Amplifier keying relay buffer interface TWO radios and 3 linear switching RBI-3a

Description

TWO radios keys THREE amplifiers with bypass switch
High quality relay box to interface between
any TWO radio
s and will key
any THREE amplifiers or two amplifiers and a noise reducer (like MFJ-1025 1026, etc)
Switch chooses one of two radios that will activate all three amplifiers
or choose center switch position to bypass the amplifiers
Many newer radios can only provide for a small amount of current on the external amplifier keying output.
Better SAFE than SORRY!
NOTE: We can make this with either Open on RX and Closed on TX or the opposite Closed on RX and Open on TX for ANY or ALL output connectors. You MUST specify if you want something different than the standard build which is normally all three output connectors Open on RX and Closed on TX
In response to your requests for a relay interface box that will key THREE completely separate amplifiers (or anything else needing a closure of contacts), we have developed this RBI-3A.
Do you have a need to key THREE amplifiers (perhaps a driver amp and high power amp and a noise cancelling box) that have three different keying relay voltages? Our RBI-3A can (for example) key one amp with a 120 VAC T/R relay and your other amplifier that uses a 12 VDC T/R relay (or ANY voltage and current up to 240 volts ac/dc @ 5 amps for EACH amp). The keying circuits in our RBI-3A are COMPLETELY SEPARATE from each other and the radio is isolated. EACH output is a relay closure from center conductor of the RCA jack to the outside of the RCA jack. EACH output uses completely SEPARATE relay contacts!
WHY use three amplifiers?
Some users want to extend the life of their radio's expensive final transistors by running low power from their radio into an intermediate amplifier and have that amplifier run only what is needed to get full output from their higher power amplifier.
Some users want to use an "instant on" amplifier for most contacts but still also have a larger amplifier what may require warm up time that is less frequently used. With our box, you do not need to reach in back to disconnect and reconnect each amplifier keying line.
Some users have dedicated amplifiers for different bands and antennas and also don't want to to disconnect and reconnect individual relay keying cables
Our box will draw <1 MA from your radio and will key any one, two or three separate amplifiers. A very handy accessory. Get one BEFORE you damage your radios amplifier keying output!
RCA jacks in and out
Needs 9-15 VDC at only 100 ma!
Connect our RBI-3A to your radios keying circuit (ground center conductor to key our box)
Connect your amplifier relay keying input to any output on our RBI-3A, connect your other amp keying line to the other RBI-3A outputs
You can use 1 or 2 radios and 1, 2 or 3 amplifiers
Relays rated up to 240 VAC or 125 VDC at 5 amps any polarity!
Relay output closest to 12 vdc cable is rated
up to 240 VAC or DC at 5 amps any polarity!
Genuine relay used for switching (not an easy to damage solid state device)
Both amplifiers switch at the same time
Both amplifier keying lines are completely isolated from each other
BYPASS switch (amplifiers are not keyed by either radio)
100% hand made and tested by Hams for Hams in Colorado
This is not one of those types that make you use a battery to power the unit! This high quality device is powered by your station power supply or any filtered DC source from 9-15 VDC (only 100 ma required) Need the best DC power supply? See our ebay store for SAMLEX power supplies.
Need to key only one amplifier? See our eBay store listing for the RBI-1 amplifier keying relay interface
Need to key up to SIX amplifiers? See our eBay store listing for the RBI-6a amplifier keying relay interface
Contact us for custom made amplifier PTT relay keying interfaces. (What we make is in response to what YOU have asked for)
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. Get our RBI
73, Dan W7RF ( Radiodan )
Ham Radio linear amplifier amateur amatuer radio interface relay keying
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