Table of Contents
Advertisement
13.
Heavy"cluty
power
transformer.
125 and 117volt
pri~
mary
taps
permit trouble-free operation
in
high
line
voltage
areas.
14
Extra-rugged GZ34rectif!er tubewith
indirectly
heat-
ed cathode
to
eliminate high
starting
voltage
on
electro-
lytic filter
capacitors,
and
to
delay
the application of the
full
B+ voltage
to
the amplifier tubes
until
they
have
warm-
ed
up.
15.
Fuse
and
panel
mounted
fuse
holder.
16.
Control of
bias
voltage
for
output
tubes.
SPECIFICATIONS
Output
Power:
50
watts continuous; 100 watts
peak
*
IM
Distortion (60
&
6000cps
at4
;
1)
;
below
1%
at
50 w;
1/2%
at
20
w
*
Total
Harmonic
Distortion
;
below
1%
20cps
-
20
kc
within
1
db
of
50
*
Frequency
Response;
1w;
±0.5db
6cps - 60kc; ±1 .5db 6cps
-
lOOkc
50w;
±0,5db
15cps
-
60
kc;
±1 .5db 15cps
-
lOOkc
±
0.
1
db
20.cps
-
30kc
at
any
level
from
1
mw
to
50
watts
No
peaking
or
raggedness outside
the
audio range.
e
S
quare
Wave
Response
s
20cps
—
20kc
essentially undistorted;
3
5us
rise—
time.
Inverse
Feedback;
20
db
Stability
Margin
;
15db
(virtually
absolute
stability)
Damping
Factor
;
above
12,
20cps
-
20
kc;
17
at
1
kc.
Speaker Connections;
4,
8,
and
16 ohms.
Tone
Control Range; gt
lOkc
-
15db
boost
ond
15db
cut;
ot
50cps - 15db
boost
and
15db
cut.
Phono
Equalizer
Curves
;
RIAA (New AES, NARTB,
ORTHO,
RCA), Columbia
(original LP),
London,
American
78,
European 78.
Sensitivity
;
Phono
(magnetic)
_
8
millivolts for rated
output
on
PHONO
LO
input;
27
millivolts
on
PHONO
HI input.
Tuner,
TV,
Tape, Auxiliary
0.6
volt
for
rated output.
input
Impedances;
PHONO
LO &
PHONO
HI
-
47K;
AUX, TUN,
TV,
TAPE
-
2.2 meg.
Tape Recorder Output;
1000 ohms;
unaffected
by
tone, loudness,
or level controls.
Hum
&
Noise
Level;
Mag.
Phono
__
**
60db
below
rated
output (RIAA,
max,
gain,
and
tone
controls
set at flat position).
Tuner, etc
75db
below
rated
output (max. gain
and
tone
controls
set at flat positions).
Power
Source
;
117V,
60cps; draws
150VA
at
no
signal,
200VA
at signal
developing
rated
50w
output;
250VA
at signal
developing peak
lOOw
out
(overload).
Tubes;
2" EL34/6CA7, 2"
ECC83/12AX7,
1"
ECC90/6C4,
1-
6CG7,
1"
GZ34.
Size;
HWD;
8 1/2"
X
15"
X
10".
Weight
;
30
lbs
*
Measured
from high
level Inputs
with tone
controls set at
"flat" positions
and
loudness control at
maximum
(no effect).
**
Includes effect of
16db
boost
at
60cps due
to
RIAA
compensation.
2
17,
DC
balance adjustment
of
output
tubes;
convenient
metering
terminals
provided
18.
Switched and unswitched convenience
outlets.
19„
Heavy
gauge cadmium
plated
steel
chassis;
baked
metal-
lustre
statuary
bronze
finish.
Brushed
brass
control
plate,
20.
Premium
quality
audio
and
rectifier
tube types used
exclusively,
21.
Optional matching decorative cover.
Advertisement
Table of Contents
