I have, for sale, a home brew switch that allows changing the length of the ATAS-100 or 120 using manual control.
This was built to allow me to use a rig (other than the FT100) with my ATAS-100 to change the band tuning, using a manual Up/Down switch. I no longer have the ATAS-100, so I no longer have any need for the switch.
I built this device using an internal DC regulator that changes the voltage to the antenna to 8V to pull the antenna DOWN, and 11V to push the antenna UP. The Input and Output are clearly labeled, and uses BNC connectors.
Includes an LED for power indication that comes on with the switch. The circuit also includes a B
IAS-TEE circuit to pass the DC to the antenna without shorting the voltage to ground through the rig. This control is connected in the coax line between the rig and the antenna. It requires 12-15 volts input (standard coaxial DC type connector) input.
Tuning procedure is to change the length of the antenna (UP or DOWN) until the rig noise increases, then tweak in low power transmit mode for lowest SWR. Should work with most 100 Watt rigs into the ATAS-100 or ATAS-120.
Pictures are posted under "ATAS Manual Switch", in the FT-100 group photos, which should be:
e Yaesu FT-100 & FT-100D List
I'm asking $35 shipped CONUS, Outside the US, pays the extra shipping.
If you're interested, contact me:
w ZERO ih at arrl dot net
I prefer PayPal.
W0IH at arrl dot net
Post message: FT100-hHKSG33TihhbjbujkaE4pw@public.gmane.org
List owner: FT100-owner-hHKSG33TihhbjbujkaE4pw@public.gmane.org
FAQ on WWW: http://www.k0lee.com/ft100faq.html
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