*RBI-22A (select one of two radios to key 1 (or 2) amplifiers) (picture shown is not the RBI-22A, it is the RBI-1 same case and dimensions. You will get the RBI-22A)
*Kenwood TS-2000 7 pin HF high quality keying cable (5 feet) to RBI-22A
*TWO high quality RCA cables (6 feet each) (ONE from Flex 3000 or other radio to RBI-22A, ONE from RBA-22A output to amplifier)
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We use the highest quality 7 pin DIN connector, just look closely at ours vs the competition. They use the lowest quality plastic junk, we use a professional grade metal body connector with high temperature insulation that holds the terminals. Don't risk damage to your radio's connector jack, use our professional series cable and connector.
RBI-1 + Kenwood 7 pin DIN cable = RBI-1K

High quality relay box to interface between *compatible Kenwood radio models and will key any amplifier.
Many newer radios can only provide for a small amount of current on the external amplifier keying output.

Our box will draw 0.3 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
Needs 9-15 VDC at only 40 ma! 
Relay rated up to 240 VAC at 5 AMPS!
Genuine relay used for switching (not an easy to damage solid state device!)


*compatible with Kenwood radios:

  • TS-2000 HF (not VHF/UHF, see our other lisitngs)
  • TS-830, TS-850, TS-870
  • TS-930, TS-940, TS-950
  • TS-120, TS-130, TS-140, TS-180
  • TS-430, TS-440, TS-450, TS-480
  • TS-530, TS-570, , TS-590, TS-990
  • TS-680, TS-690

Need to key TWO amplifiers? See our eBay store listing for the RBI-2 TWO amplifier keying relay interface
Need to key MORE than two linears? Contact us for custom made amplifier ptt relay keying interfaces. (We just finished a SIX unit amp keying box, keyed from a single radio)

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 40ma required. Power cable style may vary.

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