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#1
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Looking for 12AX7A tubes
With about 40 hours on a tubed microphone pre-amp I'm
now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? |
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#2
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Looking for 12AX7A tubes
On Fri, 9 Apr 2004 15:51:16 -0400, "Powell"
wrote: With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try he http://www.pentalaboratories.com/pro...12AX7 A%2ENOS Mullards would be better, of course, but they'll cost an arm and a leg. Here are some other possibilities: http://cgi.ebay.com/ws/eBayISAPI.dll...9306 564&rd=1 http://cgi.ebay.com/ws/eBayISAPI.dll...9747 730&rd=1 http://cgi.ebay.com/ws/eBayISAPI.dll...9747 947&rd=1 This looks good as well. Almost as good as Mullards: http://cgi.ebay.com/ws/eBayISAPI.dll...72215 30&rd=1 Basically, what I'm saying is that you can search for 12AX7s on eBay, I guess. Also, that's a common tube, so you might be able to find NOS GEs and the like if you look around locally. Sometimes you can find an old-timey TV repair shop that still has tubes floating around. |
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#3
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Looking for 12AX7A tubes
Powell wrote:
With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro |
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#4
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Looking for 12AX7A tubes
"dave weil" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Mullards would be better, of course, but they'll cost an arm and a leg. "Would be better"... in what regard? Also, that's a common tube, so you might be able to find NOS GEs and the like if you look around locally. Sometimes you can find an old-timey TV repair shop that still has tubes floating around. Finding vendor sources for tubes isn't the problem. It's the brand name I'm asking about in regards to the specific application. |
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#5
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Looking for 12AX7A tubes
"Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. |
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#6
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Looking for 12AX7A tubes
On Sat, 10 Apr 2004 11:51:15 -0400, "Powell"
wrote: "dave weil" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Mullards would be better, of course, but they'll cost an arm and a leg. "Would be better"... in what regard? I think that they're considered to be longer lasting, for instance. Depending on the application, they are usually considered to be the best in terms of microphonics as well. The person to ask would be Kevin Deal. He's at: http://www.upscaleaudio.com I forgot to put that link into the previous post. He's probably the guy who knows the most about matching tubes with specific gear. Also, that's a common tube, so you might be able to find NOS GEs and the like if you look around locally. Sometimes you can find an old-timey TV repair shop that still has tubes floating around. Finding vendor sources for tubes isn't the problem. It's the brand name I'm asking about in regards to the specific application. Well, since you didn't bother to list the specific component, I'm not sure what your beef is here. The reason I mentioned this is that you can get tubes from those sources usually a lot cheaper than buying them from "tube vendors" and so you can afford to experiment for yourself. Those that you don't like can be disposed of on eBay. |
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#7
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Looking for 12AX7A tubes
Dave Weil wrote:
On Sat, 10 Apr 2004 11:51:15 -0400, "Powell" wrote: "dave weil" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Mullards would be better, of course, but they'll cost an arm and a leg. "Would be better"... in what regard? I think that they're considered to be longer lasting, for instance. Depending on the application, they are usually considered to be the best in terms of microphonics as well. The person to ask would be Kevin Deal. He's at: http://www.upscaleaudio.com I forgot to put that link into the previous post. He's probably the guy who knows the most about matching tubes with specific gear. Also, that's a common tube, so you might be able to find NOS GEs and the like if you look around locally. Sometimes you can find an old-timey TV repair shop that still has tubes floating around. Finding vendor sources for tubes isn't the problem. It's the brand name I'm asking about in regards to the specific application. Well, since you didn't bother to list the specific component, I'm not sure what your beef is here. The reason I mentioned this is that you can get tubes from those sources usually a lot cheaper than buying them from "tube vendors" and so you can afford to experiment for yourself. Those that you don't like can be disposed of on eBay. I've purchased Mullard 12AX7 tubes from Kevin Deal at Upscale Audio. I use them in both my tubed DAC, a California Audio Labs Alpha, and also in my Conrad Johnson PV-12 preamplifier, In both cases, the tubes have performed very well, and have lasted a long time. I found Mr. Deal to be very professional, and as Dave says, very knowledgable about what tubes seem to work best in different applications. He also usually has a large stock of just about every type of tube you might be looking for. Bruce J. Richman |
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#8
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Looking for 12AX7A tubes
dave weil said:
Basically, what I'm saying is that you can search for 12AX7s on eBay, I guess. I'd strongly recommend that one buys tubes NOT from Ebay. Practices like selling old, worn out tubes with new logos and freshly golded pins are not that unusual. Go with a reputable vendor like Ned Carlson www.triodeelectronics.com or perhaps Willie "Lord Valve" if you can stand his attitude :-) These guys don't just sell, but can also advise you better than anyone in this newsgroup, including myself. BTW Powell, 12 AX7s in a microphone amp, are you seriously looking for noise and microphony? :-) In any case, when the design calls for AX7, try 7025 RCA. For a microphone amp, a better choice would be EF86 in triode, IMHO. -- Sander deWaal Vacuum Audio Consultancy |
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#9
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Looking for 12AX7A tubes
Powell wrote:
"Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. |
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#10
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Looking for 12AX7A tubes
Arny said:
Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. Boon |
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#11
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Looking for 12AX7A tubes
Marc Phillips wrote:
Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? |
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#12
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Looking for 12AX7A tubes
Arny said:
Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? I know what happened to you in RAHE. That's a lot funnier, I bet. Boon |
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#13
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Looking for 12AX7A tubes
Marc Phillips wrote:
Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. |
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#14
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Looking for 12AX7A tubes
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#15
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Looking for 12AX7A tubes
On Sun, 11 Apr 2004 17:07:24 -0400, "Arny Krueger"
wrote: Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. Ahhh, but he *did* point out what happened to you at RAHE. Pretty much banned. Now *that's* funny! |
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#17
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Looking for 12AX7A tubes
dave weil wrote:
On Sun, 11 Apr 2004 17:07:24 -0400, "Arny Krueger" wrote: Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. Ahhh, but he *did* point out what happened to you at RAHE. non sequitur |
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#18
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Looking for 12AX7A tubes
From: "Arny Krueger"
Date: 4/11/2004 5:25 PM Pacific Standard Time Message-id: S888Wheel wrote: From: "Arny Krueger" Date: 4/11/2004 2:07 PM Pacific Standard Time Message-id: Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. I guess that makes the world's population save for a handfull of people ignorant. Is your perspective so skewed now that you think there is something wrong with not knowing the goings on for a particular Usenet group? non sequitur Wrong but amusing. Why the sudden meltdown? |
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#19
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Looking for 12AX7A tubes
Arny said:
Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. no response from Krueger related to RAHE total defeat noted Boon |
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#20
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Looking for 12AX7A tubes
Arny said:
dave weil wrote: On Sun, 11 Apr 2004 17:07:24 -0400, "Arny Krueger" wrote: Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. Ahhh, but he *did* point out what happened to you at RAHE. non sequitur Post ignored. Boon |
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#21
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Looking for 12AX7A tubes
On Sun, 11 Apr 2004 20:25:57 -0400, "Arny Krueger"
wrote: dave weil wrote: On Sun, 11 Apr 2004 17:07:24 -0400, "Arny Krueger" wrote: Marc Phillips wrote: Arny said: Marc Phillips wrote: Arny said: Powell wrote: "Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. You, too. You don't know what happened to Powell over in RAP, do you? no response from Phillips related to RAP Ignorance noted. Ahhh, but he *did* point out what happened to you at RAHE. non sequitur Nope. Look it up. |
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#22
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Looking for 12AX7A tubes
"Arny Krueger" wrote With about 40 hours on a tubed microphone pre-amp I'm now interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. My first thoughts would be: Sovtek, RAM or Jan Philips NOS. Any empirical suggestions? Try rec.audio.tubes or rec.audio.pro "rec.audio.pro".... hehehe, dweebs. IOW, a bunch of smart guys who figured you out for the fraud you are in almost no time at all. Sooo... what’s your excuse, mr. Fraud? |
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#23
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Looking for 12AX7A tubes
"Sander deWaal" wrote Go with a reputable vendor like Ned Carlson www.triodeelectronics.com Thank you. or perhaps Willie "Lord Valve" if you can stand his attitude :-) I know Willie... thanks, I'll pass  .These guys don't just sell, but can also advise you better than anyone in this newsgroup, including myself. BTW Powell, 12 AX7s in a microphone amp, are you seriously looking for noise and microphony? :-) I'm interested in increasing the timbre and micro-dynamics resolution particularly in the 80 to 500 Hz range. I'm looking for a similar resolution to that of my ARC pre-amp. Here's an interesting comparison of 12AX7 design types: http://store.yahoo.com/thetubestore/12ax7review.html And a description of design use: http://catalog.rell.com/scripts/SkuS...chtotal=% 2D1 Information on NOS tubes, too. http://www.soundstage.com/tubeor/tube4.htm In any case, when the design calls for AX7, try 7025 RCA. And, I understand it ECC83, which is very pricey: http://store.yahoo.com/thetubestore/12ax70ectyp.html For a microphone amp, a better choice would be EF86 in triode, IMHO. I didn't see where the EF86 was a 12AX7 substitute... are you sure it is? And it appears appears to be a pentode design. I'm leaning toward a highly sorted RAM tube because of the noise factor. Or maybe purchase both the Sovtek 12AX7LPS and Ei12AX7 types... can't justify all three purchases, unfortunately. http://www.tubeaudiostore.com/tubes.html Interesting article by Roger Modjeski on "why sound changes when you change tubes: http://store.electron-valve.com/soundandtubes.html |
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#24
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Looking for 12AX7A tubes
"Powell" said:
In any case, when the design calls for AX7, try 7025 RCA. And, I understand it ECC83, which is very pricey: http://store.yahoo.com/thetubestore/12ax70ectyp.html ECC83 is just the European nomenclature for 12 AX7. There are as many different ECCs as there are AX7s. I use the Mullard CV4004 for a phono preamp, which has to deal with similar small voltages as a mic preamp. This is a very expensive tube if you have to buy them today. I'm glad I bought some stock 15 years ago, when prices weren't skyhigh. The RCA7025 is a very silent substitute, and would be my second choice in a RIAA or mic preamp. Forget about Telefunken E83CC, they're way overhyped. Strange enough, their ECC803S is a far better tube for these purposes, it's just damned hard to find. For a microphone amp, a better choice would be EF86 in triode, IMHO. I didn't see where the EF86 was a 12AX7 substitute... are you sure it is? And it appears appears to be a pentode design. Correct, I'm talking about diy designs. This won't work in an existing amp, obviously. BTW, any pentode can be converted into a triode just by tying the screen grid to the anode. I'm leaning toward a highly sorted RAM tube because of the noise factor. Or maybe purchase both the Sovtek 12AX7LPS and Ei12AX7 types... can't justify all three purchases, unfortunately. http://www.tubeaudiostore.com/tubes.html Hmmmm.......I'm not very fond of the Sovtek 12 AX7LPS. It probably would be better to use this tube in a higher level stage such as a phase splitter in a poweramp, where its sonics are not that critical. Sadly, I don't have experience with the EI. But be aware that between the same brand and type, differences may exost that are larger than between different brands altogether. As the famous Alan Marcy (Tubegarden) already pointed out, just plug'em in and listen :-) -- Sander deWaal Vacuum Audio Consultancy |
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