INCLUDES High quality buffered interface between IC-705 radio and will key any amplifier*.
Many amplifiers have a voltage or current requirement too high for the delicate keying circuit inside the IC-705!
Get our cable and buffered interface BEFORE you damage your radio!

Our box will draw <5 ma from your radio and will key any amplifier. A very handy accessory. Get one BEFORE you damage your radios amplifier keying output!
RCA jacks in and out for keying the interface from your radio and output to your amplifier T/R relay control
Needs 9-15 VDC at only 40 ma, has 2.1 x 5.5 mm DC jack, universal plug and 5 feet of wire included, center positive
Relay rated up to 240 VAC at 5 AMPS! 
Genuine relay used for switching (not an easy to damage solid state device)
INCLUDES:
IC-705 keying cable
RBI-1A buffered interface
RCA-RCA cable
These are high quality, high copper braid RCA connector cables 

RBI-1 and RBI-1A are same circuit. The RBI-1A is simply a board change to better fit case

Can be used with any amplifier* that has connection for switching to ground for amplifier T/R control.
What if your amplifier requires a voltage to activate instead of a ground?
No problem!
Here is what you do:
Connect ONE side (either center or shield of RCA jack on RBI-1) to YOUR supplied keying voltage, then use the other side (either center or shield of RCA jack on RBI-1) to send the switched voltage to your amplifier. Remember, the RCA jack on the output of the RBI-1 is then being used as a switch to connect whatever you put on the shield (for example) that gets connected to the center (for example) when you key your radio.

See our eBay store listings for our complete line of Amplifier Relay Buffer Interfaces.
In other listings we have models with 2 radios and a bypass switch, 2 or more amplifiers or other device (like noise reduction unit keying, mute, etc)

When connecting your Radio and Amplifier, there may be switching voltage, polarity, and current incompatibility  that can cause damage to your radio or amplifier if connected without a switching interface between them. Even if your internal radio switching looks like it might be usable, it is wise to have an extra degree of isolation between your amplifier and radio with our relay buffer interface.

73, Dan W7RF ( Radiodan )