Tom, if Victor can squeeze more power out of a smaller, lighter VK-55 than the larger, heavier VK-75, the only answer physically would be to lower the bias. Perhaps the VK-55 does not run in triode, I can't say, but physics is physics.
I also agree that the VK-60's are a flat out steal at their used prices. If you have the space, I'd go for the VK-60.
Cheers,
John
I also agree that the VK-60's are a flat out steal at their used prices. If you have the space, I'd go for the VK-60.
Cheers,
John