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Marantz Model 20b Tuner

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Front View
Image Attribution: CWG Enterprises
Date: June 4th, 1999

General
DescriptionDifference from the 20 is front end modifications.
RarityX-Rare
Retail Price695
First Year1971
Last Year1973
Wood CaseWC-1
ChannelsTwo
Power Consumption50 watts

Physical
Width15 3/8ths
Height5 3/4th
Depth14 1/8th
Weight25 lbs

FM Tuner
Gyro TuningYes
RF Sensitivity1.8 uV
THD, Mono0.15%
Frequency Response20 Hz to 15 KHz
IF Image Rejection85 dB
Stereo Subcarrier Rejection60 db @ 38 KHz, 65 dB @ 67 KHz
FM IF Bandwidth, normal3db @ 230 khz, 80db @ 880 khz
Spurious Rejection90 dB
Stereo Separation at 1 kHz45 dB
Mono SwitchYes
Multiplex Filter (Hi-Blend)Hi-Blend
Muting SwitchYes
OscilloscopeYes
Scope Horizontal Position AdjustmentYes/X
Scope Vertical Position AdjustmentYes/Y
Scope External Audio Display CapabilityYes
Scope Internal Audfio Display CapabilityYes
Scope External Audio Gain ControlYes
Scope Tuning IndicationYes
Scope Multipath IndicationYes


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The database currently contains "slots" for many AM Tuner, FM Tuner, Amplifier and Preamplifier specifications, as well as many of the controls and features Marantz has made available on these units. You can check the Sample Unit to see all of the database slots. You might even be surprised at some of the slots that are available. However, if you come up with something that's not in the Marantz Classics database, either a specification or a feature, I can add it in just a few minutes, along with specific details about that feature for any model(s) you know of. Don't be shy - tell me!

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