Shootout of Nos 6sn7 tubes

@lowrider57

If the listed price is 150$ instead of 250$, then I may take the risk.

But I will wait for the tube coming from Ukraine.

As writing this, I am happy with sound out of KR vt231 which sound sweet, laid back and punch.

By the way I use demagnetizaion track for speedy burn in.

It seems to work well.

Thomas

Yeah, I don't want to spend $250 on tubes I'm not familiar with. If I knew they were the holy grail I would go for it.

I found that Nos12sn7 tubes are available at lower price.

But I like full and sweet sound out of 6sn7.

Did you change the filament voltage on the amp concerned to suit the12SN7? All other things being equal, the filament voltage shouldn’t make the slightest bit of difference to the sound. You were hearing the difference between the tube types, not the difference between absolutely otherwise identical tubes using different filament voltages.

To make a sweeping statement that 6SN7 tubes are ‘fuller and sweeter’ than 12SN7s, or 8SN7s for that matter matter without conducting a series of tests using controlled samples is simply not credible.

My amps have no internal switch for 12 volt filament.

Thus I can not use 12sn7

https://www.usaudiomart.com/details/649606105-pair-melz-russian-1578-6sn7-metal-base-super-tubes/?utm_campaign=new-watchlist-added&utm_source=transaction&utm_medium=email

I placed an order for this genuine "Melz 1578" at 250$.

Although I do not need more 6sn7 tubes, I pulled the trigger for shootout.

Let us see what happen!


The following is quoted from Jesse Brennt.

http://www.audiotubes.com/6sn7.htm

" New Old Stock White Box, aged. This is the rare military version of the 6H8C with the special 1578 stamp on the glass that audiophiles look for, NOT the junky blackbase version selling elsewhere for $25. Worldwide stocks of the military version have virtually vanished from the market. Heavy duty metal bases, T-shape plates with the holes in the sides, and spring steel plate supports like Tung Sol oval plate construction! These tubes have incredible air, image, "rosin-on-the-bow" realism, and powerful yet accurate bass. Very hot testing tubes with great gain, yet incredibly quiet. Some clients say these are the best 6SN7 tubes they have ever heard. I have a few RARE matched pairs of these, carefully selected and matched to within 1-2 percent. SINGLES ARE $100 EACH. Better grab them now, before these Russian beauties become rarer than Faberge"