6.
The following accessories are available for more sophisticated operation of your transceiver.
6-1. CRYSTAL FILTER INSTALLATION
1.Remove the top cover from the radio. Be careful of the speaker lead, which may be unplugged.,
2.Remove the seven screws securing the IF unit to the chassis.
3.Install the crystal filter in the appropriate location on the IF unit. The SSB filter goes towards the
center and the CW filter towards the ec;jge of the board. Solder the filter in place, and cut off the ex- cess lead lengths.
Note:
When soldering use a low wattage iron (40 watts or less), and a high quality rosin core solder. Do not use acid core solder as this will eventually cause damage to the circuit board. Solder quickly, but en- sure that you have a good solder connection. If the connection is dull, or looks crystalized you will have to remove the solder and try again.
4.When installing the optional crystal filter, move the white or blue lead, or both to the appropriate ter- minal as shown in the chart on page 28.
5.Replace the IF unit and secure with the seven screws removed in step 2.
6.Reattach the speaker lead, and replace the top cover.
Note:
Two terminals are provided for the WIDE and SSB jumper. Either of the two terminals may be used.
| CW | FILTER |
|
|
|
|
|
|
| ||
Center | frequency |
|
| 8,830.7 | kHz |
| |||||
Passband | width |
|
| 500 |
| Hz |
| dB) | |||
Attenuation |
| bandwidth |
| 1.5 | kHz | dB) | |||||
Guaranteed | attenuation |
| More | than | 80 | dB | |||||
| CW | NARROW | FILTER |
|
|
| |||||
Center | frequency |
| : | 8,830.7 | kHz |
| |||||
Passband | width |
| : | 270 Hz (- 6 dB) | |||||||
Attenuation |
| bandwidth: |
| 1.1 kHz (- 60 dB) | |||||||
Guaranteed |
| attenuation: |
| More |
| than | 80 | dB | |||
| SSB | NARROW | FILTER |
|
|
| |||||
Center | frequency |
| : | 8,830.0 | kHz |
| |||||
Passband width |
| : | 1.8 kHz (- 6 dB) | ||||||||
A ttenuation |
| bandwidth: |
| 3.3 kHz (- 60 dB) | |||||||
Guaranteed |
| attenuation: |
| More | than | 80 dB | |||||
|
| SSB FILTER |
|
|
|
|
|
|
| ||
Center frequency |
| : | 8,830.0 | kHz |
| ||||||
Passband width |
| : | 2.4 | kHz | |||||||
Attenuation | bandwidth | : | 4.2 | kHz | dB) | ||||||
Guaranteed attenuation : More than 80 dB
YK-88CN
YK-88SN
27
