Are There Alternatives to the Marantz 10 B ?

Thanks, Tony (TLS49). Also, a photo of the MPX-100 can be seen here, and of the Scott LM-35 or 335 here (the unmarked photo above the model number listings). The LM-35 and 335 are the same except that the LM-35 came as a kit, and I believe the color of the faceplates is different.

I couldn't find a user manual for either model, but as the diagram Tony provided indicates you simply connect the MPX (multiplex) output of the tuner to the MPX input of the Multiplex Adapter, and the Left and Right outputs of the Multiplex Adapter to your preamp, all via RCA cables. The front panel controls are simple and pretty much self-explanatory.

Vintage tube tuners from that era that are mono but have a mpx output tend to sell these days for much lower prices than comparable stereo models, so even though a mpx adapter in excellent condition may sell for $250 to $300 or more, combining an MPX-100 or LM-35/335 with a mono tuner can often get you as good or better quality for significantly less money than investing in a stereo tube tuner.

Regards,
-- Al

I'm wondering then, would the multiplex adapter apply to the McIntosh MR 65 and if so, would the HH Scott and the McIntosh be of equal quality even though their sonic characteristics might possibly be different?

I'm thinking however that the 310 D would be less expensive than the MR 65.

I saw a McIntosh MA 6 multiplex adapter for $500.00 on the Audio Classics website. My assumption is that any multiplex adapter would be compatible with any mono tube tuner that accepts a multiplex adapter?

This is great, I'm learning things that I had no knowledge or familiarity with, thanks!

Glad to help, Al. Also, I have a Sams Photofact and copies of a Scott Service Bulletin and owners manual for the Scott 335 should anyone need them.

Goofyfoot, look here at the Berner's Site for MR 65 or MR 65A. This shows a MA 5 adapter that is mounted to the chassis of those tuners, and appears to work with them only. Also, the MR 65B is a stereo tuner. The MA 6 is shown on the MR 66 page, and appears that it only works with that tuner since it is powered through a 4 pin plug on the back of the tuner.

So, to answer your question, all multiplex adapters are not compatible, although it appears that the Mac tuners may work with the Scott and Fisher adapters.

Sorry to question the obvious. Yes, I later saw that the MR 65 accepts the multiplex adapter and thanks for the PDF link.

Can anyone comment on the sonic comparisons between the 310 D and the MR 65?

The reason I am mentioning the MR 65 is that they seem to appear on auction websites more readily than the 310 D and can at times be within the same price range as the 310 D.

Either way I can wait while looking periodically for a reasonable offer.

I wish my 1957 Zenith Trans-Oceanic had FM.

I'm working and looking at the links that are being sent my way so I apologize for delayed responses but everyone's been more than generous with their time and knowledge.