KENWOOD TS-950S (01) PDF Document

If your KENWOOD TS-950S equipment causes harmful interference to radio or television reception, which can be determined by turning the equipment off and on, you are encouraged to try to correct the interference by one or more of the following measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

4. Consult the dealer or an experienced radio/TV technician for help.

By extending the front feet, the front panel of the KENWOOD TS-950S can be elevated for operating convenience. To do this, turn the front feet left and pull them down. Then, turn them right to lock.

Your key should be connected as illustrated in the provided diagrams. When using an electronic keyer, ensure the polarity is set for positive. Always use a shielded line from the key to the transceiver (diameter 6.0 mm).

To use an external straight key: Connect the tip of the plug to the positive terminal (+5 V, Contact Current about 1 mA) and the sleeve to Ground. The ring of the plug is not used.

For an electronic keyer: Connect the tip to the positive terminal (+5 V, Contact Current about 1 mA) and the sleeve to Ground.

Note: Check the polarity of the plug when you use an electronic keyer. See Section 4-3-6 for additional CW key/keyer connection information.

Headphones: Any low-impedance (4-16 ohms) headphones may be used with the transceiver. Connect the headphones to the front panel PHONES jack (diameter 6.0 mm). The optional HS-5 or HS-6 headphones are best suited for use with this transceiver. Stereo type headphones can also be used.

Microphones: Any microphone with an impedance between 500Ω to 50kΩ may be used with this transceiver. The KENWOOD microphones MC-43S (handheld), MC-60A, MC-80, MC-85 (table-top type) are recommended.

Direct keyboard entry of the operating frequency is possible using the Numeric Keypad on the transceiver. This allows for rapid changes in frequency.

Note: You cannot enter any frequency which is outside the coverage of the radio.

1. Press the ENT key. The display will indicate ENT.

2. Enter the desired operating frequency from Most Significant Digit to the Least Significant Digit. You do not have to enter trailing zeros, but you must enter leading zeros.

3. After the least significant digit has been entered, press the ENT key again to signify you want the radio to change frequency. If you entered the frequency down to the nearest 10 Hz, a beep will sound and the radio will automatically change to the new frequency without needing to press the ENT key a second time.

For example, to enter 14.200.00 MHz there are two methods:

Method one: Press [ENT], [1], [4], [2], [ENT]

Method two: Press [ENT], [1], [4], [2], [0], [0], [0], [0]

4. If you make a mistake while entering the frequency and have not yet pressed the ENT key, or entered the final digit, you may cancel the input by pressing the CLR key.

In CW operation, equalizing the receiving frequency with that of your transmit is called “Zero beating”. The KENWOOD TS-950S/950S DIGITAL enables you to zero beat in the following manner:

1. If the VOX/MAN switch is VOX, set it to MAN and depress the key.

2. A side tone will be heard from the speaker. (Note: Turn the MONI switch to OFF.)

3. Adjust the TUNING knob so that the transmit frequency of the station you are receiving is equal to the side tone frequency.

Zero beating is now completed.

The TF-W function allows you to transfer the sub receiver data into the split transmit VFO (A or B). The capability of receiving on two frequencies at the same time and the TF-W function are provided to make split frequency operation as convenient as possible. After tuning in the DX station, press the SUB key to begin receiving on the sub receiver. You can listen for those stations who are currently talking to the DX station at the same time as you are monitoring the DX station. This will make it easy for you to find out how far he is operating up or down in frequency. Once you have discovered his pattern, you should select split transmit operation and then press the TF-W key.

Notes:

1. This feature is disabled when the difference between the TX and RX frequencies is greater than ±500 kHz. A morse code “OVER” will sound through the speaker if you press the TF-W key under these circumstances.

2. When the TX VFO is operating in the MEMORY mode or if both the RX and TX VFO are in the MEMORY mode this feature will not function.

3. Some combinations of transmit and receiver frequencies might result in an internal heterodyne signal (birdie). This is not a defect and is caused by certain frequency relationships.

Several of the functions of the KENWOOD TS-950S transceiver can be changed at the time the transceiver is turned ON. Repeat to release each function.

Several alarms have been included to signal errors that you might encounter. The chart below lists the possible causes and the resulting Morse code alarm. Morse code will be heard from the speaker.

The Speech Processor is used when signals from your station are weak at the distant station. During SSB operation (especially DX operations), it may be desirable to increase the relative “talk-power” of the transmitter by using the speech processor circuitry.

Operation

1. Turn the PROC switch ON and place the METER switch to COMP.

2. Adjust the PROCESSOR IN control while speaking into the microphone in a normal tone of voice, for a peak COMP scale reading of no more than 10 dB. Do not overdrive the COMPRESSOR. This will deteriorate voice quality, increase transmitter noise level, and in general make copying your signal more difficult.

3. Next, set the METER switch to ALC and adjust the PROCESSOR OUT control while speaking into the microphone. Ensure that the meter deflection is within the ALC zone!

Depress the VOX switch. While speaking into the microphone, increase the GAIN control until the VOX relay just operates. Clockwise rotation of this control will increase the sensitivity. For VOX operation it is sometimes desirable to “Close-Talk” the microphone in order to prevent background noises from tripping the transmitter.

1. Check that the ALC reading on voice peaks is still within the ALC zone on the meter. If necessary, readjust the MIC gain control for the proper ALC reading.

2. If the VOX circuit is activated by the output from the speaker, adjust the ANTI control as necessary for proper VOX operation.

3. Do not use excessive VOX or ANTI VOX settings. This may cause the VOX circuit to operate erratically. Use only the necessary control setting.

4. If the VOX circuit transfers between words, or holds too long, adjust the release time-constant using the DELAY control.

If the transceiver is operated into an antenna with a high SWR, the final stage SWR protection circuit may operate (when SWR is greater than approximately 2:1). Use of the Automatic Antenna Tuner will help you to match the antenna to the transceiver.

1. Set the THRU/AUTO switch to AUTO. The AT TUNE indicator will light and the transceiver will adjust to its preset condition.

2. When preset is completed and the AT TUNE indicator goes out, set the AT TUNE switch to ON. The transceiver goes to the CW mode, the AT TUNE indicator lights, and the unit starts tuning.

Note: This switch will not function when the CAR LEVEL control on the top cover is turned fully counterclockwise.

3. When tuning is completed and the AT TUNE indicator goes out, set the AT TUNE switch to OFF.

4. A warning beep tone is sounded when tuning is not completed within 15 seconds. Turn the AT TUNE switch OFF. Place the TUNE switch on the top cover in MANU and turn the AT TUNE switch back ON again. While reading the SWR meter, alternately turn and adjust the R-TUNE and X-TUNE controls on the top cover for the lowest SWR. When tuning is completed, the AT TUNE indicator will go out. Once it goes out, further tuning will not be possible even if you turn the controls.

Note: If manual adjustment fails to lower the SWR and complete the tuning, adjust the SWR of the antenna.

To erase a specific Memory Channel on your KENWOOD TS-950S, press and hold the CLR key for approximately 2 seconds, or transfer data from an empty Memory Channel to the Memory Channel you wish to clear.

Repeaters permit a very wide coverage area at relatively low power levels using the FM mode.

1. First select the desired receiver frequency in RX VFO.

2. Press the A=B key.

3. Set the TX VFO to B and select the transmit frequency for repeater operation by using the TX VFO/SUB control.

4. Press the TONE key. The tone frequency will be displayed.

Note: The tone frequency is available during SPLIT operation when both the transmit and receive frequencies are in the FM mode.

5. Select the tone frequency by using the TX VFO/SUB control. The 39 built-in tone frequencies are shown below.

Note: Consult your KENWOOD service center when you want to use the tone frequency of 1750 Hz.

6. Press the microphone PTT switch, or set the REC/SEND switch to SEND and speak into the microphone.

Note: Check the intended transmitter frequency before transmitting to avoid interrupting another QSO.

7. Release the PTT switch, or place the REC/SEND switch to REC.

The knobs, front panel and cabinet of the transceiver are likely to become soiled after extended use. The knobs should be removed from the transceiver and cleaned with a neutral soap and warm water. Use a neutral soap (not harsh chemicals) and damp cloth to clean the cabinet and front panel.

To remove the covers from your KENWOOD TS-950S, remove the top cover and the bottom covers from the radio.

Cautions:

1. Before removing the cover, turn the POWER switch OFF and disconnect the power cable.

2. Voltages of approximately 80 volts are present in this transceiver!

3. Do not pinch wiring when opening or closing cases.

To adjust the sidetone level, turn VR2 while holding down the key in the CW mode for the desired tone level.

To adjust the beep tone, turn VR1 to the desired tone volume.

Set the input level for the desired modulation level with VR1. Input is reduced by turning the control counterclockwise, and increased by turning clockwise.

The external control relay is not activated at the factory so that the operation of the radio will remain at the lowest mechanical noise level during CW Full break-in operations. If the use of this control relay is required, such as for use with an external linear amplifier it may be activated with the following procedure. Set the LINEAR AMP switch to ON.

Most linear amplifiers require a ground on transmit. This is available by connecting pin 2 of the remote connector to ground. Then connect the center conductor of your linear’s relay control line to pin 4. The relay in this transceiver is capable of handling 100V DC at 500 mA.

Note: The TL-922/922A is NOT designed for Full Break-in operation. Attempting operation of the linear in this mode might lead to damage in the linear amplifier.

About the Activation Time for the CW SEMI break-in Signals

Activation takes several 10 mS from when the key is pressed to the signal transmission when a linear amplifier (such as TL-922 / 922A, etc.) using a relay control for transmit / receive signal conversion is connected. To delay the signal activation time, observe the following indications:

Tune the transceiver to one of the normal frequency standard channels such as are provided by WWV and JJY. Adjust the transceiver until the two signals are zero beat. As you tune closer to the point where the two signals are zero beat you will hear the audio tone begin to pulsate. When the two tones are actually “Zero Beat” the pulsing will have stopped or at least slowed to a point where it is just noticeable. Once you have reached this point you should note the frequency on the display. If it is not exactly at zero (10.000.00 MHz for example) you should tune the main tuning control for zero. This will cause the pulsing audio to reappear. Now turn the F.ADJ trimmer on the back of the set until the pulsing audio again disappears. Recheck the dial frequency to ensure you are still on zero. If so this completes the calibration, if not repeat until it does.

Note: This equipment was calibrated at the factory using an external frequency standard and should not require recalibration. Do not attempt recalibration unless it is necessary.

You might wish to use an external frequency standard to accomplish the zero beat procedure. We would recommend the use of a standard that is capable of providing 1Vp-p at 10 kHz.

When using the external frequency standard you should place the REFERENCE OSCILLATOR switch to the OSCILLATOR position.

If you are using the SO-2 you must place the Xtal switch to the Xtal position. Refer to section 7-4 for additional information on this switch.

Be sure to unplug the AC power cable before starting work.

1. Remove the bottom cover of the transceiver. Refer to Section 6-6-1.

2. Remove the screws and take out the filter as shown.

3. Attach the SSB filter and secure it with the supplied screws. The filter is not polarized so it may be placed in either direction. Set filter switch 4 ON.

4. Replace the bottom cover.

Note: Avoid catching your fingers and wiring harness when closing.

1. Remove the bottom cover of the transceiver. Refer to Section 6-6-1.

2. Remove the screws from where filters will be installed as shown in the figure.

3. Attach the filter(s) and secure it with the screws you just removed. The filters are not polarized so they may be placed in either direction.

4. The desired filters can be arranged matching the number of the filter switch to the number of the installation for each filter.

5. Replace the bottom cover.

Note: Avoid catching your fingers and wiring harness when closing.

1. Remove the top and bottom covers and open the subchassis. Refer to Section 6-6-1 and 6-6-2.

Caution: Open on a flat surface.

2. Plug the 8-pin connector onto the VS-2.

3. Use the three screws supplied with the VS-2 to install the VS-2 on the subchassis.

Caution: Keep the pan-head screw and cushion provided with the VS-2 for later use. They are not needed now.

4. Close the subchassis and replace the top and bottom covers.

Note: Avoid catching your fingers and wiring harness when closing.

1. Remove the case and open the subchassis. Refer to Section 6-6-1 and 6-6-2.

Caution: Open on a flat surface.

2. Remove the screws from the printed board closest to the rear panel. Take out connector CN11.

3. Lift up the printed circuit board.

4. Set the changeover switch to SO.

5. Attach the SO-2 to the indicated area. Some models may come with the SO-2 factory installed. The SO-1 may also be used.

6. Replace the printed circuit board and tighten the screws. Replace connector CN11.

Note: Avoid catching your fingers and wiring harness when closing.

7. Close the subchassis and replace the top and bottom covers.

Note: Avoid catching your fingers and wiring harness when closing.

1. Remove the cover on the bottom case. Keep the screw provided with the unit for later use.

2. Attach the DSP-10 and screw it on. Fasten the DSP-10 with three screws provided with the unit.

3. Plug the connectors into DSP-A and DSP-B on the rear panel.