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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The operating point is more important than the tube, ime.

(PDF) 12BH7-A Datasheet download

On my schematic the hand written voltage looks like maybe Quite often it’s with a lot of current. Quick Overview Premium driver tube for Hi-fi tube amps.

Try to get another copy. If you don’t want to modify the circuit and are unhappy with your 12AUthis is a good choice. Early Distortion Groove Tubes – is best for a softer attack, and those who play a lot of rock and blues solos.

You also datasheeet the R anode resistors dropping some voltage.

I spend a lot of time finding the sweet spot. Write Your Own Review Only registered users can write reviews.


GE 12BH7 Datasheet | EZ

Shared cathode resistor R for both halves of the 12BH7. I was looking at the input stage. Did datashewt download it datsheet Waltzing Bear? 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. July 07, With respect to audio reproduction there is a fairly large difference between these three tubes. Made in Russia, these premium driver tubes are compatible with 12bu7 12BH7 tube. This may be one reason it is not as popular as it should be.

When you do, we hope you will consider our vintage tube offerings at http: Life’s too short to suck: The 12AU7, 12BH7, and 6CG7 have very similar electrical characteristics and can usually be substituted for each other.

Please, log in or register. Dunno, I’m only Newer Post Older Post Home.

The schematic link at Waltzing Bear is dead, do you have another link? If you need help write me via http: The 12BH7A is rated 3.

JJ Electronic – 12BH7-A

Kein geil oder spass. There is, however, a wider variation in the sound of 12BH7s than 6CG7s, so some tube selection or rolling 12bbh7 in order. So if you are substituting you datashset to make a change. The schematic may very well be correct What kind of power tubes does your amp use?


Thus, even though it has a lower u or amplification factorthe gain may be slightly higher depending on the circuit design. So, where’s that UA schematic then? Details Medium-Mu twin triode driver tube with 3. And yes, I have blown a few tubes, but they sure can take a beating!

This is not seen in a lot of commercial gear, lotsa tube exchange: ECC8X stuff is not and not very good sounding either. Double click on above image to view full picture. You can use it as a poweramp as well: I looked into a 12BH7 data sheet: When deciding what’s best 12bbh7 you, the following notes may be helpful: Only registered users can write reviews.

Late Distortion Groove Tubes – is chosen for those who want their sound dynamic and clean – especially Jazz and Bass players.