I posted a photo of some of my amps at another blog site and a member questioned the identity of my 596 rectiifer. He'd never seen one before as well as the rest of the community on that blog. So I told him that it was a UE 596 and said that it was hard to find but told him that prefer the Tung-Sol 5U4GB as well as the RCA 5U4GB. Alex Cavalli sent me a prototype of his new amp and thank goodness it doesn't need a rectifier. It is a hybrid amp and uses one E88CC. Presently it sounds very good and is warm sounding (in a particularly satisfying way) but still retaining incredible detail in the mid to upper ranges. The bottom goes about 7 leagues down. ;)
The red faceplate is borrowed from the LF MKII. This is called the Liquid Cobalt.