Quote:
Originally Posted by ronbryan
Something is wrong with those voltage readings in post #63. The ECC83 grids are direct coupled to the EF86 anode, so the voltages should be the same, especially for the first half triode. The Mullard book suggests 61V, whereas the voltages posted were 140V for the EF86 Va and 50V for the ECC83 grids.
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Hi,
My mistake the voltage of the EF86 anode is the same as the grids of the ECC83.
My mistake too on the 20x noise calculation.
I'm getting the image in the photo on the second ECC83 grid.