Shootout of Nos 6sn7 tubes

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"

That's a great find. I found a dealer selling a NOS pair for $500.
Looking forward to your impressions.

i bought 1578 tube on the condition that I can return it if it give too much noise.

Also I do not need to pay tax here unlike Ebay.

I expect to get it coming this Friday.

While waiting for 1578 tube to be delivered tomorrow, I am using Red Brown Base Sylvania 6SN7WGT to play old Jazz by Benny Goodman.

This one is very good for i old Jazz with transparent window and nice details.

But I paid 60$ for three tubes.

https://www.ebay.com/itm/3-Red-Brown-Base-Sylvania-6SN7WGT-6SN7-All-3-hole-plates-Strong-Trio/264683854969?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

What a value!

With 14 different sets of 6sn7 tubes, i can taste various flavor like various wines.