Marconi BH-30 Auto-Tune Linear Amplifier pair 3-500Z
- Marconi BH-30 Commercial HF Linear Amplifier 1.8-30 Mhz. Rare. Pair of brand new RF Parts TAYLOR 3-500Z Triodes. Auto-Tune. Auto-Tune is a VERY nice feature allowing quick band changes. Pristine condition. 1250 Watts output CW keydown. Have used for 20 years but need to downsize. Built for continuous service the amplifier is HEAVY at 350 lbs! Rack Mountable 28″h x 19″w x 18″d. (Plate XFRM & HV choke make up significant portion of weight). Interlocked & airflow loss protected. Power supply is 3.2 KV with choke input. Time delay filament inrush protected. DC servo motors driving load & tune. Programed for all HF bands (12 CHNLS). Full original factory manual. Comes with separate channel selection rotary switch and interface cable/connector than can be conveniently located. This is a commercial amplifier that was built with no expense spared. Can be seen in operation. $1200 obo.