Svetlana 12AX7 preamp tubes???
dr.underhill
Is anyone familiar with Svetlana producing a 12AX7 preamp tube?
I have seen a listing thru "Triode Electronics" in Chicago, but fail
to see them listed elsewhere. Just installed a set of 6L6GC's from
Svet and found them to be everything i had been told and more. Would
love to try some preamp tubes if they exist.
thanks.
Fred Nachbaur
12AX7, there it is in the lower left corner of the page (you'll have to
scroll down to see all of it). The direct link is
http://store.yahoo.com/triodeel/12axsvetrust.html
On the topic of Russian small tubes, I've had experience with
ElectroHarmonix 12AT7 (shipped from Triode in place of JJ/Teslas, which
were presumably out of stock at the time). Wonderful tubes. Also have
had good experience with Sovtek 12AX7's. Out of half-a-dozen I've tried,
none were unduly microphonic (one of my biggest criteria in small tubes,
especially when used as input stages).
Cheers,
Fred N
dr.underhill wrote:
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Xavier van Unen
> Is anyone familiar with Svetlana producing a 12AX7 preamp tube?
> I have seen a listing thru "Triode Electronics" in Chicago, but fail
> to see them listed elsewhere. Just installed a set of 6L6GC's from
> Svet and found them to be everything i had been told and more.
different (to see) from the Sovteks and others I have lying around.
Once I've tried them I'll keep you guys posted.
Regaas Xavier
www.DrTube.com
www.XtendRepair.nl
alex
"dr.underhill" <stre...@etex.net> wrote in message
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Tom Schlangen
> Wonderful tubes. Also have had good experience
> with Sovtek 12AX7's. Out of half-a-dozen I've tried,
> none were unduly microphonic (one of my biggest criteria
> in small tubes, especially when used as input stages).
I have no experience with Sovtek 12AX7 tubes,
but the preamp kit I built ca. half a decade ago, a
Raphael Orthophic VII, originally came with six
Sovtek 6922 tubes, and these proved to be quite
microphonic (all equal), especially when used
in the MM input stage.
Then I tried a few Svetlana 6922 which proved somewhat
less microphonic, but not equally so.
After some experimentation I ended up with Valvo E188CC
before the passive RIAA network, Amperex 7308 thereafter,
and the original Sovtek 6922 in the line level stage.
Okay, that was five years ago, and Sovtek 6922 are not
Sovtek 12AX7, so no conclusion on current Sovtek 12AX7
or general current Sovtek quality at all from me.
Tom
--
When in doubt, use brute force.
- Ken Thompson
Eric Erickson
(fully restored) and think they sound great. They're very quiet, free from
microphonics and have good tone. I a/b'ed em with some NOS JAN GE 12AX7's
and found them to sound very similar - maybe a tad brighter - with a little
better noise characteristics. Although, earlier version of this tube were
said to have cathode / heater leakage, these don't (at least not yet).
Productions dates were 18th week of 2001. I will test in a Fisher X-100-B
and report back....
Eric
"dr.underhill" <stre...@etex.net> wrote in message
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alex
"Eric Erickson" <eeri...@mediaone.net> wrote in message
news:L6Fa8.117$ZD.9...@typhoon.atl.ipsvc.net...
Eric Erickson
http://www.acksupply.com/
Eric Erickson
"alex" <conk...@yahoo.com> wrote in message
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dr.underhill
Hello all,
I have a follow up on the Svet 12AX7's- had been on "Newtube's"
website and had seen in the description that these were NOT
recommended for guitar amp usage (fine for hi-fi use), so i contacted
them as to the reason for this. I got a very quick and courteous
response from Joe Sausa that the current Svet 12's in the pipeline had
a pronounced 60 cycle hum, but the upcoming production will have
remedied this so that tubes shipped in the next few months should be
free of this problem. He recommends highly the electro-harmonix
12AX7EH (of which i heard great things) and so i will be approaching
my preamp re-tubing from this angle- let's face it, preamp tubes are
really pretty affordable and the chance to experiment with the EH's
will be interesting, and i can always pickup some of the Svet's later
on down the road. Many thanks to the responses to this thread, and i
will update as things progress.
Fred Nachbaur
dr.underhill wrote:
Thanks Dr. for an interesting report. However, it begs the question as
to why tubes with a pronounced 60 Hz. hum would be considered fine for
hi-fi use. I can only speculate that the assumption is that all
low-level hi-fi amps would be using DC on the filaments... On the other
hand, considering that low-level preamps would tend to be phono stages
in which the bass is boosted considerably...
In either case, I think I'll avoid the Svetlanas for the time being. I
can second (or third?) the opinion on the ElectroHarmonix valves, they
are indeed quite nice.
Cheers,
Fred N
Lord Valve
productions of this tube. I had samples from two of
them, and some from the latest batch. The previous
ones were utter crud...*way* too microphonic to use.
I got six pieces this time...two passed my QC. I might
try a larger sample, but as of now I ain't convinced...
they don't go in the catalog yet.
Lord Valve
Tone Chaperone
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