Sansui TU-9900 vrs Magnum Dynalab MD-90T

My first thought is, will you have any sonic improvement going to the 90T.

I used a TU717 for a short time and it performed very well and if the 9900 you were to pick up was working properly I suspect it would perform very well. Still, I question why sell the nice tuner you have for an older one. IMO your tuner is better looking too. Have you considered updating your FT-101?

This doesn't address your question but IMO a better choice is a Mac MR-77.

In the context of the higher priced models i.e. 65, 71, and 78, an MR-77 is the genuine "sleeper" in the McIntosh line of tuners.

Good luck.

The Mac tuners will eat the MD for lunch!
You may even be able to get a pre-amp/tuner for less than just a tuner?

I would go for the TU9900, but plan on setting aside some $$ to replace the 30 yr old capacitors, and get an alignment. The Mac MR77 is also a good alternative.

Both of these models and more are covered in the fm tuner site on line. fmtunerinfo dot com.

I don't know if this is an issue for you, but do consider that many recommendations that are made here will be made more on the basis of the technical performance associated with receiving and processing signals than the quality/tone of the tuner in your system.

For example the Dynalabs had great spec's when they first came out, but the tonal qualities were IMHO poor. They finally tried to correct this by introducing tubes. I replaced my old Dynalab with a Perreaux which had lousy reception but great (warm) 'sound' which fit well into my, then, SS system. After converting my system to tubes and didn't need the 'warmth of the Perreaux I went on to a vintage Accuphase 101- great sound and spec's, built like a tank to boot. Neutral in the best sense.

Just something to consider, or not...........