headroom, but it also makes the tone more agressive and harsher imho.
380V on the plates is pretty steep for any EL84 anyway.
380V on the plates is pretty steep for any EL84 anyway.
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"THIS should be played at high volume..preferably in a residential area"