someone posted one of these videos a month or two ago, but it was such an interesting topic I wanted to show links
to these five videos made by Mullard . . . .
https://www.youtube.com/watch?v=xnvKCC6_VDQ
https://www.youtube.com/watch?v=qSDDNg4Zb3w
https://www.youtube.com/watch?v=8ztjI4geVRA
https://www.youtube.com/watch?v=wDgOuI-RzgY
https://www.youtube.com/watch?v=1qMvhxo6B84
and to finish off, I love this quote "there's no such thing as the best sounding tube"
https://www.youtube.com/watch?v=YfBTlJBWoGw
one more, this is a modern video actually explaining tube construction
https://www.youtube.com/watch?v=WnZRJjmOZb8
to these five videos made by Mullard . . . .
https://www.youtube.com/watch?v=xnvKCC6_VDQ
https://www.youtube.com/watch?v=qSDDNg4Zb3w
https://www.youtube.com/watch?v=8ztjI4geVRA
https://www.youtube.com/watch?v=wDgOuI-RzgY
https://www.youtube.com/watch?v=1qMvhxo6B84
and to finish off, I love this quote "there's no such thing as the best sounding tube"
https://www.youtube.com/watch?v=YfBTlJBWoGw
one more, this is a modern video actually explaining tube construction
https://www.youtube.com/watch?v=WnZRJjmOZb8