Why Buy an Expert Linear Amplifier

SPE’s Expert solid‑state linear amplifiers — along with their remote antenna switching systems — make it possible to fully automate your station with minimal external wiring.

Many operators dream of a station that responds instantly to tuning changes or DX cluster clicks, selecting the correct antenna, adjusting drive power, and optimizing operating parameters automatically. Expert amplifiers are designed precisely for this purpose. Despite their compact size and light weight, they deliver power and performance unmatched by any other amplifier in their class.

Below are the key advantages that set Expert amplifiers apart.

Built‑In Automatic Tuner

Expert’s internal automatic tuner offers unmatched flexibility and performance. Modern transceivers rely heavily on tuners to safely match antennas at band edges or when resonance isn’t perfect — and this becomes even more critical above 100–200 watts, where reflected power must be controlled.

The Expert tuner:

• Tunes instantly

• Handles up to 2 kW automatically

• Corrects mismatches up to 5:1

• Requires no operator intervention

This dramatically expands the usable bandwidth of your antennas. External tuners are bulkier, more expensive, and far less convenient.

Automatic Selection of 4 or 6 Antennas (depends on model)

The amplifier automatically selects the correct antenna for the band you’re operating on — no manual switching required.

Simultaneous Interface with Two Transceivers (Even Different Brands)

Expert amplifiers can connect to two transceivers at once, enabling:

• Instant switching (10 ms) between radios — even during a QSO

• SO2R contest operation, allowing you to transmit on one band while listening on another

• Automatic antenna selection and matching when switching radios

Most amplifiers require complex external wiring to achieve this. Expert integrates everything internally — switching happens simply by pressing the PTT of either radio.

Advanced ALC Control

Traditional amplifiers use ALC only as a basic protection circuit with a fixed threshold.

Expert’s ALC is different:

• It protects the amplifier

• It automatically adjusts the transceiver’s output power

  • Maximum power in Standby

  • Correct drive level in Operate

This eliminates the need to constantly adjust drive power manually and prevents accidental overdrive.

Complete CAT Compatibility

Expert supports the widest range of CAT protocols available, including the full Yaesu suite. It also includes:

• BAND DATA

• An internal frequency counter for radios without CAT

• Simultaneous use of two different CAT protocols on the two inputs

Full Remote Control

The free TERM software mirrors the amplifier’s front panel on your PC, giving you complete remote access to all functions.

Remote Firmware Updates

New software releases can be downloaded directly through the TERM interface.

Two Memory Banks

If you operate from multiple QTHs or use different antenna systems, Expert’s dual memory banks (A and B) let you store both configurations. This eliminates the need to reconfigure antennas and ATU settings each time.

This feature is especially useful for DXpeditions — your home setup can remain stored while temporary configurations are saved separately.

Control of Tunable Antennas (SteppIR, Ultrabeam)

Expert connects directly to tunable antenna controllers via the PORT interface. When you change frequency on the transceiver, the amplifier automatically commands the antenna to adjust.

This single connection greatly simplifies wiring, even when using two transceivers with different CAT protocols.

Flexible Management of Receiving Antennas

Expert allows advanced antenna assignment:

• Default TX/RX antenna

• RX‑only on selected bands

• RX‑only antennas (e.g., Beverage)

This flexibility is unique among amplifiers in this class.

QSK (Full Break‑In)

Expert amplifiers support true QSK thanks to precise relay control that prevents hot‑switching. They use fast, silent relays with gold‑plated contacts for excellent reliability.

Compact Size, Low Weight, and Carry Bag

The Expert 1.3K‑FA and 1.5K‑FA deliver high power in a small, lightweight package suitable for any electrical system. Their PFC switching power supply adapts to both load demands and mains conditions.

A carry bag sized for airline cabin transport is included — ideal for DXpeditions.

Full Power on 6 Meters

Unlike many competitors, Expert amplifiers deliver full rated power on 6 meters thanks to careful RF design.

Internal Station Configuration

Internal software allows you to change station behavior instantly without modifying hardware — assuming wiring is in place.

Remote Antenna Matrix for SO2R (AM‑01/6)

SPE’s Remote Antenna Matrix system allows remote control of up to six antennas using a single coaxial cable. RF, DC power, and control data all travel through the same line.

The AMB‑02 control box connects directly to the amplifier — no extra software configuration required.

The matrix can operate as:

• A 6‑antenna SO2R switch

• A 1×6 remote antenna selector

Its stainless‑steel enclosure is fully weatherproof for pole or wall mounting.

Unbeatable Performance‑to‑Cost Ratio

When choosing a new amplifier, consider the complete set of features and the price you pay. Expert amplifiers offer an exceptional combination of automation, flexibility, and performance.

More detailed information is available in the user manuals on the SPE website.

Click HERE to Shop our Expert Models

#ShouldHaveBoughtAnExpert