Electro voice ev 77 88 brochure

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Elana/012;

SOLID STATE FM STEREO RECEIVERS

features at-a-glance

o All-transistor (solid state) electronics with military-type etched circuits 0 Direct-coupled output eliminates coupling
capacitors and output transformers 0 Excellent FM sensitivity and selectivity 0 Free from microphonics; exceptionally
low distortion. hum, noise 0 Automatic switching from mono to stereo without mechanical noise or change in tone 0 Wide-
band ratio detector improves tuning ease and stereo quality I Faithful reproduction of musical transients 0 Cool opera-
tion extends component life. reduces ventilation requirements 0 Attractive midnight black and satin aluminum panels

0 Tuner dial is illuminated for full visibility.

description

ElectroVoice engineers_ using their comprehensive experi-
ence in electro-acoustics and transistor circuitry research
for space projects. have taken advantage of the latest "state
of the art" and created the new E-V 88 and E-V 77 Stereo
Receivers.

E-V 88 and E-V 77 Tuner Section-The highly-advanced FM
stereo tuner circuit used in the EN 88 and E-V 77 provides
exceptional sensitivity and selectivity. lts fully automatic
mono/stereo switching is achieved without noisy mechanical
relays or audible tone variation. Four lF/limiter stages em<
ploy dual special purpose transistors to provide balanced
symmetrical limiting at each stage, Positive stereo signal
identification is provided by an automatic stereo indicator
light which. through use of a special inhibitor circuit. cannot
he triggered by random inter-station noise. Precise tuning
is effected by an accurate zero-center tuning meter. A
time-switching multiplex circuit provides inherent SCA
rejection, assuring minimum sensitivity to noise on weak
stereo signals.

E-V 88 Amplifier Section-The output of the EV 88 is cone
servatively rated at 80 watts. lHF music power (40 watts
per channel) with almost complete absence of hum, noise,
or distortion. Of the forty-three transistors used in the unit,
seventeen are incorporated in the tuner. twenty-six in the
amplifier: in addition, four silicon diodes are used in the
power supply. Stable performance and long component life
are achieved by the units extremely cool operation. Even
the small amount of heat generated by the output transistors

is rapidly and efiecu'vely dissipated through conduction to
a heavy base plate,

Feedback is incorporated around all stages-even the
magnetic phono input where it provides highly accurate
equalization. The equipment's wide frequency response. un-
usually low distortion. and exceptional square-wave response
exhibit little or no deterioration throughout the entire power
output range.

Automatic Contour Regulation. provided by a unique tone
control circuit tpatent pending) linked to the volume con-
trol. provides infinitely variable loudness compensation. Any
amount of boost selected on bass and treble controls is reg-
ulated by the volume control to reduce the amount of com-
pensation as volume is increased. The flat tone control
settings are not affected by volume control adjustments. Bass
boost is exceptionally clean feven at maximum setting.
where conventional tone controls often sound unpleasantly
hoomy.

Provisions are made for thc direct connection of extension
stereo speakers to the E-V 88, and front panel controls per-
mit independent on-ofi' switching of the two sets of speakers.

The unit is supplied complete with a black perforated
metal wrap-around cover. An optional oiled walnut wood
casc. Model CW2, is also availahlc for either the EV 77
or E-V BS.

E-V 77-Similar to E-V 88. except 40-watt lHF power out-
put. standard tone control circuit. twenty-nine transistors.
Additional specifications listed on reverse side of this sheet.

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specifications E-V 88

TUNER SECTION (excluding Multiplex)

Sensitivity:

Selectivity:

Frequency Response:

Hum and Noise:

Tuning Range:
Dritt:

Harmonic Distortion:

Better than 3 uv. usable 1HF; better
than 1 uv for 20 db quicting.
Altcmatc channel down 60 db.

: 1 db. [0 to 75.000 cps.

Better than 60 db below 100% modu-
lation at full quieting.

87.5 to 108.5 megacycles

Less than .0270

Less than 0.5%

Input Sensitivity:

Controls:

Outputs:

Output Damping
Factor:

Magnetic phone. 3 mv

Ccramic phono. tuner. auxiliary, and
tape monitor. 100 mv

Selector (Phono-Tuner-Aux)

Volume

Balance

Bass (+20 div, -20 db at 5,0 cps)
Treble (+15 db. ,, IS db at 10 kc)
Speakers l On-Ofi

Speakcrs 1 On-Oif

Tape Monitor (Source-Tape)

Mode (Stereo-Mono)

AC Power (OH-On)

Speakers 1 (4-8-16 ohms each chan-
nel): Speakers 2 (4-8-16 ohms each
channel); stereo tape recorder; stereo
headphone.

50 at 8 ohms

Auxiliary AC Outlets: 2; one switched, one ttnswitched

Image Rejection: 40 db
Capture Ratio: 3 db
Spurious Rmponse

Rejection: 75 db
Ratio Detector

Bandwidth: I megacyclc
IF Bandwidth: 250 kc
AM Supprasion: 50 db
IF Frequency: 10.7 mc
Dial Calibration

Accuracy: 1%

MULTIPLEX SECTION

"Figurcs represent maximum boost Ill low volume settings.
(Scc text for explanation of Automatic Contour Regulation
circuit.)

Channel Separation:

Frequency Response:

SCA Rejection:

Su bcarrier
Suppression:

Stereo~Mono
Switching:

Better than 30 db
: 1 db. 30 to 15.000 cps
Better than 40 db

30 db

All-electronic and automatic in pres-
ence of noise-tree subcarrier.

Limit of IHF specifications. Actual response exceeds

these figures.

AMPLIFIER SECTION

Power Output:

Frequency Response:
Channel Separation:
Harmonic Distortion:
1M Distortion:

Burn and Noise:

Form No. 103

80 watts lHF music power (40 watts
per channel): 160 watts instantaneous
peak power.

1.5 db. 8 to 50.000 cps at rated power
40 db minimum at 1000 cps

Less than 0.5% at rated output

Less than 0.5% at rated output

High level inputs-better than 80 db
down at rated output

Magnetic phono input-better than 70
db down (reference 10 mv input)

GENERAL SPECIFICATIONS

Power Requirements:

Dimensions:

110-120 volts. 5060 cyclc AC
7'43" H. x 133/4" W. 1: 9-13" D.
17% lbs.

$397.00

specifications E -V 77

All specifications same as E-V 88. except:

Power Output:

Frequency Response:

Harmonic Distortion:
1M Distortion:
"um and Noise:

Bus Control:
Treble Control:
Price:

40 watts lHF music power (20 watts
per channel); 80 Watts instantaneous
peak power.

1 1.5 db. 10 to 40.000 cps at rated
power.

Less than 0.5% at rated output

Less than 1% at rated output

High level inputs-better than 70 db
down at ratcd output

Magnetic phone input-better than 60
db down (reference. 10 mv input)
+12 db, ~16 db at 50 cps

+12 db. - 16 db at 10.000 cps
$299.00

Elam WARRANTY

THE E-V 88 AND E-V 77 ARE UNCONDITIONALLY
GUARANTEED FOR TWO FULL YEARS AGAINST DE-
FECTIVE WORKMANSHIP AND MATERIALS.

ELECTED-VOICE, INC.

0 BUCHANAN. MICHIGAN

Litho in U.$.A.