“PI” and “T” Network Attenuators (also known as PAD attenuators) are simple networks to attenuate an RF signal with or without altering the impedance. Useful to add to the input of a high gain amplifier, that needs to be driven by a high power radio. If you want to attenuate 10w to 1w, (10dB) you will need to build the attenuator with resistors capable of dissipating 10w. For a simple recieve attenuator, you can use simple 0.25w or 0.5w resistors.
You MUST use non inductive resistors, not wire wound!