The VK-76SE has this tube configuration:
4 X 6H30 tubes for the input stage
6 X 6SN7 tubes for the driver stage
4 X 6C33C tubes for the output stage
The VK-75SE and Rex amps only had 2 X 6H30 tubes for the input stage. The VK-76SE is missing the 2 X 6V6 tubes found in the VK-75SE and Rex amps. Otherwise, all of these models have 6 X 6SN7 tubes for the driver stage and 4 X 6C33C tubes for the output stage.
The Rex II amp has 4 X 6H30, 2 X 6V6, 6 X 6SN7 and 4 X 6C33C.
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