Kenwood TS-590S manual Reception, CN101 CN102 CN103

1 RECEPTION

Following is a figure that represents the TX-RX UNIT that has the circuitry configuration in question. By detaching the lower case, you can access the jumper connectors CN101 through CN103.

CN101

CN102

CN103

Figure 1-8 TX-RX UNIT

1)Raising sensitivity in the BC band:

Remove the jumper for CN103 and insert the jumper into CN102. This will increase the sensitivity in the BC band for 20 dB. (Assuming that there is the high output power in local broadcasting stations in the BC band, the sensitivity is lowered by 20 dB as the is factory default.)

2)Changing the attenuation amount of ATT:

Remove the jumper of CN101. This changes the attenuation of ATT from 12 dB to 20 dB. (Store the removed jumper in a secure place for future use.)

Hints and Tips

“The output level of the headphone jack is too high?”

The headphone jack of the TS-590S is designed to have, as on the previous HF transceivers, an impedance of 8Ω (standard). Therefore, if you use a headphone with impedance higher than 8Ω, you will experience the symptoms as below.

•The volume level is too high overall.

•Even if AF Volume is turned down, a hissing residual noise is audible.

•Even if the beep sound level is set to minimum, the beep sound is loud.

If you experience these symptoms, use a set of headphones with impedance close to 8Ω.

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CONTENTS

TS-590S