Hello, Jan, The A77 and B77 are 40 and 30 years old, respectively (give or take). Few tape machines are younger than 20 now. My first choice for a good machine is the Sony APR-5003 because it does not have boutique status and often can be had for $500 or so. Get a couple and then customize some of the head assemblies. The Studer A810 is also a good machine. The Studer A80 is tops. Please consider purchasing a pro machine that is rugged rather than a portable (by the era's definition) consumer machine. Between the two, I think I'd get the B77, although I've owned a half dozen A77s, I'm down to one and it's a Mk III with Dolby B on board. There are a few other European brands that might be useful. The BBC was having a big garage sale a few weeks ago. Lots of Studer A807s if I recall correctly. I don't know if that's still going on. Cheers, Richard On 2012-08-10 7:53 PM, Jan Myren wrote: > HI! > > I have a large number of reel to reel tapes and a Tandberg TD 20A machine > that doesn't work. From the net I have found that the Tandberg machines > sounds nice, but are technically not very well built. > It seems like Revox is the brand to look out for and the types of A 77 and B > 77. > > What is really the difference between those two types and which one is the > one to go for? > > All the best > Jan > NORWAY > -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.