For those who wonder how tube sizes compare... http://www.rogerhalstead.com/ham_files/Amp_files/Tube_photos.htm This shows the 8295A, 8874/3CX400, FU728 with socket and chimney, 3CX800, FU728, and 4CX1500B No wonder the 8295A's are expensive. They are not only rare, but big as well. 73 Roger (K8RI)