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Last Edited:
12-Sep-2004

TYPE

IMAGE
(Click to see full-size)

CONFIGURATION, RMS RATING YEARS (APPROX.) COST NEW COMMENTS, TUBES
(tech notes)
331(A)

AM/FM-Mono
"Simulcast Stereo"
Tuner 
with Mono Preamp
1957-1958 $250
Also See AM/FM Tuners

Similar to Type 330(A) but with addition of two 12AX7's used in monophonic preamp section accommodating: Phono (Mag 1/2); Tape and TV (mono) inputs;

 Concentric Bass and Treble tone controls, Loudness compensator, early versions had "red plastic dial pointers,"  featured I/O-"loop" jacks for optional outboard noise (DNS) processor
  used wide "C" Case/chassis

Tubes:
AM Section FM Section
6BA6 6BS8
6BE6 6U8
6AU6 6AU6 (3)
6AL5 12AU7
12AU7
(2) 12AX7 (preamp) 6X5GT (Rectifier)

 

331-B

AM/FM-Mono
"Simulcast Stereo"
Tuner 
with Mono Preamp
1958-1959 $260 see above, "C" chassis,
5X4 Rectifier
331-C Scott_331C tn.jpg (5783 bytes) AM/FM-Mono
"Simulcast Stereo"
Tuner 
with Mono Preamp
1959-1960 $265 see above, "C" chassis
340(A) Scott_340A_Front_tn.jpg (4161 bytes) FM-MPX-Stereo
 Receiver, (Stereo);
27-wpc
1962-1963 $379
The Type 340(A) represented Scott's evolution of the 355/208 tuner/preamp (below) into a full receiver. It also replaced the 399.

The 340(A) did give up AM, but in exchange the audio purist got more power, in an space-efficient package.

The 340 combines a 7591-based amplifier (299-C) section and the FM-MPX Stereo tuner (350B) section on the tall "G" chassis

A conventional tuning strength meter and "Sonic Monitor" from the 350B tuner were used.

20 Tubes:

12-tube, Amplifier section:
(4) 12AX7 - preamps
(2) 6U8/6GH8
(Split-load phase inverters)
(4) 7591 outputs
(2) 5AR4/GZ34

5-tube, FM Tuner section:
(1) 6BS8/6BQ7 - FM RF amp
(1) 6U8A FM mixer
(3) 6AU6 

3-tube, FM MPX section:

(1) 6BL8 - MPX
(2) 12AU7 - MPX

340-B Scott_340B tn.jpg (5568 bytes) FM-MPX-Stereo
Receiver, (Stereo):
30-wpc
1963-1964 $399
The 340-B came on the scene a little more than 15 months after the original 340(A)'s introduction.

It's easy to confuse the 340-B with  its Slide-rule dial with later solid-state models. But the "B" featured many improvements, which apparently justified a $20 increase.

All 340-B's have solid-state power supplies, headphone outputs, input indicators, speaker switching, and the new Auto-Sensor stereo switching (6KE8) MPX  section

18 Tubes:

10-tube, Amplifier section:
(4) 12AX7 - preamps
(2) 6U8/6GH8
(Split-load phase inverters)
(4) 7591 outputs

5-tube, FM Tuner section:
(1) 6BS8/6BQ7 - FM RF amp
(1) 6U8 FM mixer
(2) 6AU6
(1) 6HS6

3-tube, FM MPX section:

(1) 12AT7 
(1) 6KE8
(1) 12AX7

345

FM-MPX (Stereo)
Receiver, (Stereo):
29-wpc
1964-1965 $365
Final (fairly rare) Scott Tube Receiver design;

Very similar styling as the 340-B, but look closely as the controls are laid out differently.

The 345 combined a 7591 amplifier section
 with a tuner section borrowed from the 350-D tuner.

(Also see similar Type 380 AM/FM-MPX  receiver, below)

 The 345 introduced several new "Space-Age" innovations:

Compactron Tubes (3):
6M11 (multiplex decoder)
  Cool "retro"  6HU6/EM87 "Magic-eye" tube rather than tuning meter

Used 6D10 (2) phase-splitters and featured individual bias controls for each output channel
(only Scott 7591 receiver to do so).

The 345's have solid-state power supplies, headphone outputs, no input indicators, speaker switching, and  Auto-Sensor stereo switching (6KE8). Only Scott receiver to use
 "sidewinder" tuner
(tuning gang shaft oriented 90 degrees from facia).

The balance control was replaced by a split-concentric dual volume control.
"Extruded Panel" styling,
slide-rule dial tuning. on tall "G" chassis

16 tubes:

Amplifier section:

(3) 12AX7-preamps, V1/101,V2
(2) 6D10 - splitters, V3/103
(4) 7591 outputs, V4/104, V5/105

Tuner section:(1) 6BS8 - V6
(2) 6U8 -  V7, V10
(2) 6EJ7 -  V8, V9
(1) 6M11 - V11
(1) 6HU6/EM87 - tuning-eye V12

355 Scott_355 tn.JPG (3813 bytes) AM/FM-MPX-Stereo
Control Center
(Stereo
Tuner-Preamp);

designed for piggy-back mounting to the
 Type 208
basic power amp
(36-wpc)
1961-1964 $335 (355)

plus

$130 (208)

$465
(for both)

The 355 was introduced as a more versatile replacement for the older 399; as such, it was the only Stereo Preamp-Tuner product ever produced by Scott.

As a Tuner/Preamp (similar to the older 331-series) the 355 had no basic power amplifier section like the 399 Receiver. Instead the 355 provided a cathode follower, line-level, preamp out --
Just add the basic power amp of your choice, usually a Scott Type 208, but Mac's and Dyna's were also popular choices.

The 355 added true FM-MPX stereo reception utilizing the 350/335 decoder design, incorporating the "Stereo Guide," 6AV6 tube indicator.

As "Simulcast Stereo" was becoming obsolete, the 355 was the only Scott AM/FM tuner to share a (very rare) common circular tuning dial. Scott engineers cleverly resurrected the 300/320 tuning gang, but thankfully left the more complex dial-cord string and slide-rule dial inventory untouched.

To accommodate a matching power amp;
 Scott offered the optional, 208 Power Amp; a modular piggy-back, design derived from the 7591-based 299-C amp. All audio connections, accessory AC, and antenna jacks were top-mounted on the shortened chassis, to facilitate the matching 208 "piggy-back" package.

18 tubes:

6-tube, Pre-Amplifier section:

(4) 12AX7 - preamps
(1) 12AU7 - cathode follower
(1) 6CA4 rectifier

5-tube, FM Tuner section:
(1) 6BS8/6BQ7 - FM RF amp
(1) 6U8A FM mixer
(3) 6AU6 (shared w/AM)

5-tube, MPX section

(1) 6AV6 (6GX8) ("Stereo Guide")
(1) 6BL8 - MPX
(2) 12AU7 - MPX
(1) 12AT7 - MPX


2-tube, AM Tuner section:

(1) 6BA6 AM RF Amp
(1) 6BE6 

380 AM/FM-MPX-Stereo
 Receiver (Stereo);
32-wpc
1963-1965 $475
Most expensive,
Next-to-last (also fairly rare)
Scott Tube Receiver design;

Once again Scott engineers creatively married past designs:

This time Scott engineers combined:
 the 320/355 AM/FM tuning gang,
with the 340-B's Auto-Sensor switching MPX section,
with a 7591-based amplifier section.

The 380 can also be identified by:
headphone outputs,
input indicators (like the 340-B),
speaker switching, and  Auto-Sensor FM-stereo switching
 
"Extruded Panel" styling,
AM/FM slide-rule dial tuning, 
traditional tuning meter
solid state power supplies, 
  all on the tall "G" chassis.
It is easily confused with the (FM-only) 340-B.

Note: two different multiplex section designs were produced; S/N 234531 and below used ZMX-6, 4-tube, MPX sections)

21 or 22 tubes
(depending on MPX design):

Amp section:

(4) 12AX7 - preamp - V1/101, V2/102
(2) 6U8/6GH8 - splitters, V3/103
(4) 7591 outputs, V4/104, V5/105

Tuner section:(1) 6BS8/6BQ7 - fm tuner - V401
(1) 6BA6 - am tuner - V402
(1) 6BE6 - am tuner - V403
(1) 6U8 - fm tuner - V404
(2) 6HS6 - V6, V8
(1) 6AU6 - V7
(1) 6AV6 - V9

MPX section (3-tube, design):
(1) 12AT7 - V501
(1) 6KE8 - V502
(1) 12AX7 - V503
or
MPX section (4-tube, Z-MX-6 units, S/N 234531 and below):(1) 6BL8 - V501
(1) 12AU7  - V502
(1) 12AU7  - V503
(1) 12AU7  - V504

399 Scott_399 tn.jpg (5395 bytes) AM/FM-Mono
"Simulcast Stereo"
Tuner
combined with
(Stereo) amp;
18-wpc
1960-1962 $399
The 399 was Scott's first receiver to incorporate a complete amplifier.
Once again, the type number was curiously the same as the price, just like the original Type 99!

Combines a 7189-based (299-B) complete stereo amp and a 330-D AM/FM-mono tuner,
on one tall "G" chassis,

Uses two (AM & FM); "Magic-eye" 6BR5/EM80 signal-strength
 indicator tubes.

23 tubes:

11-tube, Amplifier section:

(4) 12AX7 - preamps
(2) 6U8/6GH8
(floating paraphase inverter w/AC balance pots)
(4) 7189 outputs
(1) 5AR4/GZ34 rectifier

6-tube, FM Tuner (311-design) section:
(1) 6BS8/6BQ7
(1) 6U8
(3) 6AU6
(1) 6BR5/EM80 FM tuning eye

6-tube, AM Tuner section:
(1) 6BA6
(1) 6BE6
(2) 6HS6
(1) 6BR5/EM80 AM tuning eye
(1) 12AU7

37 lbs.

For a detailed technical Tuner description see: John Byrns's History of H.H. Scott Tuners.

For a detailed technical Amplifier description see: John Byrns's H.H. Scott Amplifier Specifications.

Note: Scott (Vacuum Tube) Receivers were never offered in Kit Format.

 

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