Tandberg tape decks

Sorry for side tracking a bit... any opinion on Revox B 215 deck and how they compared to Tandberg in sound quality?

I own an NAD Monitor Series 6100 cassette deck built in the late '80's and read somewhere it's basically a "re-branded" Tandberg. Any truth to that? It has some of the features mentioned above such as manual bias trim adjustment (called "play trim") and it has both Dolby HX-Pro and the DYNEQ circuits. If so, which Tandberg model would be the equivalent? Just curious..

Hello. Does anyone know the sizes of the cassette belts for this unit? Please message me direct.
Thanks, Izzy
randyinmiami@aol.com

I had A Tandberg TCD- 300, their first cassette deck of the series. It had 3 motors, ferrite (glass) heads, and wood end plates. I really liked the option of operating it vertically or horizontally. I fell in love with it after seeing it on the wall at the late Pacific Stereo chain store here in California in the early 70's. This deck handled tape so well due to 3 motors. I would send it to the local Tandberg service center every 2 years for new belts , pinch roller, etc. Worked every time. It is in Brooks Berdan Ltd. Audio museum now after serving me very well.

I have a Tandberg 3034 and 3014A. Any idea what they are worth these days?