[HAM] Best 12AU7 - now 6550

[David Anderson]

Keith,

That's good to know.

There were several iterations of the Yugo KT90s. Some worked better  
than others. You had to know which type you were getting.

Also, I don't usually play with a lot of overdrive, so I haven't  
listened to them under those conditions. On the other hand, I've  
never blown a V21 compression driver :-)

David

On Mar 9, 2008, at 7:00 AM, Keith H Clark wrote:

> Dave,
>     Let's hope this sheds a little more light on this for you.
> In general they work a bit better in a 122 than a 147. In a 147  
> driven hard,
> Jon Lord style, they tend to sound dark or muddy,if driven very  
> hard they
> suck the power supply right down. KT-88's are brighter and retain  
> that even
> on overdrive.
> I'm sorry if I don't supply theory behind each of my posts, I just get
> annoyed at times with mis-information posted.Also the tests we did  
> were 10
> years ago, I think the new 90's are somewhat different,older ones  
> pulled
> current real hard when overdriven.