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Where to find 12AX7AC5 HG+ 678?
https://www.rig-talk.com/forum/viewtopic.php?f=14&t=207969
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Author:  Metlupass2 [ Wed, Dec 04, 2019 12:15am ]
Post subject:  Where to find 12AX7AC5 HG+ 678?

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

Author:  LucyLived [ Wed, Dec 04, 2019 12:49pm ]
Post subject:  Re: Where to find 12AX7AC5 HG+ 678?

FWIW my 2017 VH2 came stock with a tung sol cv4004 in v1.

Author:  Metlupass2 [ Wed, Dec 04, 2019 2:59pm ]
Post subject:  Re: Where to find 12AX7AC5 HG+ 678?

Actually found one direct from Ruby. They don't advertise them on reverb or their site but they have em.

Anyone reading this thread in the future contact

Donny McClure

donny@rubytubes.com

http://www.magicparts.com

Author:  John4021 [ Sat, Dec 21, 2019 11:47am ]
Post subject:  Re: Where to find 12AX7AC5 HG+ 678?

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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