RadioGuy wrote:

The thought came to me the other day whle thinking about the cost of 6JB6's
nearly $100 for a set; I paid $18.00 for a matched set of three at AES back
in the 1970's and I got plenty of spares. Why did Drake use those cheap ass
sweep tubes in their final instead of the old standard 6146 to begin with?

If you have all that gear in that kind of shape,
$100 invested in the correct tubes seems like a very good idea.