Where to find 12AX7AC5 HG+ 678?

Metlupass2

Well-known member
What does the 678 mean and can I just use the 12AX7AC5 HG+ in V1 instead at no noticeable difference? They seem impossible to find.

Are the stock tubes still

Preamp tubes:

V1 = 12AX7AC5 HG+ 678
V2 = 12AX7AC5 HG+
V3 to V6 or V7 or V9 = 12AX7AC5 HG


I did email Peter but he's out of tubes at the moment.

Thanks
 
Where are they located?
And did you have to call to ask about the HG +

I didn't see it on the website.

DUH,
Nevermind,I found it listed.
Not enough Christmas cheer yet I guess
 
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