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Instructions for connecting non-Ten-Tec transceivers to a Ten-Tec amplifier

This applies to Ten-Tec amplifier models 411, 420, 422, 422B, 425, 425D, 416, 417 and 417A.

QSK with Yaesu Transceivers:

The Yaesu QSK loop is on the band data jack. Pin 2 on the band data jack is KEY OUT and goes to KEY IN on the Ten-Tec amplifier. Pin 8 is TX IN and goes to KEY OUT on the Ten-Tec amplifier. Pin 3 is ground. The QSK/PTT switch on front panel of the Ten-Tec amplifier MUST be in QSK for all modes of operation.

Alternant CW QSK connection:

 Connect the CW key or keyer into the Key IN jack on the rear panel of the Ten-Tec amplifier. Connect a cable from KEY OUT jack on the rear panel of the Ten-Tec amplifier to the KEY jack on the transceiver. The QSK/PTT switch on the front panel of the Ten-Tec amplifier MUST be switched to QSK.

CW QSK with Kenwood and Icom transceivers:

 Kenwood and Icom transceivers do not have a keying loop. Connect the CW key or keyer into the KEY IN jack on the rear panel of the Ten-Tec amplifier. Connect a cable from KEY OUT on the rear panel of the Ten-Tec amplifier to the KEY jack on the transceiver. The QSK/PTT switch on the front panel of the Ten-Tec amplifier MUST be switched to QSK.

Non QSK with Kenwood, Icom or Yaesu transceivers:

Refer to the transceivers owner’s manual and locate the amplifier control relay (closure to ground on transmit). Connect a cable from this jack on the rear of the transceiver to the PTT JACK on the rear of the Ten-Tec amplifier. Note: On some early Titan 425’s the PTT jack is not present, use one of the KEY IN jacks. The front panel QSK/PTT switch on the Ten-Tec amplifier must be switched to PTT for all modes of operation.