O rings on tubes?

[clobo]

Hi,

My last tube order included a pair of Duende Criatura (19,5 - 22 mm). They fit both my 12(xx)7 and EF86 preamp tubes.

I did not use them yet, since my RFT EF86 (same order) is pretty quiet on microphonic.

Claude

[slip]

clobo, where did you order them from?

[clobo]

clobo, where did you order them from?

Here's the link.

Claude

http://thetubestore.com/dc-19-22mm.html