What pre-amp tubes are currently recommended for a VH4?

[Veritas0Aequitas]

Hi everyone,

Straight forward question. What pre-amp tubes are currently recommended for the VH4? I assume 12ax7s but I was wondering if there was a specific model and brand that is recommended or shipped with from the factory. Also if you could tell me if there are different ones needed still for different positions.

Thanks!

 

[hopkinWFG]

Think is ruby 12ax7ac5 ac+ cant remember but these are china 12ax7b or JJ rebranded and screened for testing and grading...

 

[Philhouse]

https://www.diezelamplification.com/manuals/service/Diezel-Stock-Tubes.pdf
Diezel Stock tubes 16.01.2017

V1: 12AX7-B High grade selection on B-side 678 or CV4004 High grade
V2: 12AX7-B High grade selection on B-side 678
V3, V4, V5, V6 (V7, V8, V9 12AX7-B
Reverb: 12AT7-C
Power tubes KT77-JJ with 35mA bias each tube, 70mA each pair