Yaesu FT-100D (FT 100 D FT100D) user and service manual, modifications

On 2m and 70cm you all noticed that the cooling fans do not run at slow speed on stand by, like on HF and 6m.

This causes the radio get warm/hot for just doing nothing.. and that will shorten the lifetime of the parts.

Here is how you could resolve this problem by just adding 1 51ohm 1/2watt resistor between one of the black wires of the fans and ground, for instance the chassis. See picture below for my solution.(open up the bottom of the radio to get to the fan wires)

This mod will cause the fans always run at low speed. and when transmitting the fans will go fast as normaly, so you're radio stays cool!!.

Lot's of fun with this mod!.

Greets!.