Carl: The HT-41 can be modified to take two 572B's. A few minor changes - biggest is the tube sockets need to be changed. Wayne N1WR >Date: Mon, 3 Nov 2008 18:27:39 -0500 >From: "Carl" <km1h at jeremy.mv.com> >Subject: [Amps] Tube substitute in a Hallicrafters HT-41? >A friend has a dead amp and the 7094's are almost unobtanium. Has anyone >done a swap? >Carl >KM1H