H. H. Scott 330D (1961)

The 330D was the ultimate development of Scott's stereo AM/FM tuner line, designed to receive stereo AM/FM simulcasts. The switching provisions were much improved over those of the 330C, to provide more flexibility for the reception of AM/FM simulcasts. The slide switch was changed back to the configuration it had on the 330B, to allow switching the tuning meter between the AM and FM tuner sections, without disturbing reception. The power switch was converted to serve as the mono/stereo switch, in addition to switching power. In addition to positions for power off, monophonic operation, and stereophonic operation, it had a fourth position for stereo phase reverse. The phase revere position was useful in receiving stereo AM/FM simulcasts, to correct for reversed phase at one of the transmitters. In the 330D, a 6CN7 was used as the AM detector, replacing the 6AL5 in the 330C. The 6CN7 provided the extra triode section needed to implement the stereo phase reverse function.

H.H. Scott 330D Features:

Silver Plated Front End

FM Cascode RF End

Multiplex Output Jack

Meter Tuning Indicator

Stereo Phase Reverse Position

Planetary Tuning Mechanism

Wide Range AM Detector

AM Loopstick Antenna

Tape Recorder Outputs

Output Level Controls

Separate AM & FM Sections

Automatic Gain Control

330D Technical Specifications

Sensitivity for 20 dB Quieting :  2 μV

IH FM Sensitivity:  2,5 μV

FM Detector Bandwidth:  2 mc

FM IF Stages:  2

FM Limiting Stages:  2

Harmonic Distortion on FM:  0,8%

Capture Ratio: 6 dB

Am Bandwidth Position:  3

Output Voltage for 100% Modulation:  4 - 6

Total Hum and Noise:  66 dB (below 1  x volt)

Dimensions:  15½ x 5¼ x 13¼ inch (accessory case)