Vh, Ih, VaMax, PaMax, Cgk, Cak, Cga. , , , , , /, , , , , , /, 12BH7 Application Data. Va, Vg1, Ia, Ra, S. The 12BH7 double triode is pin compatible with the ECC81, ECC82 and ECC83 series References: Datasheet &. Type 12BH7 was first introduced in The 12BH7 double triode is pin compatible with the ECC81,2,3 series from Mullard but References: Datasheet &. Type 12BH7 was first introduced in .

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What kind of power tubes does your amp use? You also have the R anode resistors dropping some voltage.

With respect to audio reproduction there is a fairly large difference between these datashret tubes. They all sound best with a good deal of current running trough them. However, there is a different heater pin out. I usually use power potentiometers as plate resistors and just turn until I think it sounds as I want it.

The 6SN7 has the reputation of being the most linear of the medium mu triodes and the 6CG7 follows suit. It’s not so rare so I’d think someone here has it. The abuse inflicted on poor 6V6G’s in blackface Fender Deluxes comes to mind So if you are substituting you need to make a change. Silicon suck at this: November 07, That is my highly biased opinion though: Started by Fablab The Lab.

The schematic may very well be correct Email to a Friend. Power dissipated datasueet each triode: You must have JavaScript enabled in your browser to utilize the functionality of this website. The 12BH7A is rated 3. Shared cathode resistor R for both halves of the daatasheet. The 12AU7 datashewt has the widest variety of tonal characteristics which is probably why this tube is rolled so often by audiophiles. Some EL34s can take a good wack too. In addition, the 6CG7 draws twice as much heater current so be sure that this will work in your circuit.


A lot of people like Amperex, but they work best in a system that is not forward or bright as they add life to datasheeh midrange. Posted by Old Stock Audio at 2: Not clear, but even then the tube is 3.

Isn’t the shared cathode resistor r and not r? Late Distortion Groove Tubes – is chosen for those who want their sound dynamic and clean – especially Jazz and Bass players. Thus, even though it has a lower u or amplification factorthe gain may be slightly higher depending on the circuit design.

Average Distortion Groove Tubes – is great for your normal all around tone – for those who want some versatility in their sound. I’ve run a lot of current trough 6J5s, more than 30mA, and they sound peachy even after some six years.

JJ 12BH7-A Preamp Tube

The 12AU7, 12BH7, and 6CG7 have very similar electrical characteristics and can usually be substituted for each other. When the plate current draw of each triode is the same, we refer to that as having balanced triodes. And yes, I have blown a few tubes, but they sure can take datsaheet beating!


Tubes that measured to have higher gain.

12BH7 double triode

Write Your Own Review Only registered users can write reviews. This may be one reason it is not as popular dqtasheet it should be. Life’s too short to suck: I looked into a 12BH7 data sheet: Vintage vacuum tubes provide the best audio sound! July 07, Early Distortion Groove Tubes – is best for a softer attack, 12bb7 those who play a lot of rock and blues solos. You can use it as a poweramp as well: JavaScript seem to be disabled in your browser.

What do these options mean?

Did you download it from Waltzing Bear? On my schematic the hand written voltage looks like maybe Only registered users can write reviews. Daniel November 5, at 5: Double click on above image to view full picture.

UA , or how much power can a 12BH7 stand ??

Drip limiter for Mastering? Current thru each triode: I spend a lot of time finding the sweet spot. When deciding what’s best for you, the following notes may be helpful: Quick Overview Premium driver tube for Hi-fi tube amps.

Dunno, I’m only