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For performance, the main difference in a top-end tuner seems to lie in an elaborate IF section, including extra stages and limiters. The tuner will have more controls, giving it an impressive appearance. There is also perceived “build quality”.

There's a Scott on the bay now for $4750 (no affiliation). The seller may very well get something close.

The front end is the same type as an Eico HFT-90.

It's a hack job, whose front end is completely different from an HH Scott. The chassis appears home-made.

Joe Rosen at Audion liked them. http://lacieg2s.ca/w3terra/ols/audion.htm Internet Archive Wayback Machine

I've been sorting out some of the confusion regarding Bogen's AM-only tuners and their model numbers. This seems to be the history: There were three styles: 901, 90, 91. 7/17/1952: Drawing AM 901-1 (attached). 1953: Radio Shack catalog AM901, $55.86, no case. SAMS 2-53. 1954: Radio Shack...

https://www.channelmaster.com/collections/cables-connectors/products/outdoor-balun-matching-transformer-cm-94444

ChannelMaster

MPX info is in the SM for 348B.

Try NTE123AP

When it comes to FM, it's hard to beat clear mono.

Are you speaking of sibilance during speech? If so, the problem is probably tuner alignment. Assuming proper alignment, if it's background noise during stereo reception of a strong station, it's probably HD. Inherent MPX noise shouldn't be objectionable with a strong signal. A cheap decoder...

The cap in the Scott.

Yes, the FM output tube is not used with the MPX out. You might as well pull it. Don't know about AM. For good bass, increase the MPX output capacitor by a factor of 100.

From memory, there is an addendum to the 348B manual for the 388B.

https://www.vacuum-tube.eu/www.hhscott/default.htm

The 312-C was quite a bit more expensive than the contemporary 315. In addition to more controls,the 312-C had 3 FETs in the front end compared to just 1 in the 315. I think the IF sections were the same. The 312 and 312-B had Nuvistors in the front end; there was no corresponding 315. The...

Whoops

DownUp, The 342 and 382 do not use the 312 tuner. The 344 and 348 use the 312. Edit: The 342/382 must have used the 315 tuner.

I think this one is closely related. http://web.archive.org/web/20070602093019/http://www.lacieg2s.ca:80/public/w3terra/ols/scottie.htm

Muting circuit can be problematic, otherwise good. If it's one of the late ones with integrated circuits, grab it.

Audiokarma has previously nixed the idea. I'm pretty sure we would continue to see posts about HH Scott on various boards, so a Scott board would be pointless. We have too many boards as it is. The independent company lasted 25 years, still significant.

You originally said that the McIntosh and Marantz were restored. Are you confident that the work was competently done and included a complete alignment?

The Scott 342B was solid state, so it wouldn't need as much ventilation.

From the KCSM 91.1 website: "An affiliate of Public Radio International and National Public Radio, "