1. Reler to Figure 1. and remove the top cover of the transceiver.
   
    
2. Refer to Firure 2. und remove the two crews marked "A" in the drawing. Removn the RF Unit.
   
    
3. Refer to Figure 3. and remme the lour screws marked "B" restraining the IF-Unit. Remove the three connectors of Ilte IF Unit, and remove tite hoard from the transcciver.
   
    
4. Mount tite CW filter in the position shown in Figure 4. Cut the two jumpers shown in the drawing when the CW filter is installed.
   
    
5. Replace the 11 ()nit and RF Unit into the transceiver. Replace the top cover of the transceiver. Installation is now complete.

The CW filter will be selected when the MODE switch is set to CW-N while the SSB filter will be selected when the MODE ,wile t is set to ON-W.

This mod is to stop the FT-707 over heating and causing frequency drift. Especially if the rig is normally used with the front rest extended or the rig tilted back.

Just unscrew the top cover and turn it round so that the top vents are at the front of the rig and not at the back. Thus allowing the air flow through the rig to convect naturally.

I did the simple mod in 1986 and the rig is still in use as Portable, Mobile and Maritime Mobile.

The mod needs just one cross head screwdriver and about 5 minutes of your time.

Regards,

Nigel, G4NRR