12ax7 vs. 12at7
- Thread starter Dirtyking
- Start date
greendy123
New member
Re: 12ax7 vs. 12at7
12at7 has 60% of the gain a 12ax7 can provide.
12at7 has 60% of the gain a 12ax7 can provide.
greendy123
New member
Re: 12ax7 vs. 12at7
Here's a link I just found that explains the difference with different pre-amp tubes. http://thetubestore.com/gainfactor.html
It says in there that the power amp section works harder if you use a lower gain tube I wonder if it actually makes overdriven tones easier to achieve.
Here's a link I just found that explains the difference with different pre-amp tubes. http://thetubestore.com/gainfactor.html
It says in there that the power amp section works harder if you use a lower gain tube I wonder if it actually makes overdriven tones easier to achieve.
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STRATDELUXER97
Stratoblaster Tone Meister
Re: 12ax7 vs. 12at7
A 12AX7 has a gain factor of 100
A A12AT7 only has a gain factor of 70..
A 12AX7 has a gain factor of 100
A A12AT7 only has a gain factor of 70..
Re: 12ax7 vs. 12at7
For some reason, 12AT7 has never been a very popular tube in the first stage either with manufacturers or with swappers. I have a box of them here of various Euro/US brands and none of them sound very good in V1. 5751 or 12AY7 (or even 12AU7) work better for me...
For some reason, 12AT7 has never been a very popular tube in the first stage either with manufacturers or with swappers. I have a box of them here of various Euro/US brands and none of them sound very good in V1. 5751 or 12AY7 (or even 12AU7) work better for me...
STRATDELUXER97
Stratoblaster Tone Meister
Re: 12ax7 vs. 12at7
That's because a 12AT7 is used more as a functional tube and not as a tube in a tonal spot in amps...It's "normally" a phase inverter tube or used to drive reverb or the vibrato circuits in Fender amps...
ES350 said:
That's because a 12AT7 is used more as a functional tube and not as a tube in a tonal spot in amps...It's "normally" a phase inverter tube or used to drive reverb or the vibrato circuits in Fender amps...
Dirtyking
New member
Re: 12ax7 vs. 12at7
Awesome link bro.
I'm still a little confused if there would be any problems switching my 12at7 with a 12ax7. Like frying the circuits or ?. My head has 5 preamp tubes, all Ruby's with the 1st being a 12at7 and the others being 12ax7's.
"Edit...I'm sorry the 12at7 is actually a Phillip's tube"
Awesome link bro.
I'm still a little confused if there would be any problems switching my 12at7 with a 12ax7. Like frying the circuits or ?. My head has 5 preamp tubes, all Ruby's with the 1st being a 12at7 and the others being 12ax7's.
"Edit...I'm sorry the 12at7 is actually a Phillip's tube"
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Re: 12ax7 vs. 12at7
The preamp tube closest to the power tubes is normally the phase inverter. I'm betting the 12AT7 in question is your PI. I will often put a 12AY7 into a slot that might normally call for a 12AX7 to achieve more cleanheadroom, lower gain front end basically.
The preamp tube closest to the power tubes is normally the phase inverter. I'm betting the 12AT7 in question is your PI. I will often put a 12AY7 into a slot that might normally call for a 12AX7 to achieve more cleanheadroom, lower gain front end basically.
STRATDELUXER97
Stratoblaster Tone Meister
Re: 12ax7 vs. 12at7
A 5751 tube is another choice also with a gain factor like the 12AT7....It's been stated that SRV used these tubes for more clean headroom?
A 5751 tube is another choice also with a gain factor like the 12AT7....It's been stated that SRV used these tubes for more clean headroom?
