This is a generic linear amplifier RFI kit for DC powered amplifiers. Works on many popular amplifiers including:
Specially designed for the Elecraft KPA500 linear amplifier used with the KX3 and similar transceivers.
Included are the following chokes and installation guidelines:
Included are the following chokes and installation guidelines:
RF Input:F240 ring – 5-9 turns of RG-58 size through center
RF Output:FSB-1 (Big Clamp on) – 3 turns of RG-8 size cable
PA KEY Cable:FSB-1/2 – multiple turns through choke – ½” diameter hole
AC Power Line:F240 ring – 5-6 turns through center
Computer/RS232/AUX Cable:FSB-1/2 – multiple turns through choke – ½” diameter hole
Also make sure you connect a good RF ground to the amplifier ground post.
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.