One more update on my new acquisition before I stop posting on this thread about the reissue v4bb as I'm more than a little off topic:
I pulled the chassis and the amp is indeed a 77. Most date codes are between the 30th and 40th weeks of that year. The amp has clearly never seen a smoky bar or household as it is as clean as the day it was built inside. The amp is completely unmolested save the power plug, which is a cheap hardware store replacement.
Can someone measure the height inside the head box on their vintage v4 out v4b? Should I make it just tall enough for the rails the chassis sits on? That would leave an approximately 1/2" gap below the back panel.
Thanks for all the help.
I have made a few of them. I don't have one with me now - but I always built the enclosures so that the bottom of the metal brackets rested on the bottom panel - and I would leave the same amount of space over the top of the amp that the combo enclosure has (maybe a 1/4 inch?). I prefer to mark/drill the side bolt holes before assembly - it is a bit easier that way. The holes can be drilled a bit larger in case the placement is imperfect.
