Kenwood SP-230 User manual

------------ KEN\NOOD
MODEL SP-230 SPEAKER
OPERATING MANUAL
We're happy that you've chosen the Model SP-230 for
your receiving needs. It has undergone stringent quality
control inspection and tests prior to packing and has left
our factory in perfect operating condition. Please inspect
your SP-230 carefully for any signs of damage in transit.
If the unit is damaged, immediately notify the sales
representative from whom you purchased the unit.
GENERAL
Your SP-230 is a sophisticated external speaker designed
to further enchance operation of HF Transceivers. It fea-
tures precise audio response and matches the KENWOOD
HF transceiver in appearance. Its advantages are:
* Built-In selectable tone filters to attenuate high or low
frequency response inputs;
*Two channel selectable input and the headphone output
through the tone filters.
SPECIFICATIONS
Speaker used:
Rated Input
Impedance:
Frequency response:
Filter cut-off frequency,
LOW:
HIGH 1:
HIGH 2:
HIGH 1 + HIGH 2:
Filter attenuation:
Dimensions:
Net weight
Accessories furnished:
PACKING
12 cm dia.
2 Watts
8n
100Hz to 5kHz.
500Hz, -3dB.
3kHz, -3dB.
105kHz, -3dB.
1 kHz, -3dB.
-6dB/oct.
W 180 mm (7-1/16")
H 133 mm (5-1/4")
D 287 mm (11-5/16")
1.8 kg. (4.0 Ibs.)
Speaker cord, 1 pc.(E14-0101-05)
Extension foot, 2 pes.
(J02-0049-04)
Screw, M4 x12,2 pes.
(N30-4012-41)
1 pin plug, 2 pes.
(E20-161O-Q5 )
Please save the shipping cartons and packing material.
They have been designed for the safe shipping of your unit.
There will be considerably less chance of damage if you
ship your unit in its original cartons and packing.
CONTROLS AND THEIR FUNCTION
SP-230
II IJIiiiH-r---2
PHONES
1
3 4 5
Front Panel
1 PHONES Connector
Standard headphone output, through the tone filters.
2 INPUT Switch
Selects one of two audio inputs.
3. FI LTERS, 'LOW Switch
This switch attenuates frequenciec below 500 Hz: -3
dB at 500 Hz, -6 dB/octave.
4 FILTERS, HIGH 1 Switch
This switch attenuates frequencies above 3 kHz; -3 dB
at 3 kHz, -6 dB/octave.
5 FILTERS, HIGH 2 Switch
This switch attenuates frequencies above 1.5 kHz; -3
dB at 1.5 kHz, -6 dB/octave.
FILTERS, HIGH 1 and HIGH 2 Switch
These attenuate frequencies above 1 kHz; -3 dB at 1
kHz, -6 dB/octave.

USING COMBINED FILTERS
1. When both LOW and HIGH 1 filters are engaged, the
pass bandwidth ranges.from 500 Hz to 3 kHz.
2. When both LOW and HIGH 2filters are engaged, band-
width is 500 Hz to 1.5 kHz.
3. LOW' HIGH 1 and HIGH 2 filters engaged, 500 Hz to
1 kHz.
500Hz 1 kHz 1.5kHz 3kHz
LOW HIGH 1. 2 HIGH 2 HIGH 1
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8"
123
REAR PANEL
1, 2 INPUT connectors
Accepts aud io output from two sources.
3 LINE OUT Connector
Standard line output through the filters for RTTY.
SSTV, or similar use.
LOW
-PUSH ON-
rf'ILTERS
I
LOW HIGH I HIGH2
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L-_f-+..J
INPUT
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.- B (Oot--j-I
INPUT
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USEOF FILTERS
In general, it is desired that a CW, AM, or similar trans-
mission be received clearly within the usual communica-
tion audio bandwidth, 300 Hz - 3 kHz. However. QRM,
QRN or RFI may lower the overall signal-to-noise ratio at
the receiver, resulting in degraded reception. In theory, as
the pass-band width of the IF stages is narrowed, the equi-
valent noise bandwidth will also narrow, thus improving
the signal-to-noise ratio. Alternately, the bandwidth of the
AF stage can be narrowed to attenuate the noise com-
ponent, enhancing reception.
Proper filter selection depends on transmission mode
and type of noise encountered.
1. SSB: use the HIGH 1and LOW filters, or the HIGH 2
and LOW filters. In more severe cases, use both HIGH 1
+HIGH 2, and LOW filters.
2. CW: use the HIGH 1 and HIGH 2 filters or HIGH 1 +
HIGH 2and LOW in combination.
INSTALLATION OF EXTENSION FEET
To install the extension feet, screw to the front, bottom
of the cabinet as illustrated below.
~ Extension foot
kSCreW(M4)
A product of
TRIO-KENWOOO CORPORATION
17-5. 2-chome. shibuya. shibuya-ku Tokyo 150. Japan
TRIO-KENWOOO COMMUNICATIONS
1111 West Walnut Street. Comcton Centcrrna 90220. USA
TRIO-KENWOOO COMMUNICATIONS, GmbH
0·6374 Sternbach TS.lndustliestrasse SA. West Germany
TRIO-KENWOOD ELECTRONICS, N.V.
leuvensesteenweg 504. 6·1930 Zavent em Belgium
TRIO-KENWOOO [AUSTRAUAJ PTY. LTD.
4E Woodcock Place. Lane Cove N S.W 2066. Australia
© 15105 PRINTED IN JAPAN 850-2759-00 (K.O)