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? This may be one reason it is not as popular datazheet it should be. If you don’t want to modify the circuit and are unhappy with your 12AUthis is a good choice.

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

My guess is the voltages are wrong. And yes, I have blown a few tubes, but they sure can take a beating!

Some EL34s can take a good wack too. Double click on above image to view full picture.

Medium-Mu twin triode driver tube with 3. But the 12BH7 is a tough little bastard. Each triode of the preamp tube has matching gain. Email to a Friend. Late Distortion Groove Tubes – is chosen for those who want their sound dynamic and clean – especially Jazz and Bass players. Dunno, I’m only Life’s too short to suck: Please, log in or register. Isn’t the shared cathode resistor r and not r? The 12BH7 can lend a wonderful life to the tone that sounds great for jazz or vocals.


When deciding what’s best for you, the following notes may be helpful: Started by dalmaproductions The Lab. That is my highly biased opinion though: For most circuits this should be well within the tolerances of the design, but you can ask the manufacturer to be sure. Details Medium-Mu twin triode driver tube with 3. Silicon suck at this: Only registered users can write reviews. Quick Overview Premium driver tube for Hi-fi tube amps.

12b7h must have JavaScript enabled in your browser to utilize the functionality of this website. ECC8X stuff is not and not very good sounding either. Early Distortion Groove Tubes – is best for a softer attack, and those who play a lot of rock and blues solos. You also have the R anode resistors dropping some voltage.

I spend a lot of time finding the sweet spot. Also, the 6CG7 line is remarkably similar in audio performance across various manufacturers of the same vintage or age. Power dissipated in each triode: So, where’s that UA schematic then?

12BH7 double triode | Hifi Collective

I looked into a 12BH7 data sheet: With respect to audio reproduction there is a fairly large difference between these three tubes. Started by Brian Roth Drawing Board. So if you are substituting you need to make a change. On my schematic the hand written voltage looks like maybe The 12AU7 family has the widest variety of tonal characteristics which is probably why this tube is rolled so often by audiophiles.

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When the plate current draw of each triode is the same, we refer to that as having balanced triodes. Some seem to take more than others, but you can be sure it’s going to shorten life. Write Your Own Review Only registered users can write reviews.

GE 12BH7 Datasheet

Dave Chandler November 27, at 7: The abuse inflicted on poor 6V6G’s in blackface Fender Deluxes comes to mind Well, it wouldn’t be the first time a tube was run outside its design center maximum in a commercial product. Dtasheet think either the tube is more rugged than the data sheet says or the voltages are wrong on the schematic. Drip limiter for Mastering?