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GE Superadio (1) Manual
Re-typed in HTML format, remaining as faithful as possible to the original.
CAUTION: THIS MANUAL IS DESIGNED FOR USE BY QUALIFIED ELECTRONIC TECHNICIANS ONLY. CONSUMER
USERS ARE URGED TO CONTACT QUALIFIED FACTORY AUTHORIZED SERVICE FACILITIES FOR REPAIRS.
ELECTRICAL
BATTERIES
TUNING RANGE
IF FREQUENCIES
POWER OUTPUT
10% DISTORTION
SPEAKER IMPEDANCE
AM Generator - RF Radiated Signal Modulated 30% at 400 Hz
1.
2.
3.
4.
5.
High Side of FM Sweep Generator thry a 0.04uF capacitor to TP1, Use only enough Marker Signal for Indication.
1 of 6
FEATURES
Tuned RF on FM and AM improves reception
38" swivel whip FM antenna
7 7/8" ferrite rod AM antenna
4 IF tuned circuits on AM
AFC (Automatic Frequency Control) reduces FM drift
AFC defeat switch for fine tuning of adjacent stations
Precision vernier tuning
6 1/2" high sensitivity speaker
700mW RMS audio output
Separate bass and treble controls to personalize sound
Loudness control boosts bass at low listening levels
2-Way power with built-in AC cord
Automatic switching from AC to batteries
120
Volts AC, 60 Hz
9
Volts DC Battery
(6)
D Size Batteries
AM
530 kHz - 1610 kHz
FM
88 MHz - 108.3 MHz
AM
455 kHz
FM
10.7 MHz
mW RMS
700
Minimum
8
Ohm
AM ALIGNMENT - FUNCTION SWITCH IN AM POSITION
GENERATOR
RADIO DIAL
FREQUENCY
SETTING
455 kHz
Closed
1630 kHz
Open
510 kHz
Closed
1400 kHz
Tune to Signal
580 kHz
Tune to Signal
FM ALIGNMENT - FUNCTION SWITCH IN FM POSITION
SERVICE SPECIFICATIONS
SENSITIVITY
SELECTIVITY
MINIMUM VOLUME
HUM
CURRENT DRAIN
IDLE CURRENT
ALIGNMENT PROCEDURE
INDICATOR
ADJUST
T4, T5, T6, T9
C1L
Output Meter
L5
Across Speaker
C1J, C1K
T10, L6
http://earmark.net/gesr/sr1_manual.htm
MODEL
7-2880A
FM/AM
PORTABLE RADIO
FILE TAB 7
Better than 150 uV/M for
AM
20 dB quieting
Better than 25 uV (IHFM
FM
Sensitivity
65 dB (Minimu) for 2 ACA
AM
Selectivity
50 dB (Minimum) for 2 ACA
FM
Selectivity
5 mV
or Less
AM
20 mA Maximum
FM
26 mA Maximum
REMARKS
Adjust for maximum. Repeat
until no further improvement
is noted.
Adjust for maximum
Adjust for maximum. Repeat
steps 2 and 3 until set will tune
to both band end frequencies.
Adjust for maximum
Adjust for maximum. Repeat
steps 4 and 5 until no further
improvement is noted.
7/26/2014 3:34 PM
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Summary of Contents for GE Superadio
- Page 1 GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm Re-typed in HTML format, remaining as faithful as possible to the original. MODEL 7-2880A FM/AM PORTABLE RADIO FILE TAB 7 CAUTION: THIS MANUAL IS DESIGNED FOR USE BY QUALIFIED ELECTRONIC TECHNICIANS ONLY. CONSUMER USERS ARE URGED TO CONTACT QUALIFIED FACTORY AUTHORIZED SERVICE FACILITIES FOR REPAIRS.
- Page 2 GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm GENERATOR RADIO DIAL INDICATOR ADJUST REMARKS FREQUENCY SETTING Scope at TP2. Adjust for maximum gain and 10.7 MHz Open Use Pad (See T1, T2, T3 symmetry. Repeat as necessary. Figure 1) Scope at TP3. Adjust for maximum gain and 10.7 MHz...
- Page 3 GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm ALIGNMENT PADS Click image to see full size version: Click image to see full size version: Click image to see full size version: 3 of 6 7/26/2014 3:34 PM...
- Page 4 GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm REPLACEMENT PARTS LIST - MODEL 7-2880A CAT. NO. SYM. DESCRIPTION CAT. NO. SYM. DESCRIPTION CAPACITORS POTENTIOMETERS EA30X78 C1 Tuning Capacitor RT2410 AFC Bias Trim Pot, 50K EA1BX268 C2,10,18 75pf, 50V EA49X501 Treble Control, 100K EA18X201 C3,5,6...
- Page 5 GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm EA88X129 T11 Power Transformer DIODES and RECTIFIERS EA57X14 D1, D2 RT5637 EA16X193 D4 EA16X144 D5 CABINET and APPEARANCE ITEMS CABINET and APPEARANCE ITEMS, Cont'd EA98X697 CA-1 Cabinet Front w/ Insert EA4X798 CA-11 End Cap f/Handle...
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Page 6: Service Information
GE Superadio (1) Manual http://earmark.net/gesr/sr1_manual.htm cord installation. Cement dial cord ends. SERVICE SUPPLEMENT THIS SUPPLEMENT CONTAINS UPDATED OR ADDITIONAL REPLACEMENT PARTS and SERVICE INFORMATION. PARTS LIST REVISIONS TO DATE CORRECT REF. NO. DESCRIPTION REVISION CAT. NO. EA82X50 MS-2 Whip Antenna...