I have 46 - original SV83 tubes.  These are the original CORRECT sv83's (remember the warning about sv83 tubes) 6n15nM lettering.  all manufactured around '94.
I ran into a dealer clearing out stock back in the day when I had a Zen Select amp...  the surprising thing tho, I havn't used one since I sold the amp.  

$200 for the whole lot, including USPS shipping.    Want to sell as a single lot, and not onesy, twosies   Thanks

Yes these are NOS.  sorry 'bout that.  I guess we can't assume anything these days.

There was a bad batch of Svetlana SV83's that are not recommended for any DECWARE amp. They have a smaller logo on them. There is a picture on the Amp section. The seller is indicating that he has a bunch of the "good" Svetlana SV83's

O.K, but beeing not familiar with tubes yet, what would "the wrong SV83" do to my zen?
I see there is a huge difference in price, but those wrong ones are new in box, and sold as SV83's.?
Just trying to learn here as it's a investment for a long time when I buy these "correct ones".
Nico

Lon, have you seen the page with Steve's warnings regarding the SV83's lately?  The last time I saw it anywhere on the site, it was in one of the owners manuals.  I can't seem to find any reference to it.

I know the SV83 issue was one of the reasons why Decware starting shipping the 6p15p - EV tubes.  That, and the supply of the original SED boxed SV83's dried up.

Jason

You found it! Good work.

OUTPUT TUBE WARNING
The SE84ZS is designed to use either EL84
output tubes or SV83 output tubes. No adjustments
are needed when switching from one to
the other. Of the type SV83 tubes carrying the
Svetlana name there is one batch known to be
questionable and ARE NOT RECOMMENDED for
use in this amplifier.
The tube on the left is an acceptable SV83
output tube for use in this amplifier. The tube
on the right with the smaller logo is NOT acceptable
for use in this amplifier.

So after just emailing Jason I'll take the lot, I can only hope to become a very old man with still a good hearing....
Nico

Ahhhh, better than any EL84 ever made IMHO!

Good buy NICO, this 23 pair would have been mine, if I did not have 54 pair of them.  ENJOyyyyy.
I cook out 3 pair of them a year-sometimes four. I drive them hard and almost daily in to the speakers I love. (2 pair of speakers that I swap in and out now).

Svetlana Original SV83 (video tube ya'know) wide bandwidth-musical ecstacy............. .

St. Petersburg Plant too, when it used to matter about quality out of there....... . Ironic, Cold War ends..............Vacuum Tubes go to sh __. Now, maybe coming back...........?  NOS will dry up.......... .

Stone of Tone
Well, it still does matter about quality at the SED St. Petersburg Plant.

Thanks Stone of Tone for your comment. I have bought these tubes for I am convinced my ZEN will remain in my posession for a long time....
For years I've been swapping amps and stuff; this amp is the proof that my "simple -is -best" approach works.
Never had a amp with such a sound and so little parts inside.
I've just finished my new pre-amp with the same approach; small and with only a few parts compared to all other pre-amps I owned...this simply makes my install sounds so "ALIVE"  that my wife couldn't believe it's just the pre-amp I changed.
Sold my old one the next day [which was a kinda special pre-amp already].
I'll put some pics on my Flickeraccount and post a link if anyone is interested.
Looking forward more than ever to the next family-shipment from Matt; thanks Jason.
Nico

Yes they are sent as of Tues.

Thanks again.