Included are the following chokes and installation guidelines for three Mercury Models:
Mercury Lite - 4 Ferrite Filters
RF Input: F240 Ring – 5-9 turns of RG-8x (1/4") size through center
RF Output: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
Relay Cable: FSB-1/2 – multiple turns through choke – ½” diameter hole
DC Power Line: FSB-1 (Big Clamp On) – 3-6 turns through center
Mercury IIIS - 6 Ferrite Filters
RF Input: F240 Ring – 5-9 turns of RG-8X (1/4") size through center
RF Output #1: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
RF Output #2: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
RF Output #3: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
ALC/Relay Cable: FSB-1/2 – multiple turns through choke – ½” diameter hole - Both ALC and Relay together thru same ferrite
AC Power Line: FSB-1 (Big Clamp On) – 3-6 turns through center
Mercury LUX - 8 Ferrite Filters
RF Input: F240 Ring – 5-9 turns of RG-8X (1/4") size through center
RF Output #1: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
RF Output #2: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
RF Output #3: FSB-1 (Big Clamp on) – 3 turns of RG-8 (1/2") size cable
ALC/Relay Cable: FSB-1/2 – multiple turns through choke – ½” diameter hole - Both ALC and Relay together thru same ferrite
USB Cable Input: FSB-1/2 – multiple turns through choke – ½” diameter hole
Remote: FSB-1/2 – multiple turns through choke – ½” diameter hole
Data: FSB-1/2 – multiple turns through choke – ½” diameter hole
AC Power Line: FSB-1 (Big Clamp On) – 3-6 turns through center
Also make sure you connect a good RF ground to the transceiver ground post.
Note to Flex Radio users: Use snap on ferrites for firewire cable, speaker cable and mic cable, Ring ferrites for Antenna output and DC power.
For additional RFI suppression, use a feed line choke at the antenna to suppress common current on the coax feed line – see our store for feed line choke alternatives for use at the antenna.
If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.