Have seen a variety of designs using GU-84B with various anode voltages etc. Would appreciate any views about GU84 operating conditons for amateur HF SSB and CW service. Thanks and 73 Baz end Barry Kirkwood PhD ZL1DD Signal Hill Homestay 66 Cory Road Palm Beach Waiheke Island 1240 NEW ZEALAND ph/fax 64-9-372-5161 www.waiheke.co.nz/signal.htm