@hasmarto , Which tube compliment do you have? Vincent made these with different tube compliments. Here's what I have and the subs:
(2) 6*51P or 6J51P: EF184, 6EJ7
(2) 6*9P or 6J9P: E180F, 6688A, CV6189
(4) 6S3P-EV: EC86
(1) 85A2: No subs known.
Warning: Some of these preamps may have incorrect tube values printed on the circuit boards! If you decide to roll, make note of the actual tube value from the tube valve body itself before you swap.