12ax7 vs 5751

Sounds like you are set on the tubes.
If you get rid of the 5751 I may be interested.
I looked up kt tunstall, pretty good. Is the recording quality? Dido kinda fits in that same sound.
My favorite cd since getting the Thor is Commodores anthology even though Im not really a Cs fan. Just sounds great!

I have 2 pairs of 5751 RCA and Sylvania, all test very good. I think they are RCA Triple Mica Black Plate, from 1960's.How much do they go for. I don;t need them, i like the 12ax7 in my VTL 5.5. 1pair RCA 1 pair Sylvania
Thanks for any info

Mcpherson,
Thor has a very very good reputation. If you can get the British tubes into the pre it will make an obvious improvement. I happen to use a highly Modded AE-3 by AES a sub brand of Cary. It is a simple pre which uses 6SN7s, they have great, mellow tone, and are highly linear. It doesn't hurt that I put some very fine, metal base Sylvania 6SN7 "Ws" in it. Thor power amps use EL 34s and would appear to be a really good choice. I have a variant of EL-34s in my power amps, the tetrode 6CA7 fat bottle by EH, which sound really big and powerful. My amps, BTW, are Opera Consonance Cyber 800 monoblocks. The inputs tubes are OS Tung Sol 5687s and Mullard 2493s a 6922 variant. My speaker cables are Jena Labs entry level, which are an all copper braid. The combination is magical.

I have 2 pairs of 5751 RCA and Sylvania, all test very good. I think they are RCA Triple Mica Black Plate, from 1960's.How much do they go for.

I just bought a pair of Rca 5751 triple mica black plates for 70usd. It's my single input tube and I love it. I've read the Sylvania's are supposed to as good but I have no experience with them.

I have Tung-Sol long plate 5751's, GE triple mica black and grey plates, Sylvania gold 3-mica grey plate, 2 mica RCA black plates, and more, but the only 5751/12AX7 slots I have are in my driver board on my power amp. I find that some of the lesser tubes can sound a little stuffy, but all of these that I listed sound pretty damn good. The Tung-Sols seem to be the cheapest (when you can find them), so that's what I use regularly. My driver board is also designed for 5751's; I've found that 12AX7's just don't sound as good in the circuit. I did enjoy 5751's in place of 12AX7's in the guitar amps I used in the past.

Grayf - I got a quad of the treasures in the mail two days ago. I think they sound as good as my NOS Siemens, Svetlanas, and RCA branded mullards fresh out of the box (and apparently there's about a 400 hour break-in window). I think you'll enjoy them.