Fisher 80 AZ Brochure

Page 2

THE FISHER 30-WATT AUDIO AMPLIFIER

TIIE FISHER 1\L'l)lt)AMPLIFIER, Model till-AZ, is our great new 30~watt
amplifier with PUZtTCYStUIJP, a Peak lou er Indieulor calibrated in watts
to show instantly the peak load on your spe ' "stem. The model Bil-AZ
will meet the requirements of the most e. teting user. Complete fidelity
of reproduction and absence of listener fatigue art a direct result of the
extremely low harmonic and intermodulation distortion at all power
levels, as well as excellent transient response, wide frequency range,
and good linearity. Hum and noise are virtually nonimeasurahle, thus
allowing operation at all listening levels without the distraction of
exllullttlus noise. The great reserve power handling eapaeity of the
model 8111\Z makes it ramble of reproducingr the complete dynamic
range of a full swuphom orchestra! All components in this compact

'I'he Model fill-AZ has three separate edback loops, resulting in low
internal impedar , K tremely low di ortion and e, .ellent transient
response. 'lwo type I'LL-37 tubes, (onncrted as tetrodes, are employed
in the power stage. The unique rathode feedback (5 'uit offers all the
advantages of triode performance, together with the efficiency of tetrodes.
'I'he carefully designed output transformer consists of fifteen interleaved
\\lll(llllg.\, in ronjunttion with a grainmrientrd steel core;

'IIII) IISHIIR Model SKI-AZ may he used directly with a tuner, such
as THE FISHER Eludels SILT, BILR 0r IM-80, a crystal phone
cartridge or any other devite capable of produting a one-volt signal.
Where maenelir phonograph rartrid W! microphones or similar low-level

unit hau- l)een seleeted for long life, and installed with maximum acres-

sibility in mind. for easy Mlvit'ing.

POWER OUTPUT

INTERMODULATION msronnoN
FREQUENCY RESPONSE
k\ ,-
t r .. " / w
Mm. 5" L /,K..)/HUM AND NOISE lEVEL

INTERNAL IMPEDANCE
; t: , A .1.
PHASE SHIFT
CONTROLS
TUBE COMPLEMENT
OUTPUT IMPEDANCES

PHYSICAL DATA

Performance

INTERMODULATION DISTORTION
[MEASURED AT 60/3000 CYCIES, AT A to l)

FREQUENCY RESPONSE

POWER RESPONSE
{MEASURED AT 25 AND 30 wnrs OUTPUT)

mm .5

Technical Specifications

Characteristics

devices are employed, prerampl
to lliut latter applications is Tlllu FISHER IVIA
Series Bil-(1, and THE FISHER Audio Control, Model Fill-PRC.

O Constant within 1 db at 30 watts from 15 to 30,000 cycles.
I Less than V2 (/1 distortion at. 30 watts; less than 0.15} at 23 watts; less than 0.059; at 10 watts.

0 Less than y:% at. 25 watts and less than 02 at 10 Watts.

0 Uniform within 0.1 db from 20 to 20,000 cycles

and within 1 db from 10 to 100,000 cycles.
0 Better than 95 db below lull output.

a With Z-MATTC Control counterclockwise, 061 ohms for lfi-ohm operation, giving a damping

factor of 26.
0 Less than 15 at 20 cycles and less than 18 at 20,000 cycles.
I Total of three: PowerScope, ZMATXC, and Input Level.
I 1712AT7, 1712AU7, ZiEL-37, 175V4G,
D 8 or 16 ohms.

' SIZE: 4%" deep, 15%" wide) 6%" wide.

° SHIPPING WEicHT: 22 pounds.

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POWER OUT'PUT IN WATTS

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FREQUENCY m cvcezs FER szconn

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25 WATTS

DECllELs

30 WATTS
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FREQUENCY m cveezs pan SECOND

ion is necessarv. Especially suited
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