High quality relay box to interface between any radio providing a POSITIVE voltage (5-15 VDC) * and will key any amplifier***. *IMPORTANT: THIS VERSION ACTIVATES WITH A POSITIVE VOLTAGE APPLIED FROM YOUR RADIO TO THE "RADIO AMPLIFIER KEYING" JACK ON THIS INTERFACE. Amplifier this will key *** The output of this interface is a closure of contacts Again, this model requires a "positive" voltage 5-15 VDC applied to the input RCA jack to activate. 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! Need to key TWO amplifiers? See our eBay store listing for the RBI-2 TWO amplifier keying relay interface This is not one of those types that make you use a battery to power the unit! This high quality device is power by your station power supply or any filtered DC source from 9-15 VDC (only 70ma required) 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 ) Ham Radio amplifier amateur amatuer radio amplifier relay buffer interface |