each wire must be placed correctly, each lead must be
the precise length and each capacitor must be in an
exact position. So each wire, each capacitor, each lead
is checked and rechecked for maximum performance.
This assures you of the best possible FM stereo
reception.
The tuner section uses six tubes and two transistors.
Tubes as RF amplifiers still give maximum sensitivity
with the greatest overload protection.
The MPX section of the MAC 1 700 uses 2 transistors
and two tubes. In test after test this particular MPX
section out-performed all other designs. The channel
separation of the MPX section is better than the chan-
nel separation found with most phono cartridges. The
distortion of the MPX section is less than what the FCC
requires FM stations to maintain. You will hear all there
is to hear from stereo broadcasts.
SPECIAL FEATURES
A power output monitoring circuit prevents failure of
the power output transistors due to a speaker short
circuit, open circuit, or incorrect low impedance.
All transistors have a safe power dissipation area. This
area is called the "safe operating area." If a transistor
dissipates power beyond its "safe operating area" it
destroys itself. Your MAC 1700 has a power output
monitoring circuit that prevents the output transistors
from exceeding their "safe operating area." When
your MAC 1700 operates normally the power monitor-
ing circuit has no effect on signals going through the
power amplifier. If, however, the power dissipation in
the output transistors becomes excessive due to speaker
short circuit, open circuit, or a very low impedance
load, the monitor transistors sense this through sam-
pling devices in the output circuit. The monitor tran-
sistors restrict the drive to the output transistors. The
restricting operation of the power monitoring circuit is
immediate for any input signal or load combination.
This arrangement assures complete circuit reliability for
all load conditions. The monitoring circuit provides
an extra margin of protection for your MAC 1 700. The
monitoring circuit prevents failure of the power output
transistors due to short circuit, open circuit, or incorrect
low impedance load.
The power transistors are mounted on oversized ano-
dized heat sinks. The heat sinks assure a law tempera-
ture for operation of the transistors. If temperatures
increase due to a shorted speaker, or restricted ventila-
tion then an automatic temperature switch turns off your
MAC 1700. The switch will turn your MAC 1700 on
again when the temperature has decreased to a value
suitable for normal operation. This additional feature
gives your MAC 1700 reliability under the most extreme
operating conditions. The power transistors used in
the output section of your MAC 1700 are selected for
their high power dissipation capability, wide frequency
response, and large "safe operating area." In addi-
tion, each power transistor is given four separate tests
before it is put in your MAC 1700. This additional
testing assures you of full rated power from 30 to
20,000 cps.
Now sit back and relax with the knowledge you have
"THE BEST."
2
(24 pages)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals