Connecting the FT-1000MP to the Ten-Tec Centurion or Alpha 99
The Yaesu FT-1000MP and either of these amplifiers are an excellent match and are
easily interfaced for qsk operation without using the internal relay of the FT-1000MP.
You will need the proper 8-pin DIN plug for the MP's Band Data jack on the rear panel, as
well as a length of two conductor shielded cable and two phono plugs. The phono plug for
"KEY IN" on the Centurion or "RELAY" on the Alpha 99 connects to pin 2 of the DIN plug and
the phono plug for "KEY OUT" (both amps) connects to DIN pin 8. Ground the shields via DIN
pin 3. The last paragraph of page 68 of the FT-1000MP manual gives a good explanation of
The "LIN" switch on the MP rear panel stays in the off position. Leave the Centurion's
"Control Mode" switch in the QSK position.
You may also want to refer to Connecting the FT-1000MP to Acom 2000A or other QSK amp, which
has a more general treatment of the subject. Note that I didn't find it necessary to use
the pullup resistor on pin 8 as is shown on that page.