Emtron DX-1V Linear Amplifier:Restoration & Service Guide 6-Metre (50 MHz) Specialist Variant • GU74B (4CX800A) Tetrode • Single-Band 50 MHz Pi-Network • AMPC Control Board • TRIAC Soft-Start • QSK Standard • Emona Electronics Sydney 📝 VK6ADA Technical Papers 📅 March 2026…
Emtron DX-2 Linear Amplifier:Restoration & Service Guide GU84B (4CX2500A) Tetrode • 27 V Heater • 1,500 W Carrier / 7 Bands • Ferrite Toroid “L” Coil • Two-Speed Blower • Ig2+/Ig2− Screen Current Metering • RF Sub-Chassis • 9-Way Connector • Emona…
Emtron DX-2A Linear Amplifier:Restoration & Service Guide GU84B (4CX2500A) Tetrode • 9-Band Full Coverage (160m–10m incl. WARC) • RF Module Schematic in DX-1D Documentation • Two-Speed Blower • Dual Temperature Sensors • All-Band Tank Circuit Upgrade • Emona Electronics Sydney…
Emtron DX-2SP Linear Amplifier:Restoration & Service Guide GU84B • 2,000 W Carrier / 2,500 W PEP • 4 kVA Transformer • Heavy-Duty H.V. Band Switch • Horizontal AMPC Board • Dual-Polarity Screen Supply • BTA40-600B TRIAC Soft-Start • 9 Bands 160m–10m incl. WARC • …
Emtron DX-2V Linear Amplifier:Restoration & Service Guide GU84B (4CX2500A) Tetrode • 6‑Metre Specialist (50 MHz) • 2,000 W Output • Single‑Band 50 MHz Pi‑Network • Dedicated 50 MHz Plate Choke • Parasitic Suppression Critical • QSK Standard • Debut: Dayton Hamvention 2010 • Emona…
Emtron DX-3 Linear Amplifier:Restoration & Service Guide GU78B (4CX3000A) Tetrode • 3,000 W Carrier / 4,000 W PEP • 9 Bands 160m–10m incl. WARC • Dual-Fan Cooling • 700 µH Plate Choke • Horizontal AMPC Board • QSKv3 (Two Relay Options) • 60–90 W…
Emtron DX-3SP Linear Amplifier:Restoration & Service Guide Two FU-728F Tetrodes in Parallel • 4,000 W Carrier / 5,000 W PEP • 3,400 V DC Plate Supply • 9 Bands 160m–10m incl. WARC • Three Bias Pots (POT3 + POT10/BS1 + POT9/BS2) • Safety…
Emtron DX-4 Linear Amplifier:Restoration & Service Guide Two GU84B (4CX2500A) Tetrodes in Parallel • 4,000 W Carrier / 5,000 W PEP • 3,100 V DC Plate Supply • Separate Standalone HV Power Supply (3 Variants) • Three-Interlock Serial Safety Chain • Auxiliary Transformer in…
Henry Radio HF Linear Amplifiers:Omnibus Restoration & Service Guide All HF Tube & Solid-State Models • 2K/3K/4K/5K/8K Series • 1963–2005 • Los Angeles, California • Grounded-Grid Triodes • 3-400Z • 3-500Z • 8873/8874/8877 • 3CX1200A7/D7 • 3CX3000A7 • 5CX1500A •…
Heathkit SB-200 Linear Amplifier:Complete Restoration Guide Circuits • Cabinet • Safety • Component Replacement • Modern Upgrades • SB-201 Coverage 📝 VK6ADA Technical Papers 📅 March 2026 ⚡ 572B Triode — 600 W Class ⚠ High Voltage Equipment Abstract. The Heathkit…