External Speaker And Headphones; Ground; Antenna - Kenwood TS-530SP Instruction Manual

2.4 MICROPHONE
Attach the microphone connector to a suitable micro-
phone, as shown in Figure 2-1. Be sure the microphone
PTT switch is separate from the microphone circuit, as
shown. It should be noted that a microphone with a 3P
plug using a common ground terminal should not be used.
The microphone input is designed for 5002 ~ 50kQ mi-
crophones. The choice of microphone is important for
good speech quality, and should be given serious considera-
tion. The crystal lattice filter in the transceiver provides all
the restriction necessary on audio response, and further
restriction in the microphone is not reqired. It is more im-
portant to have a microphone with a smooth, flat response
throughout the speech range.
Follow the microphone manufacturer's instructions for
connecting the microphone cable to the plug. With many
microphones, the push-to-talk switch must be pressed to
make microphone audio available. For VOX operation, this
unwanted feature may be eliminated, if desired, by open-
ing the microphone case and permanently connecting the
contacts which control the microphone audio.
Standard microphone sensitivity is within the range of
—50 dB to —60 dB. If a microphone having a higher sen-
sitivity is used, the ALC and compressor circuits will not
function properly. In this case, insert in the mike line an at-
tenuator as shown in Fig. 2-1c. A typical MIC gain control
setting is 12 o'clock. If you must run this control at 9 o'-
clock or less, use an attenuator.
2.5 KEY
lf CW operation is desired, connect a key to the KEY jack.
Ues shielded cable, and a standard (mono or 2P) phone
plug.
2.6 EXTERNAL SPEAKER AND
HEADPHONES
Receive audio output from the TS-530 is 1.5 watts at 4 to
16 ohms. The TS-530 has a built-in speaker jack on the
rear panel. The speaker may be an 8-ohm permanent-
magnet type, 4 inches or larger. The internal speaker is
disconnected when an external speaker is used. Head-
phones should also be 4 to 16 ohms impedance or
greater. When headphones are connected to the front-
panel PHONES jack, the speake is disabled.
2.7 GROUND
To prevent electric shock, and reduce the possibility of TVI
and BCI, connect the transceiver to a good earth ground
through as short and heavy a lead as possible.
2.8 ANTENNA
Any of the common antenna systems designed for use on
the high frequency amateur bands may be used with the
TS-530 provided the input impedance of the transmission"
line is not outside the capability of the pi-output matching
network. The transmission line should be coaxial cable.
An antenna system which shows a standing wave ratio of
less than 2:1 when using 50 or 75 ohm coaxial transmis-
sion line, or a system that results in a transmission line in-
put impedance that is essentially resistive, and between
15 and 200 ohms will take power from the transceiver
with little difficulty. If openwire of balanced type trans-
mission line is used with the antenna, a suitable antenna
tuner with balun is recommended between the transceiver
and the feedline. Methods of construction and operating
such tuners are described in detail in the ARRL Antenna
Handbook, and similar publications. For operation on the
160, 75 and 40 meter bands, a simple dipole antenna, cut
to resonance in the most used portion of the bands, will
perform satisfactorily. For operation of the transceiver on
the 10, 15 and 20 meter bands, the efficiency of the sta-
tion will be greatly increased if a good directional rotary
antenna is used. Remember that even the most powerful
transceivr is useless without a proper antenna.
CAUTION:
Protect your Equipment—Use a LIGHTING ARRESTOR.
The KENWOOD AL-2 is recommended.