In the TS-520SE, the Heater Switch has been replaced with a CW WIDE/NARROW
select switch. For those operators who desire this type feture for their
transceiver, the following information may be considered as a guideline.
TS-520S series transceivers
- A minature SPDT switch may be installed at the operators preference, on the rear side, or bottom panel. Use this to switch the CW or SSB filters by wiring the BROWN lead, which normally is transferred to the CW terminal on the IF unit, between the SSB filter, for WIDE , and CW for NARROW.
- A Traditional solution has been to use the FIX CH switch, position 3 and 4 for filter switching. This may be donw by completely rewireing the switch, or by leaving the switch wiring and the filter wiring as for normal operation, and bridging the following terminals:
A. FIX CH C terminal to IF SSB Terminal
B. FIX CH 4 terminal to IF CW terminal
Placing the FIX CH switch to 4 will operate the SSB filter
in CW mode.
TS-820S Series Transceivers
- Similar to the TS-520 series, a miniature SPDT toggle switch may be installed at the operators preference a the rear or on the obttom cover.
- The FIX CH switch, or Digital Hold switch may be rewired to control the CW wide/narrow function
On the MODE switch, S6-1, the SSB filter control is GREEN, and the CW filter control line is GREY. Break the GREY line and connect it from the MODE switch to the SPDT common terminal. Connect the GREY line to the IF unit ot one terminal, and bridge tht GREEN SSB line to the other Switch terminal.