compatibility of intellitron

Questions & Answers
1

Have a collins 30-L amplifier Need the intellitron interface what cable would i use to connect to a icom 775DSP

Tom KK7ZEQ

2

To connect your Collins 30L-1 amplifier to an Icom 775DSP transceiver using an Intellitron interface, you need an interface unit (like the Ameritron ARB-800 or a similar relay buffer) and two specific cables:

  1. A Radio-to-Interface Cable for PTT (Push-To-Talk) Keying: This cable connects the Icom 775DSP’s accessory jack to the interface unit to safely key the amplifier.
  • The Icom IC-775DSP has a rectangular accessory jack on the rear panel.
  • The Collins 30L-1 amplifier uses an RCA phono jack for its antenna relay input (PTT).
  • The required cable is typically a shielded cable with the appropriate multi-pin connector for the Icom rear accessory jack on one end and an RCA plug (male) on the other end to connect to the interface unit’s input. The Intellitron unit (or a similar product like the W2ENY interface cable which includes the relay) requires a cable that uses specific pins from the Icom’s accessory jack for switching and power, which in turn activates an internal relay to key the amplifier’s high-voltage switching circuit.
  1. An ALC (Automatic Load Control) Cable: This cable is optional but highly recommended for proper amplifier operation.
  • Both the Icom 775DSP and the Collins 30L-1 have RCA phono jacks for ALC.
  • You can use a standard, shielded RCA-to-RCA cable (male on both ends) for this connection, running from the Icom’s ALC jack to the Collins 30L-1’s ALC jack.

Important Consideration:

  • The keying circuit in the vintage Collins 30L-1 runs on a high voltage (up to 110 VAC or DC) that can damage the delicate low-voltage solid-state keying circuit of the modern Icom 775DSP transceiver. The “Intellitron interface” you mentioned (or a dedicated relay buffer like the Ameritron ARI-800 or W2ENY cable with built-in relay) is essential to act as a buffer and protect your transceiver by using a relay to handle the high voltage/current switching required by the amplifier.
  • Ensure the Intellitron interface you have (or acquire) is a relay buffer interface specifically designed for this purpose, not just a power supply or a CAT cable interface.
1 Like
3

This is correct. The Intellitron ARI-800 does not have a cable that will suit your purpose.

4

Tom:
I was an Icom HF rig user for 43 years before I discovered the incredible FT-DX10. I believe we may have a cable for the ARI-800 and your IC-775DSP. It is not a rectangular accessory jack like several predecessors. Do you have the manual or could you download one to verify which round pin cable you need?

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5

i have the manual and the sockets are round

6

@Tom_Peck Thanks for your patience. The Intellitron ARI-7DI Interface Cable is designed to work with your Icom radio and the Intellitron ARI-800 Amplifier-to-Radio Interface Buffer. It’s in stock for $22.95.