More tube questions
heiney9
Posts: 25,165
This what I know for sure;
12AT7 has an equivalent substituite of a 5965 it has lower Mu of 47 compared to the 12AT7's 60. I also know the 5965 is almost an exact equivalent to 12AV7.
Now the question is can a 12AV7 be used in place of a 12AT7? The 5965 can be used in both applications but I'm not sure if the the 12AV7 can be used in place of a 12AT7 or visa versa?
Anyone know for sure. Many tube sellers on ebay list them as both, and while this ok if you are looking for a 12AV7, it's confusing if you are looking for a 5965 to use in place of a 12AT7.
Are you confused yet? This is what I'm basing my question (from Brent Jesse's site)
The 12AT7 is a high-frequency twin triode in a small 9-pin miniature glass package. This tube has a mu factor of 60, as compared to the higher gain 12AX7 with a factor of 100, and the 12AU7, with a mu of only 20. As you can see, it shares similar pin connections with it's cousins, but these tubes are not interchangeable. The 12AT7 is found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier. They also turn up in line and microphone preamplifiers, musical instrument amps, and vacuum tube equipped recording equipment. By their design, they are inherently low noise, making them a good choice for these applications.
The question is.........................does the above apply for the 12AV7 or is it an exact equivalent to the 5965?
TIA for any light you can shed on the subject. RCA triple mica black plate 12AV7's are fairly cheap and a damn nice sounding tube. So that's why I'm asking.
H9
12AT7 has an equivalent substituite of a 5965 it has lower Mu of 47 compared to the 12AT7's 60. I also know the 5965 is almost an exact equivalent to 12AV7.
Now the question is can a 12AV7 be used in place of a 12AT7? The 5965 can be used in both applications but I'm not sure if the the 12AV7 can be used in place of a 12AT7 or visa versa?
Anyone know for sure. Many tube sellers on ebay list them as both, and while this ok if you are looking for a 12AV7, it's confusing if you are looking for a 5965 to use in place of a 12AT7.
Are you confused yet? This is what I'm basing my question (from Brent Jesse's site)
The 12AT7 is a high-frequency twin triode in a small 9-pin miniature glass package. This tube has a mu factor of 60, as compared to the higher gain 12AX7 with a factor of 100, and the 12AU7, with a mu of only 20. As you can see, it shares similar pin connections with it's cousins, but these tubes are not interchangeable. The 12AT7 is found in many high fidelity applications, as each triode section in normal use operates as a class A amplifier. They also turn up in line and microphone preamplifiers, musical instrument amps, and vacuum tube equipped recording equipment. By their design, they are inherently low noise, making them a good choice for these applications.
The question is.........................does the above apply for the 12AV7 or is it an exact equivalent to the 5965?
TIA for any light you can shed on the subject. RCA triple mica black plate 12AV7's are fairly cheap and a damn nice sounding tube. So that's why I'm asking.
H9
"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
Post edited by heiney9 on
Comments
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I had a similar situation/idea with one of my amps,,long story short,,you might wanna' call the Manufacturer,,I did with Quicksilver,, Mike told me that under no circumstances should I change the input tube,,in my case is was an AX7 that I was playing with,,can't remember why though. I would think that if the ONLY difference is the gain factor, then you should be able to sub it. Anyway,, let us know what you find. Good luck.JC approves....he told me so. (F-1 nut)
