12AX7 tubes
j...@gwis.com
I'm looking for alternatives. In the past I've bought NOS Phillips JAN
12AX7s. These are more money of course and even though they sound great,
there seems to be a high percentage of them that are microphonic, right out
of the box.
What about the Yugo 12AX7A tubes? Anyone have good luck with those ? How do
they compare to the Sovteks ?
-Jaz
-----------== Posted via Deja News, The Discussion Network ==----------
http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
Ted A. Breaux
j...@gwis.com wrote in message <73h9bk$vrf$1...@nnrp1.dejanews.com>...
>Mojo Musical Supply has been out of Sovtek 12AX7WB tubes for quite a while
so
>I'm looking for alternatives. In the past I've bought NOS Phillips JAN
>12AX7s. These are more money of course and even though they sound great,
>there seems to be a high percentage of them that are microphonic, right out
>of the box.
>
>What about the Yugo 12AX7A tubes? Anyone have good luck with those ? How do
>they compare to the Sovteks ?
IMHO, none of the Sovtek preamp tubes sound all that good to me. They seem
to be either a little too dark, a little too brittle, and/or have low gain,
depending on which you get. The type of amp you use will affect the type of
tube you should buy. The Ei (Yugo) tubes have a great sound, but some are a
little microphonic. Some suppliers will weed these out for you in advance.
They deliver incredible harmonics in Fender, Vox,and other vintage type
amps. The Tesla ECC83 is a well balanced, fine sounding tube which sounds
nice in Marshalls, etc., is quiet, and is a safe buy.
Ted B.
jeffjean
j...@gwis.com wrote:
> Mojo Musical Supply has been out of Sovtek 12AX7WB tubes for quite a while so
> I'm looking for alternatives. In the past I've bought NOS Phillips JAN
> 12AX7s. These are more money of course and even though they sound great,
> there seems to be a high percentage of them that are microphonic, right out
> of the box.
>
> What about the Yugo 12AX7A tubes? Anyone have good luck with those ? How do
> they compare to the Sovteks ?
>
Ericb
> Mojo Musical Supply has been out of Sovtek 12AX7WB tubes for quite a while so
> I'm looking for alternatives. In the past I've bought NOS Phillips JAN
> 12AX7s. These are more money of course and even though they sound great,
> there seems to be a high percentage of them that are microphonic, right out
> of the box.
>
> What about the Yugo 12AX7A tubes? Anyone have good luck with those ? How do
> they compare to the Sovteks ?
>
> -Jaz
Personally, I've learned to almost hate the Sovteks.. They cause a popping
noise in many of my amps when the amp is turned on, and have been very
inconsistent in sound quality.....So, from there....I've only owned 3 of
the Yugo EI 12ax7's and they've been great. I hear there is a huge
inconsistency rate in them though, so it might be a good idea to buy
Ruby's EI tubes since they're tested. I think Andy Ruhl sells them for
8.00-9.00 ea.......I also owned 3 of the chinese Silver Specials that Mike
Kropotkin (KCA) was selling ...they're great but he's sold out. I think
Lord Valve might still have some for sale......My favorite at this point
are RCA 12ax7/7025's ...They're awesome but will run probably about 25.00
each. .........Other than those, The Sovtek 12ax7wxt+ has been fine for
me, but I've heard mixed results....Enjoy.
ERIC
Gil Ayan
>What about the Yugo 12AX7A tubes? Anyone have good luck with those ? How do
>they compare to the Sovteks ?
>
>-Jaz
I share the feeling most of the guys around here have about these EI Yugo
tubes: they can sound very nice, and for the money, you can buy say a batch
of 10 and weed out the 5 you need for your Fender and still come out way
ahead moneywise - although I'm not sure what their retail price is.
Gil
Fred Whitlock
Yes, the JJ/Tesla ECC83 / 12AX7 has a good reputation for reliability and
sound. Another sleeper is the military 5751-a great performer for a small
price. Take care.
Fred
AudioNow!
http://www.audionow.com
Teleologist
> Mojo Musical Supply has been out of Sovtek 12AX7WB tubes for quite a while so
> I'm looking for alternatives. In the past I've bought NOS Phillips JAN
> 12AX7s. These are more money of course and even though they sound great,
> there seems to be a high percentage of them that are microphonic, right out
> of the box.
>
> they compare to the Sovteks ?
>
> -Jaz
>
from New Sensor(which I don't believe are screened) have had like 1 bad
tube out of 20 or 25.
If by microphonic, you mean that they make a noise when you tap 'em,
they do that because the plate spacers are in direct contact with the
glass(on Sovteks & Chinese tubes the plates are isolated by extra
spacers). Ringing or squealing when you tap 'em with the volume cranked
means they're microphonic.
Jack A. Zucker
Fred Whitlock wrote in message <73i3ur$mp7$1...@news0-alterdial.uu.net>...
>
>Yes, the JJ/Tesla ECC83 / 12AX7 has a good reputation for reliability and
>sound. Another sleeper is the military 5751-a great performer for a small
>price. Take care.
>
>Fred
But Fred,
The 5751 is closer in output to an 12AT7, not a 12AX7.
-Jaz
--
Jack A. Zucker (Jaz)
Cleveland, OH USA
E-mail: j...@gwis.com
Check out my jazz guitar webpage:
Web: http://w3.gwis.com/~jaz
Lord Valve
>
>Mojo Musical Supply has been out of Sovtek 12AX7WB tubes for quite a
while so
>I'm looking for alternatives. In the past I've bought NOS Phillips JAN
>12AX7s. These are more money of course and even though they sound
great,
>there seems to be a high percentage of them that are microphonic,
right out
>of the box.
>
>What about the Yugo 12AX7A tubes? Anyone have good luck with those ?
How do
>they compare to the Sovteks ?
>
>-Jaz
Lord Valve Speaketh:
If you think Philips NOS are microphonic,
wait 'til you try the Yugos. Check out
the Teslas, they kick ass.
Lord Valve
Visit my website: http://www.freeyellow.com/members2/lord-valve/
Good tube FAQ for newbies. Click the e-mail link and request a
tube catalog. I specialize in top quality HAND-SELECTED NOS and
current-production vacuum tubes. Good prices, fast service.
TONS of gear and parts in stock...let's DEAL!
"Ninety percent of everything is CRAP." - Sturgeon's Law
Lord Valve
<jeff...@mindspring.com> writes:
>
>Try Ruby STR-7025's
There ain't no more.
Lord Valve
Visit my website: http://www.freeyellow.com/members2/lord-valve/
Good tube FAQ for newbies. Click the e-mail link and request a
tube catalog. I specialize in top quality HAND-SELECTED NOS and
current-production vacuum tubes. Good prices, fast service.
TONS of gear and parts in stock...let's DEAL!
"I got the chop...I'll never get popped." - Tower of Power
Fred Whitlock
Yes, but it's still an effective substitute for the 12AX7 that many people
like. I have several customers who use it regularly as a 12AX7 preamp and
think a lot of it. Good listening.
Fred
AudioNow!
http://www.audionow.com
Jack A. Zucker
>>But Fred,
>>
>>The 5751 is closer in output to an 12AT7, not a 12AX7.
>>
>>-Jaz
>
>like. I have several customers who use it regularly as a 12AX7 preamp and
>think a lot of it. Good listening.
I disagree. In a guitar amp, particularly a Marshall, you'd have poor
performance running a 5751 anywhere in the amp. In a Fender, you'd not want
a 5751 anywhere except the reverb driver or phase inverter.
However, the 5751 makes a great sub for an AT-7
-Jaz
Ericb
<j...@gwis.com> wrote:
Geez, I've agreed with JAZ on his last 3 posts I've read.....Oh well, I've
read quite abit on the net about sustituting 5751's for 12ax7's but each
time I've tried it in the preamp positions in my amps I felt the change
was for the worse instead of the better...I am using a GE 5751 in my 1970
Twin for the reverb driver though and it sounds great.
ERIC
Danny Russell
The only caution about using the 5751 as a silverface reverb driver, is
the excess plate dissapation which I'm almost certain must be 3-4 times
what the book specs-out as it's maximun rating. So it may go down kinda
fast. -Danny
Lord Valve
writes:
Lord Valve Speaketh:
For a reverb driver in a Fender, check to see that the cathode
resistor is 2.2K. Anything lower and the tube will fry. I've
used 5751s for phase inverters in Marshalls with good results.
As with any substitution, the *only* way to tell if you're
going to like it is cram it in the hole and jam some. If you
like it, fine. If not, they don't cost all that much, so you
haven't lost anything worth crying over.
Lord Valve
Visit my website: http://www.freeyellow.com/members2/lord-valve/
Good tube FAQ for newbies. Click the e-mail link and request a
tube catalog. I specialize in top quality HAND-SELECTED NOS and
current-production vacuum tubes. Good prices, fast service.
TONS of gear and parts in stock...let's DEAL!
"I'm not an asshole, but I *play* one on the Internet." - Lord Valve
Sonic Surgery
Lord Valve wrote in message <73igkr$j...@dfw-ixnews9.ix.netcom.com>...
>In <365C4F59...@mindspring.com> jeffjean
><jeff...@mindspring.com> writes:
>>
>>Try Ruby STR-7025's
>
>
>There ain't no more.
What? You're out of 'em? Or are you just saying they're out of production?
I've got only 8 left. $15 a pop.
ed blum
>
>Lord Valve
>Visit my website: http://www.freeyellow.com/members2/lord-valve/
>Good tube FAQ for newbies. Click the e-mail link and request a
>tube catalog. I specialize in top quality HAND-SELECTED NOS and
>current-production vacuum tubes. Good prices, fast service.
>TONS of gear and parts in stock...let's DEAL!
>
Tony Taliaferro
Ericb wrote:
> In article <the72.31906$eD6....@news1.giganews.com>, "Jack A. Zucker"
> <j...@gwis.com> wrote:
>
> > Fred Whitlock wrote in message <73j178$8ao$1...@news0-alterdial.uu.net>...
> > >>But Fred,
> > >>
> > >>The 5751 is closer in output to an 12AT7, not a 12AX7.
> > >>
> > >>-Jaz
> > >
> > >Yes, but it's still an effective substitute for the 12AX7 that many people
> > >like. I have several customers who use it regularly as a 12AX7 preamp and
> > >think a lot of it. Good listening.
> >
> >
> > I disagree. In a guitar amp, particularly a Marshall, you'd have poor
> > performance running a 5751 anywhere in the amp. In a Fender, you'd not want
> > a 5751 anywhere except the reverb driver or phase inverter.
> >
> > However, the 5751 makes a great sub for an AT-7
> >
> > -Jaz
>
> Geez, I've agreed with JAZ on his last 3 posts I've read.....Oh well, I've
> read quite abit on the net about sustituting 5751's for 12ax7's but each
> time I've tried it in the preamp positions in my amps I felt the change
> was for the worse instead of the better...I am using a GE 5751 in my 1970
> Twin for the reverb driver though and it sounds great.
> ERIC
I'm using a 5751 in my homebrew champ/princeton tweed clone. Very smooth and
sweet. Not for the bright Marshall sound connoisseurs however. They impart a
dark (good) tone to the amp. Still readily available and cheap.
Lord Valve
<bowlin...@worldnet.att.net> writes:
>
>
>Lord Valve wrote in message <73igkr$j...@dfw-ixnews9.ix.netcom.com>...
>>In <365C4F59...@mindspring.com> jeffjean
>><jeff...@mindspring.com> writes:
>>>
>>>Try Ruby STR-7025's
>>
>>
>>There ain't no more.
>
>What? You're out of 'em? Or are you just saying they're out of
production?
>I've got only 8 left. $15 a pop.
>
>ed blum
LV: I mean I don't have any. Can't get any. I've got a few
I've agreed to hold for people, but unless someone changes his
mind, I don't have any left to sell.
Marc Ferguson
>
> In <365C4F59...@mindspring.com> jeffjean
> <jeff...@mindspring.com> writes:
> >
> >Try Ruby STR-7025's
>
> There ain't no more.
I've got some for sale.
I'm not hoarding them.
Marc Ferguson
>
> Lord Valve (detr...@ix.netcom.com) wrote:
>
> : There ain't no more.
>
> Hey, doesn't this automatically make them "vintage?"
>
> I'll sell the couple I got lying around here for... oh, let's see.... how
> about $50 each?
>
> <G>
>
> Jas.
>
> -------------------------
> James Andrews
> Philadelphia, PA
> Remove the XX
Hey Jas...I've got 30! i can finally get a new top on the Goat!
Dan Stanley
L'Entarteur wrote in message <73usr9$klj$1...@netnews.upenn.edu>...
>Marc Ferguson (ferg...@home.com) wrote:
>: Hey Jas...I've got 30! i can finally get a new top on the Goat!
Hey, I took the top off that goat on purpose, and my wives have been
particularly fertile because of it. Don't you DARE.
SDan
Marc Ferguson
getl...@my-dejanews.com
never had any microphonic problems with the one's I've gotten.
--
"Blues ain't nothin but a good man feelin bad,
thinkin about the woman he once was with..."
Marc Ferguson
Jean-Michel Gras
inverter is a ruby 7025). The tone is *incredible* with my strat: i now can be as
nasty as i want, the amp stays smooth. There's always some compression in the tone
and the overall volume is lower than with a 12ax7. The people testing my amp are
*amazed* how good and sweet this amp is now.
>
mr_knowital
one is European numbering codes & the other is USA... In actual fact
the 12AX7s were used back in WW2 on the onboard air craft bomber
radios, thats what the letter 'A' represents...
Now the real question... Am I telling the truth or did I make this up
???
Alan Thompson
From what I understand, later 12ax7 versions eliminated the difference between 12ax7
and 7025 (12ax7a).
A.T.
Ned Carlson
>There is no electronoc or sonic difference between a 12AX7 & a 7025,
Assuming they're about the same vintage & manufacturer, OK.
>one is European numbering codes & the other is USA...
Naw..ECC83 is European.
In actual fact
>the 12AX7s were used back in WW2 on the onboard air craft bomber
>radios, thats what the letter 'A' represents...
The oldest reference to 12AX7 I have is an RCA "Tentative Data"
sheet dated Sept 15, 1947.
The A version has a controlled-warmup filament..that's all.
>
>Now the real question... Am I telling the truth or did I make this up
>???
Looks like most of it you made up.
Ned Carlson Triode Electronics "where da tubes are!"
2225 W Roscoe Chicago, IL, 60618 USA
ph 773-871-7459 fax 773-871-7938
12:30 to 8 PM CT, (1830-0200 UTC) 12:30-5 Sat, Closed Wed & Sun
http://www.triodeel.com
Your Start Page for Tube and Tube Amp info on the net...
http://www.triodeel.com/tlinks.htm
leo...@nospam.com
You made it up dude.
12AX7A's were used in Russion bombers during the cold war to guard
agains nuclear pulse. They re-named them 7025's because they sorted
them for low noise.
(I can make shit up too!)
>Mr Knowital wrote:
>There is no electronoc or sonic difference between a 12AX7 & a 7025,
>one is European numbering codes & the other is USA... In actual fact
>the 12AX7s were used back in WW2 on the onboard air craft bomber
>radios, thats what the letter 'A' represents...
>
>Now the real question... Am I telling the truth or did I make this up
>???
>
>On Thu, 03 Dec 1998 10:58:21 +0100, Jean-Michel Gras
><jmg...@nortel.com> wrote:
>
>>I put 2 months ago a 5751 as the first preamp tube in my pro junior (the phase
>>inverter is a ruby 7025). The tone is *incredible* with my strat: i now can be as
>>nasty as i want, the amp stays smooth. There's always some compression in the tone
>>and the overall volume is lower than with a 12ax7. The people testing my amp are
>>*amazed* how good and sweet this amp is now.
>>
>>
>>>
>>
>
Your mouse curser has moved:
Please reboot windows for this change to take effect:
Lord Valve
>
>There is no electronoc or sonic difference between a 12AX7 & a 7025,
>one is European numbering codes & the other is USA... In actual fact
>the 12AX7s were used back in WW2 on the onboard air craft bomber
>radios, thats what the letter 'A' represents...
>
>Now the real question... Am I telling the truth or did I make this up
>???
Lord Valve Speaketh:
Troll. You made it up. Any tube that is revised or upgraded gets an
"A" (or B, or C, etc.) added to the original number. It doesn't have
anything to do with airplane parts. Also, in the old days, a 7025
*was* diferent from a 12AX7. Had something to do with grid-wire
spacing, or the grid frame. (I can't remember, exactly. Ned probably
can, though.) The European number for this tube is ECC83...both
12AX7 and 7025 are American numbers. Crawl back in your hole.
ark
>There is no electronoc or sonic difference between a 12AX7 & a 7025,
>one is European numbering codes & the other is USA... In actual fact
>the 12AX7s were used back in WW2 on the onboard air craft bomber
>radios, thats what the letter 'A' represents...
>
>Now the real question... Am I telling the truth or did I make this up
>???
Yeah the numbers mean they can be used interchangably but if you think
they all sound the same then you have lousy ears... different brands
of the same tube type can sound really different.
Al
Ned Carlson
>Lord Valve Speaketh:
Also, in the old days, a 7025
>*was* diferent from a 12AX7. Had something to do with grid-wire
>spacing, or the grid frame. (I can't remember, exactly. Ned probably
>can, though.)
Ye Olde RC-26 says "This type is identical with miniature type
12AX7A except that it has a controlled equivalent noise and
hum characteristic."
Telefunken made a "frame-grid" 12AX7, the Tesla/JJ 12AX7
is a copy of it. Frame-grid tubes have a grid that looks like
a ladder, and each triode section has *two* grids and *two*
anodes but a signle cathode, the way they're usually made.
>Visit my website: http://www.freeyellow.com/members2/lord-valve/
Greg Jones
tubes or power amp tubes?
Mark Garvin
>You made it up dude.
>12AX7A's were used in Russion bombers during the cold war to guard
>agains nuclear pulse. They re-named them 7025's because they sorted
>them for low noise.
>(I can make shit up too!)
>>Mr Knowital wrote:
>>[something else entirely]
>Your mouse curser has moved:
>Please reboot windows for this change to take effect:
I like that! <g>
The 7025 was an American 'low microphonic' version of the 12ax7.
Not to say that they sounded better, but that was their claim to fame.
There was also a European tube: ECC83, which usually did sound better
than the garden variety 12ax7. OK, 'sound better' is arbitrary.
These days, all bets are off, as everyone just picks numbers
they think look good.
I like the Russian bomber version better, so I'm probably going with
that in the future. Or maybe they were designed to power washing
machines and toasters on the Mir space station. Yeah, forget that
other stuff. I'm going with the space appliance thing.
MG
Danny Russell
>
>
> The 7025 was an American 'low microphonic' version of the 12ax7.
> Not to say that they sounded better, but that was their claim to fame.
> There was also a European tube: ECC83, which usually did sound better
> than the garden variety 12ax7. OK, 'sound better' is arbitrary.
Also the 7025 had a coiled heater element to help cancel out most it's
radiated magnetic hum. -Danny
leo...@nospam.com
power amp tubes
Not A Speck Of Cereal
tunes
leo...@nospam.com wrote:
[] power amp tubes
[]
[] >ujo...@pclprod.meaddata.com (Greg Jones) wrote:
[]
[] >Which makes more of a contribution to the tone of a tube amp, preamp
[] >tubes or power amp tubes?
----
"It is better to debate a question without answering it than to answer a question without debating it."
-- Mark Twain
..............................................................
Remove X's from my email address above to reply
chri...@microsoft.com -- Seattle, WA.
[These opinions are personal views only and only my personal views]
Jonathan Krogh
I would say that power tubes ( and their configuration) define the main tone
and texture that the amp would have, and different preamp tubes just sort of
change the EQing a bit.
Not A Speck Of Cereal wrote in message <3685357c.80813253@newsvr>...
leo...@nospam.com
Who is agreeing to who here? I am missing posts I think...
I'd say the power tranny has a lot to do with it and it is linked very
closely to the power tubes and power supply. Also the speaker.
I'd also say that the preamp tubes are of very little importance to
the crunch we all like. I'd say preamp tubes are more subtile in their
effect.
For example - who would describe a BF as a SS amp sound just because
it had a SS fuzzbox? That is most definately a preamp!!! In fact you
could pull a 12ax7 and jumper it and the amp would work with the fuzz
as the only preamp. And it would still crunch I bet! The techs know
what I mean if the players don't...
ark
<jo...@accglobal.net> wrote:
>I disagree,
>I would say that power tubes ( and their configuration) define the main tone
>and texture that the amp would have, and different preamp tubes just sort of
>change the EQing a bit.
Some people would call EQ tone control... it's semantics I guess.
I think it depends on whether or not you run your amp hard or not. If
you play lower volume clean settings then the pre amp tubes will make
more difference, but if you push the amp all the time you will hear
more of the power tubes' character.
Al
ark
>
>Who is agreeing to who here? I am missing posts I think...
>
>I'd say the power tranny has a lot to do with it and it is linked very
>closely to the power tubes and power supply. Also the speaker.
>
>I'd also say that the preamp tubes are of very little importance to
>the crunch we all like.
Don't assume that every one runs their amp on 7 or 10 and necessarily
likes "crunch" other than in their breakfast cereal. I can hear the
difference easily between various 12AX7s.
Al
Polfus
>From: a...@aa.net (ark)
>Date: Fri, Dec 11, 1998 02:57 EST
>Message-id: <3671d005...@news.aa.net>
Yup. And I think that the preamp stage is *critical* to a great crunch tone.
Peace,
Polfus
leo...@nospam.com
I didnt say the preamp had no effect - the guy wanted to know what
gave the most effect. And you clipped my logical reply...
For everyone who says he can hear this and he can hear that - I'd love
to administer a double blind test. If you go by memory of one over the
other and not a side by side test - you may be deluding yourself.
People do not have accurate long term memory for detailed comparisons.
I've fooled myself lots of times - thinking there was a great
differance when it was only what I thought I wanted to hear. I learned
this the hard way when I scrapped a speaker in favor of another and
some long term listening proved me wrong. I couldnt A -B compare them
at the time, but the first turned out to be better.
Rowan
concentrate on. Some folks concentrate on their pedals and the amp just
sits there idling, others use small amps cranked.
My feeling is after an effort on the guitar and after the link of a cord
(makes a difference) the pre-ampers are the first thing (more or less) to
see the signal all else follows and is a result of what occurs in that
pre-amper. Peace Chris
Dan Stanley
Mic Cullen wrote in message <36737f34...@news.omen.net.au>...
>mga...@panix.com (Mark Garvin), far, far away from here, appears to have
>written:
>
>[snips]
>
>>I like the Russian bomber version better, so I'm probably going with
>>that in the future. Or maybe they were designed to power washing
>>machines and toasters on the Mir space station. Yeah, forget that
>>other stuff. I'm going with the space appliance thing.
>
>around to chrome plate yer sink again....
>
>have a good one,
No, his sink is done, now I'm working on his funny looking dog.
SDan
Mic Cullen
written:
[snips]
>I like the Russian bomber version better, so I'm probably going with
>that in the future. Or maybe they were designed to power washing
>machines and toasters on the Mir space station. Yeah, forget that
>other stuff. I'm going with the space appliance thing.
Got any of those vintage Maytag EL-84's, Garvcock? If not, I'll send Dann
around to chrome plate yer sink again....
have a good one,
Stevie DejaToobjerkFAQNaziMi©