Revox B77 Cheap NAB Adaptors

I thought I’d post up some information that maybe helpful for those vintage enthusiasts of the classic Revox reel to reel machines such as the B77 and PR99 (feature on both coming later).
The correct NAB adaptors for 15 inch reels are becoming scarce, and when they do come up they are expensive. If, like me you were unfortunate enough to go the “cheapo” route and buy the $25 dollar option from Ebay you will no doubt be disappointed. They don’t fit. This results in a ridiculous “clonk” as the reels spin round. The reason is that the diameter is too small. There have been various solutions offered such as placing a CD behind the reels etc but none have worked for me.

I though I’d try my own solution and it seems to have worked. It’s cheap and a bit fiddly but seems to do the job for me.

All you need is some electrical tape, preferably black. Cut three small lengths to go in between the notches of the adaptor, stick on to the side and carefully press over the rim and smooth down. This will give one layer of diameter expansion. Try your reel and see if there is any improvement. if not, add another layer. Continue this process until the diameter is correct.