Hi Robert:
I'm with you, the WE 396A was my favorite too... Until I tried Aaron's suggestion of using an adapter in order to use 6SN7s. I don't know if it has anything to do with the lower gain of the 6SN7 but it just sounds overall better to me. I'm alternating between a pair of 1940s Raytheon VT-231 (6SN7) and Tung-Sol round-plate, black-glass 6SN7s.
In case anyone is curious, there was a post the other day titled "A Better 6SN7 Adapter" in the General Discussion forum. This adapter was for replacing the 12AU7 in the Crack with a 6SN7. Since the 12AU7 has a totally different pin-out than the 5670, that adapter can't be used with the Paramounts.
So I contacted the manufacturer of the "better" adapter and asked if he could make a special one for me for the 5670. He got back to me and explained that he would have to create a new PCB board for the 5670 pinout and unless he could sell a quantity of them, it wouldn't be worth the effort.
Normally, I wouldn't bother to persue this any further but if you compare his adapter to the ones on eBay, you will see there's no comparison. It's not likely we'll get enough people interested in the "better" adapter but if you are, send me an e-mail and I'll see how many we could order. Thanks!
Gerry