Hi all,
I have a very nice very low hour quad of these fabulous tubes. These are the OG Canada Fuller and one of the tubes that put them on the map (now owned by Psvane). They seem to be the same internal construction as the KR Audio tube, but with black plates, ceramic base. I used these as back up tubes to my original GEC KT88's and they did a fabulous job the 2 times I had to run them. Each of those times was no longer than a few weeks, so maybe 100 hours total on these. They bias up perfectly and stay stable, unlike many new production tubes that almost never do..... They will need burn in! Last I used them, I remember them finally coming on stride, and got some enjoyable listening with them.
These are now very rare types, and this very low hour set will satisfy. A nice open focused sound, not bright, not dark. Very right sounding. They sounded much better than other new production types I had tried at that time.
How about $400 plus actual priority mail shipping cost, PayPal Friends Family, Zelle, Transfer, check cleared are all acceptable.
The KR Audio are over $1K for a quad, and these are that tube, refined by Fuller.
I offer works when you receive them, no other warranty or guarantees. I no longer have the original boxes, but will be packed very well.
Thanks for looking!

