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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So if you are substituting you need to make a change. Made in Russia, these premium driver tubes are compatible with any 12BH7 tube. Well, it wouldn’t be the first time a tube was run outside its design center maximum in a commercial product.

Started by dalmaproductions The Lab. Also, the 6CG7 line is remarkably similar in audio performance across various manufacturers of the same vintage or age. The 6SN7 has the reputation of being the most linear of the medium mu triodes and the 6CG7 follows suit.

If you need help write me via http: Double click on above image to view full picture. Dataseet yes, I have blown a few tubes, but they sure can take a beating!


You can use it as a poweramp as well: Each triode of the preamp tube has matching gain. Started by Brian Roth Drawing Board. You also have the R anode resistors dropping some voltage. I think either the tube is more rugged than the data sheet says or the voltages are wrong on the schematic. What kind of power tubes does your amp use? The schematic may very well be correct Current thru each triode: Newer Post Older Post Home. November 07, Anonymous February 1, at 2: Some EL34s can take a good wack too.

With respect to audio reproduction there is a fairly large difference between these three tubes. There is, however, a wider variation in the sound of 12BH7s than 6CG7s, so some tube selection or rolling is in order. I’ve run a lot of current trough 6J5s, more than 30mA, and they sound peachy even after some six years. A lot of people like Amperex, but they work best in a system that is not forward or bright as they add life to the midrange.

12BH7-A Datasheet

March 12, My guess is the voltages are wrong. Some seem to take more than others, but you can be sure it’s going to shorten life. I spend a lot of dwtasheet finding the sweet spot. Quick Overview Premium driver tube for Hi-fi tube amps. On my schematic the hand written voltage looks like maybe Quite often it’s with a lot of current.


There are lots of blogs and posts about the difference between 12AU7’s so I won’t waste your time repeating everything.

Electro Harmonix 12BH7

The 12BH7 can lend a wonderful life to the tone that sounds great for jazz or vocals. November 17, But the 12BH7 is a tough little bastard. They all sound best with a good deal of current running trough them. In addition, the 6CG7 draws twice as much heater current so be datassheet that this will work in your circuit.

12BH7A-STR TAD Premium Selected (balanced)

The 12AU7, 12BH7, and 6CG7 have very similar electrical characteristics and can usually be substituted for each other. Kein geil oder spass. I looked into a 12BH7 data sheet: Try to get another copy. Please, log in or register. Email to a Friend. Vintage vacuum tubes provide the best audio sound!