Realistic

STA-235

Amplifier, Integrated, Radio Receiver

Main Details
Maker Realistic Brand Radio Shack Company
Function
Additional Model ID AM/FM Stereo Reciever
Channels/Tracks
  • 2 × Channel
Form Factor Desktop
Signal Path Analog Hardware
Made In Japan
Date Produced 1977
Dimensions
(H × W × D)
Power Source 120v AC
Frequency Response 20-20,000 Hz ±2 dB
Notes From Radio Shack ad:
The new STA-235 is a highly versatile AM/FM Stereo Receiver which delivers
enough power to drive almost any speaker system. The "honest" 55 watts per
channel over the entire audio bandwidth will drive both "main" and "remote"
speakers. And it has the performance and convenience features that
distinguish a truly great receiver.

Integrated circuits are used for all critical circuit stages - PLL for
rock-stable Stereo, plus IF/Detector, Mute/Auto-Magic and Phono preamp.

Built-in Quatravox synthesizes 4-channel sound from ordinary stereo
sources. Whenever you're ready, just add a second set of stereo
speakers for the rear channels. It's the best of both worlds - stereo
and 4-channel.

With the FM tuner, the specifications tell the story. There's a dual-
gate MOS FET in both the FM RF and Mixer stages, resulting in greater
immunity to distortion products, excellent sensitivity and reduced
noise. When you tune, Muting eliminates interstation hiss.

Our exclusive Auto-Magic dramatically simplifies FM tuning. When you
touch the tuning knob, it lets you dial stations easily. Then as you
release the knob, Auto-Magic fine-tunes the station and locks it in for
drift-free listening.

For total circuit protection, we've built-in three special circuits -
time delay relay, thermal cut-out plus over-drive protection.

Glide-Path volume controls for each channel let you see, as well as
hear, the system's balance.

Front panel jacks let you listen to any high-level source or make tape
recordings without troublesome rear panel connections.

A wideband AM delivers that medium's maximum fidelity.

All three Tone controls are step-type and a special button defeats the
Tone controls for flat frequency response.

Two completely independent Tape Monitor circuits make it easy to
duplicate tapes or make more than one recording at one time.

At Radio Shack we also believe a receiver should look as good as it
sounds. Like every Realistic component, the STA-235 comes with a beautiful
oiled walnut case - and it doesn't cost you a penny extra.

Original MSRP: $399.95
Additional Specifications
Power Output (WPC) 55 Minimum RMS at 8 ohms from 20-20,000 Hz
Signal-to-Noise ratio 65 dB (Phono); 80 dB (AUX)
Phono Input Overload 160 mV
FM TUNER Sensitivity (IHF) 2 microvolts
Capture Ratio 2 dB
Total Harmonic Distortion @ 1000 µV 0.5% stereo, 0.2% mono
AM TUNER Sensitivity 200 microvolts/meter for 20 dB S+N/N
Displays/Indicators
Type: Needle Meter
Indication: Tuning
Type: Red Light
Indication: Tape Monitor In Use
Scale: On, Off
Type: Red Light
Indication: Input Selection
Scale: AM, FM, PHONO, AUX
Type: Red Light
Indication: FM Stereo
Scale: On, Off
Connections
Phones
Connector: 1/4" Phone Jack (6.35mm)
Dub Out
Connector: 1/4" Phone Jack (6.35mm)
AM Antenna
Connector: Binding Post
300-ohm FM Antenna
Connector: Binding Post
75-ohm FM Antenna
Connector: Binding Post
Phono Ground
Connector: Binding Post
Phono
Connector: RCA (Phono, Cinch)
AUX
Connector: RCA (Phono, Cinch)
Tape Monitor 1 (In)
Connector: RCA (Phono, Cinch)
Tape Monitor 1 (Out)
Connector: RCA (Phono, Cinch)
Tape Monitor 2 (In)
Connector: RCA (Phono, Cinch)
Tape Monitor 2 (Out)
Connector: RCA (Phono, Cinch)
Speakers A
Connector: Binding Post
Speakers A
Connector: RCA (Phono, Cinch)
Speakers B
Connector: Binding Post
Switched 100W
Connector: Other
Unswitched 200W
Connector: Other
Controls
Parameter: Power/Speakers
Control Type: Rotary Switch
Range: Off, A, Out, B, A+B, Q-VOX
Parameter: AUTO-M
Control Type: Latching Push Switch
Parameter: Lo Filter
Control Type: Latching Push Switch
Range: On, Off
Parameter: Hi Filter
Control Type: Latching Push Switch
Range: On, Off
Parameter: Loudness
Control Type: Latching Push Switch
Range: On, Off
Parameter: Mono
Control Type: Latching Push Switch
Range: On, Off
Parameter: Tone Flat
Control Type: Latching Push Switch
Range: On, Off
Parameter: Bass
Control Type: Rotary Pot
Range: -4, -3, -2, -1, 0, 1, 2, 3, 4
Parameter: Midrange
Control Type: Rotary Pot
Range: -4, -3, -2, -1, 0, 1, 2, 3, 4
Parameter: Treble
Control Type: Rotary Pot
Range: -4, -3, -2, -1, 0, 1, 2, 3, 4
Parameter: Selector
Control Type: Rocker Switch
Range: AUX, Phono, AM, FM, FM Mute
Parameter: Tape Monitor
Control Type: Toggle Switch
Range: 1, 2
Parameter: Tuning
Control Type: Rotary Pot
Range: FM: 87-108 MHz; AM: 530-1700 kHz
Parameter: Volume
Control Type: Slide Pot

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