# Amplifiers and Switches

## Amplifiers

Settings → **Amplifier** is a **list**: configure several amps (e.g. two SPEs
run in parallel), each with its own name and connection. Brands:

- **SPE Expert** (1.3K / 1.5K / 2K) — USB serial or an RS232-to-Ethernet
  bridge. OPERATE/STANDBY, ON/OFF, Low/Mid/High power level, live status.
  Switching the amplifier **on and off** uses the remote-on control lines, so
  it needs the **USB (or RS-232) connection**, not a network bridge — the ON
  button works even while the amplifier is off and reporting nothing.
- **ACOM** (500S / 600S / 700S / 1200S / 2020S) — serial or bridge.
  OPERATE/STANDBY/OFF, live power / SWR / PA temperature / band / fan.
  Power-ON works over serial when the cable wires the DTR/RTS pins.
- **PowerGenius XL** (4O3A) — direct TCP. Operate/Standby, fault display, and a
  **fan-mode** selector (Standard / Contest / Broadcast).

Where the controls appear:

- An **amplifier card** in the FlexRadio panel and in **Station Control**:
  OPERATE/STANDBY, ON/OFF, power level, output-power bar and live FWD /
  drain-current / temperature meters. Several amps → one card each.
- A **status chip per amp** in the bottom bar: green ON AIR = OPERATE, orange =
  STANDBY, red = offline. Clicking it toggles OPERATE/STANDBY.
- A **docked widget** (flame icon, next to the keyers): Operate, power ON/OFF,
  the SPE power level and live watts / SWR / temperature, in the narrow column
  format of the Tuner Genius widget. With several amplifiers configured, a
  dropdown on the icon picks which one it shows — or **All**.

### Band-follow (amp on a second COM port)

An ACOM or SPE that normally polls the radio for its frequency can follow
OpsLog instead: OpsLog answers the amp's polls **as a Kenwood rig** on a second
COM port (Settings → Amplifier → frequency port). Useful when the real radio's
CAT port is already taken by OpsLog itself.

## Tuner Genius XL (4O3A)

Settings → Tuner Genius (IP only; port fixed at 9010). Live **SWR and forward
power** with peak-hold, **Tune / Bypass / Operate-Standby**, and the two
channels A/B (source, frequency, antenna) shown and click-selectable. Available
as a docked widget, a card in the FlexRadio panel and a card in Station
Control. Direct TCP — uses one of the box's connection slots.

## Antenna Genius (4O3A) antenna switch

Over TCP / GSCP — a docked **A/B antenna-switch** widget:

- One row per configured antenna, with a **Port A** and **Port B** button.
- Colours: green = selected on port A, blue = selected on port B, red (pulsing) =
  that port is transmitting. Clicking a selected port deselects it (→ None).
- **Band filter** (funnel icon): shows only the antennas configured for the
  current band. Antennas with an unknown band mask are always shown.

Configure the host / password in Settings → Antenna Genius.

## Relay boards (Station Control)

USB relay boards for antenna/accessory switching, with named buttons in Station
Control: **Denkovi** (4/8 relays, FT245) and generic **CH340 / LCUS**
USB-serial boards. A Test-connection button and detection feedback live in the
setup panel.

## Station Control

The Station Control tab is a dashboard of fixed-width panels that wrap to fill
the window — amplifier(s), tuner, relays, rotator, Ultrabeam… Drag a panel by
the grip on its left edge to reorder; the order is remembered.