Front Panel Information and
Use of Controls
INPUT SELECTOR
The four position
INPUT SELECTOR
chooses the input
program selected.
The INPUT SELEC-
TOR is turned to:
AUX: Connects the
output from any
high level program source requiring flat amplification
connected to the Aux input jacks to the high level in-
put stage. Such a source could be another tape
recorder, a television set. etc.
TUNER: Connects the output from an AM or FM
tuner to the high level input stage. In this position the
C 504 has flat amplification.
PHono 1: Connects the output of a magnetic phono
cartridge plugged into PHono 1 to the phono amplify-
ing stages. The response of these stages has been
shaped to precisely conform to RIAA standards.
PHono 2: Same as PHono 1 for a second turntable.
PUSHBUTTONS
POWER ON: The POWER ON pushbutton energizes
the C 504 circuits and connects power to the black AC
power outlets on the rear panel.
The C 504 is designed so it may be used with two
tape recorders. The four center pushbuttons on the
front panel control the signal to and from these
recorders. They permit playback of either
recorder, monitor of either recorder as recordings are
being made, or copying of tapes from one recorder to
another while listening to a separate program.
MONITOR TAPE 1 pushbutton out: The program
source as selected by the INPUT SELECTOR is fed to
the power amplifiers and heard through the loud-
speakers. Pushbutton in: Signal from a tape recorder
plugged into TAPE 1 IN is fed to the power amplifiers
and heard through the loudspeakers.
MONITOR TAPE 2 pushbutton: Functions similarly
to MONITOR TAPE 1 for a second tape recorder.
IMPORTANT: When the C 504 is operated with
either MONITOR pushbutton at the in position, the
program heard will be that from the tape recorders on-
ly. Signal from any other source will not be heard. To
hear any other source, make sure the MONITOR
pushbuttons are OUT.
The MONITOR switches are mechanically in-
terlocked to prevent simultaneous monitoring from
two tape recorders. If one button is at the in position,
it must be pushed again to release it to the out posi-
tion before the other button can be pushed.
TAPE COPY T1 T2 pushbutton out: The program
source selected by the INPUT SELECTOR is fed to the
input of tape recorder 2. Pushbutton in: Connects the
output from tape recorder 1 to the input of tape
recorder 2 without affecting the program being heard
from the speakers. In this position a copy of the pro-
gram on tape recorder 1 can be made on tape recorder
2. To monitor the original use MONITOR TAPE 1
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