Thanks Dubstep Girl for a well written rectifier comparison. Should become a great reference thread here. Great job!
I would also like to add a often over-looked rectifier, a Brimar ( STC ) 5V4G/CV729/GZ32. I have the CV version from 1955 and it is a pretty decent rectifier in the right applications. I have it in a stock 2012 Woo Audio WA6. combined with RCA 6FD7 "fat bottles", and 6SN7 ( using WA's adapters), Ken-Rad 6SN7GT- VT231 and RCA 6SN7GT-VT231 grey glass tubes. I also have used a Amperex GZ34 ( 1957 ) and a Tung-Sol 5U4G from 1952.
The Brimar 5V4G/CV729 has tight bass, goes pretty deep, just ever so slightly on the warm side of neutral on the mids, and some warmth ( slight roll-off? ) on the highs. Has a wide, horizontal soundstage, and nice space and definition. It betters the Tung-Sol in all areas except the clarity of the highs, and just about matches the deep end in punch and depth of the Amperex GZ34. Soundstage is better than both of the others by a wide margin. If you need a rectifier with a controlled but deep bass , and a "soft" top end, it's a very nice rectifier. The older 50's version has a square getter not unlike the early Brimar 5R4GY. That seems to matter to some.
Also, for what it's worth, the guide in the Woo Audio site and manual for the WA6 incorrectly refers to the 5V4G as directly heated. It is a indirectly heated type, ( slow ramp-up ).
thanks! i was trying to find one of these for a good price, seems like an interesting tube. i know the CV593 (mullard version of gz32?) is very nice, i have to try it again to make sure i was hearing right, but it sounded extremely good, almost like a GEC tube with the tone and body as well as clarity.
interesting. ill have to look out for one perhaps. the bottom getter is the one i tried, and it wasn't bad, but it was kinda mediocre sounding.
Edited by Dubstep Girl - 12/19/13 at 11:41pm