12-23-2014, 11:53 AM
Very nice Joe!
I've read a lot about the 70 and know there are many mods that can be done. They seem to be a very popular amplifier.
I've read where the 6GH8's are a good replacement for the 7199's. As you know, many tubes like the 7199's are getting up there in price. Many people think they sound as good or better too which is a big plus
I did a similar driver swap in a set of Heathkit W5M amplifiers many years ago using 6CG7's in place of the 12Au7's. In that swap there was a big change in sound. I used them for about 3 or 4 years. The W5M's could be hard on tweeters as many Williamson designs were. I found out there were mods to help prevent this, but I had bought and restored other tube amplifiers by then and ended up selling them.
I'd like to listen to a ST70 sometime.
Merry Christmas!
I've read a lot about the 70 and know there are many mods that can be done. They seem to be a very popular amplifier.
I've read where the 6GH8's are a good replacement for the 7199's. As you know, many tubes like the 7199's are getting up there in price. Many people think they sound as good or better too which is a big plus
I did a similar driver swap in a set of Heathkit W5M amplifiers many years ago using 6CG7's in place of the 12Au7's. In that swap there was a big change in sound. I used them for about 3 or 4 years. The W5M's could be hard on tweeters as many Williamson designs were. I found out there were mods to help prevent this, but I had bought and restored other tube amplifiers by then and ended up selling them.
I'd like to listen to a ST70 sometime.
Merry Christmas!
