K6HR Contest Station Block Diagram

SO2R HF Contest Station Configuration

K6HR Block Diagram
K6HR HF Contest Station Block Diagram

Expert 1K-FA: At the Center of SO2R Ops

The Expert 1K-FA does all the antenna switching automatically. Fully automated, and carefully programmed, the 1K-FA greatly reduces the chance of user error. The K6HR Contest Station Block Diagram makes this SO2R setup a bit easier to understand.

The transceiver is a FlexRadio 6700 featuring two Spectral Capture Units. I utilize the two SCU’s as “two radios”, each with its own amplifier, tuner, and antenna. I designate ANT1 as the Mosley TA-33-JR-NW (for all HF bands 20 meters and above) and ANT2 as my 130ft Height Compromised HF Dipole for frequencies on 30 down thru 160 meters. Low SWR across all amateur bands!

The cool trick is the operator can move freely through the bands and operate at will via either radio. The 1K-FA’s foolproof switching ensures the TX radio will get the correct TX antenna every time. The second radio, in every case will be connected to the wideband RX loop antenna.

Data Driven via Flex USB

The Expert 1K-FA and the Palstar autotuners operate based on frequency data received from the radio. The 1K-FA and the AT-AUTO autotuners follow the radio in realtime as the operator changes frequency.

The operator only needs to turn the ‘tuning dial’ and press the PTT!

LP-500 Station Monitor

I have installed the LP-500 station monitor with 4 sensors. You could say it takes the guesswork out of getting good reports!

LP-500
LP-500 Linearity Check

Leveraging the four sensors of the LP-500 Digital Station Monitor, I can ensure both amplifier channels are operating at full output, with the lowest SWR, and best linearity at all times.

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Author: K6HR

Licensed since 1994. Active on HF / VHF / UHF / Satellite.

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