Hi DaddySam,
The antenna should AlWAYS be extended with the first or thickest portion out of the transmitter. Collapsing the antenna completely and powering up the radio can harm the module.
I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.
Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician
ORIGINAL: DaddySam
Hi
I'm using a Futaba 9CAF with the synthesized freq module, and was wondering about the antenna position during a range check. The module gets warm (as per usual I'm told) and I'm concerned about using the Tx with the antenna all the way retracted. I did a range check this afternoon with just the first section extended and I ran out of room after about 150 feet (not at a flying field). Should the antenna be all the way retracted or up one section?
Thanks
Sam