Originally Posted by gibosi
It is my understanding that a 5998 requires a different cathode resistance than the 6AS7 in order to really shine. That said, lots of folks have put 5998's into amps designed for the 6AS7 and believe they are an improvement. As the LD was not designed to run 6AS7's, it is just really, really tough to predict how they will sound.....
But "Then again, nothing ventured....!! ...And if nothing is lost, better still."
And for sure, if they are not a significant improvement, you could likely resell them for what you paid... so nothing lost....
So I say, 'Go for it!" lol :)
SAVINGS RAIDED!! (Have I finally lost the plot?).
Hey, gibosi, methinks you just might have something to answer for, lol...especially if "She who must be obeyed" finds out how much I paid!
Well, I took your advice (sic) AND the plunge. But given the question mark over the 5998's requirements, I treated myself to an early Christmas present (or rather another one!)...a pair of NOS British made CV2523s (6AS7G equivalent, as you know) which should be OK and which would appear to be at least as good as, if not better than, the 5998 (depending on ears, of course).
The heart attack, thankfully, has been mediated by several factors :
1. The 5998s, with customs and VAT, now come up to their price level (when they used to be MUCH cheaper).
2. As you said, if not much different, I could always resell...hmmm...any real chance of that happening?!
3.Cheaper than a MK9/La Figaro/Glenn etc etc.
4. If my poor LD does finally succumb to the torture, I could get yet another Christmas present - a La Figaro 339, which I am sure would say "thank you"!
So, as you can see mon ami, I've done a fairly good job of convincing myself of my folly...and of absolving you of all blame (well, nearly all!! ). Now I just can't wait to get my sticky hands on 'em, and see if they really do better the Chathams...