In a message dated 1/31/2008 8:53:41 P.M. Eastern Standard Time,
n5tog@bellsouth.net writes:
Hello i have a swan amp with 2 3-400 the swan manial say to load it to 500
to 600 mills on the grid, i checked the internet and my manual is like the
others on the net , the bill orr handbook say 142 mills oer tube can some one
tell me if the swan manual is right or what? i just can not believe that the
swan manual 500 to 600 mills can be right can some one help hear.. Thanks
Harold n5tog
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Indeed Harold, the manual DOES state that the grid current could be between
500 and 600, it is NOT a misprint, Even the Swan Mark I and Mark II amp
manuals say the same. That is a bit high for sure. I would not worry if the
grid current reached 400ma for a pair of tubes, but at that point you are
going
non linear, Load the amp a bit heavy to reduce the grid current. Lou
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