Please don't buy fakes. Here is a reference photo: 6n8s, 15 79 reflector, 6n9s reflector square getter. 6n9s square getter sound similar to 15 79. If you can read and solder consider other options than 6dj8, for example, 6n16GVIR (black 6n1p for reference)

Real 15 78 and 15 79 tubes have 2 pairs of curcular metal stabilising bars. My 15 79s were made in Saratov (reflector) and have carbolite bases. They are great, matched (2.21 and 2.21ma, 2.10, 2.11)ma); however, they only have 50 hours of guaranteed work life. Mine has around 1k hours in vali2...

6dj8 family of tubes is very popular, therefore good tubes are way overpriced these days. If you know how to use a soldering iron, give subminiature tubes a chance. I'm currently using a soviet mini dual triode, 6N16G-VIR, a special purpose, heavier version of 6,16b. All aspects of sound are...

This mini tube, 6n28b-v is without doubt the best one I've put in Vali2 so far. It is just great. I tried to connect 2 6s31b-r, however one of them was dead on arrival :frowning2: 18 mA/V

Currently listening through two 6S51N-V nuvistors.   Nice. Vali2 seems to chew through everything triodish.   For the octal lovers: 1759, incredible power:

Do you make octal adapters yourself, or are they available somewhere? I am eyeing a 6n9s, which is an equivalent of 6sl7.

I hope I'm not breaking any forum rules here, but I could sell you some of my russian tubes. 50$ for a tube is literally 25 times more than what I've paid for them...

Hello. Here are my thoughts regarding Vali2, after a couple of months. I listen to it through dt 990 600 Ohm. I love it, easily the best sound I've ever experienced. Regarding a previous post here, it has enough power to make you go deaf (maybe that makes sense, a a long-term way of saving money...

I'd like to add that currently my Vali2 is running on a Tesla E88CC, with militarymarkings and manufacture code which makes no sense (101, U3, U8 with a small arrow in superscript; see on attached photos). The main difference between that bulb and the stock 6BQ7A is in the soundstage and in bass...

Hello everybody!   This is my first post here. Mainly based on this thread, I bought a Vali2 last month. Tesla e88cc (military) sounds great on that thing, together with DT990. Recently, I came into posession of some NOS 6n2p tubes. From what I could find, they have the same pinout as the...