Channel Master Probe-9 (Model #4408)

UPDATED WITH PHOTOS ON Jan 29, 2013

Model 3025 – Previously Known as Model 4408

The Channel Master Probe-9 (model 3025) was a workhorse. It was one of the most popular FM antennas in use today by FM Dxers and audiophiles. Gain is good, and front-to-back ratio is good. THIS ANTENNA IS NO LONGER BEING MANUFACTURED BY CHANNEL MASTER. The antenna consists of four folded dipoles (d1 through d4) which are all driven. In front of the dipoles are 5 directors (1-5). Note that there is no reflector as such. The last dipole acts as a reflector. Each dipole is tuned to a specific portion of the FM band. Spacing between each director is 15 inches (38.2cm). Spacing between dipoles is 20 inches, or 50.8cm.

This is the last of the four dipoles. The harness runs from the top of the last dipole to the top of the next dipole.

This is the connection from the last dipole to the second dipole. Notice the harness runs under the antenna boom to the third dipole.

This is the connection to and from the third dipole. The harness runs over the boom to the fourth dipole where the antenna is connected.

Here we are at the fourth dipole where the antenna is connected and where the two booms are connected. The dipoles have about 2.25″ of airspace between upper and lower halves.

And finally this is the rear half of the Probe 9. The dipoles are not fully extended due to lack of space.