"The original" Type 111-B
"DYNAURAL" Noise Suppressor
3-tube, outboard processor
(Click on drawing for detailed view)
The DYNAURAL Noise Suppressor was a patented design from the labs of
Hermon Hosmer Scott that launched H.H. Scott, Inc., as a firm. Think of
DNS as the "Dolby System" of the post World War II era. It permitted
scratchy and noisy 78 RPM records (then the primary media) to be enjoyed on
higher-end radio/phono consoles.
Scott did offer the DNS system under license (much like Dolby Labs) to
other vendors such as E.H. Scott and Fisher. HHS also offered DNS on its own
flagship products such as the dedicated DNS processors: 111-A/B, 112A, and
114. DNS Preamps include the mono 121-series, and Stereomaster 122.
Mono-integrated amps with DNS include the 210-series, 211 and 212 types.
Stereo-integrated amps with DNS include the 272 and 296 types.
A form of DNS even found it's way into Scott consoles in the early
sixties. Scott marketing "borrowed" the "DYNAURAL" name on the 310-FM
Tuner series, calling it "DYNAURAL Interstation Noise Suppression," a.k.a
good old-fashioned "Squelch" among DX'ers.