Linear Amp UK MADE IN THE UK
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2-700 CCS : 64-700 CCS : DX1200
Linear Amp UK Discovery 2-700 CCS 144MHz Solid State Linear Amplifier
- 144–148 MHz (2m) linear amplifier — designed and built in the UK
- Output power: 500 W continuous duty, all modes (AM 125 W), no time limits
- Drive power: 15–20 W (5 W and 10 W versions available)
- Cooling: ultra-quiet, under 28 dBA at maximum — fanless conduction-cooled PSU
- Preamp supply & sequencing: software-adjustable voltage and delay, rear-panel or Bias-T feed
- Display: white OLED with adjustable brightness
- Connectivity: Ethernet with built-in web server for full remote control and monitoring
- PTT in and out: sequenced connections protect rig, amp and masthead preamp
- Mains input: 100–260 V, 50/60 Hz automatic
- Dimensions: 290 W × 310 D × 140 H mm (excl. feet) · 7.5 kg
Linear Amp UK Discovery 2-700 CCS 144 MHz Linear Amplifier
24/7 Power · 100% Duty · Zero Compromise
Built for full-time, all-mode operation — SSB, CW, FM, FT8, EME — all high-duty digital modes at full rated output. Continuous thermal stability with ultra-quiet cooling makes true 24/7 operation a reality.
Reviewed in RadCom, July 2026.
Download the full review (PDF)
Sub-28 dBA Cooling
Ethernet Remote Control
Built-in Preamp Sequencer
100–260 V Auto
7.5 kg
Key Performance Figures
Features
Uncompromising RF Performance
Ground-up CCS design for continuous service on modern high-duty-cycle modes. 500 W all modes including FT8 and EME – no time limits (AM 125 W). Drive: 15–20 W; also available in 5 W and 10 W versions for low-power exciters. Nil detectable spurii within the operating band.
Advanced Preamp Integration
Software-adjustable sequenced supply: 12–15 V, 30–100 ms delay, set via on-screen menus. Rear-panel DC feed or Bias-T coax injection — software selectable. Compatible with any external masthead preamplifier.
Whisper-Quiet Cooling
Conduction-cooled PSUs require no fan for the power section. Main cooling fans measure just 24.8 dBA and 19.3 dBA — near-silent even at maximum speed. Less than 28 dBA overall.
Intelligent Control & Monitoring
High-contrast white OLED with adjustable brightness. Ethernet / web server for full remote control and live monitoring. Sequenced PTT In/Out protects rig, amplifier, and masthead preamp. Fully protected against overdrive, high VSWR, and over-temperature.
Full Specification
| Frequency range | 144–148 MHz |
|---|---|
| Power | |
| Output power | 500 W continuous duty, all modes — no time limits (AM 125 W) |
| Saturated power | > 600 W |
| Drive power | 15–20 W (5 W and 10 W versions available) |
| Mains input | 100–260 V, 50/60 Hz — fully automatic |
| RF Performance | |
| Spurious outputs (harmonic) | < −70 dBc @ 500 W |
| Spurious outputs (non-harmonic) | < −70 dBc @ 500 W |
| IMD3 (two-tone, 500 W PEP) | < −30 dBc |
| IMD9+ (two-tone, 500 W PEP) | < −60 dBc |
| Input return loss | > 20 dB |
| Receive spurii | Nil detectable within operating band |
| Connectors | N-Type, input and output |
| Cooling | |
| Maximum fan noise | < 28 dBA |
| PSU cooling | Conduction-cooled — fanless power section |
| Preamplifier Supply | |
| Supply voltage | 12–15 V (software adjustable) |
| Sequencing delay | 30–100 ms (software adjustable) |
| Feed method | Rear-panel DC or Bias-T injection (software selectable) |
| Physical | |
| Dimensions | 290 W × 310 D × 140 H mm (excl. feet) |
| Weight | 7.5 kg |
Documentation
Download Operational Guide (PDF)
Linear Amp UK · Discovery 2-700 CCS · v1.2
Photos & test results
