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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With respect to audio reproduction there is a fairly large difference between these three tubes. Newer Post Older Post Home.
GE 12BH7 Datasheet | EZ
So if you are substituting you need to make a change. In addition, the 6CG7 draws twice as much heater current so be sure that this will work in your circuit. The 12BH7A is rated 3. Please, log in or register. Write Your Own Review Only registered users can write reviews. You can use it as a poweramp as well: 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.
Drip limiter for Mastering? Quite often it’s with a lot of current.
12BH7 double triode
Vintage vacuum tubes provide the best audio sound! Some seem to take more than others, but you can be sure it’s going to shorten life. There is, however, a wider variation in the sound of 12BH7s than 6CG7s, so some tube selection or rolling is in order. And yes, I have blown a few tubes, but they sure can take a beating! Started by dalmaproductions The Lab. 112bh7 is my highly biased opinion though: November 17, So, where’s that UA schematic then? Updates to our vacuum tube stock, audio and guitar kits, DIY parts, and completed designs will appear on this site.
Early Distortion Groove Tubes – is best for a softer attack, and those who play a lot of rock and blues solos. July 07, Started by Brian Roth Drawing Board.
12BH7A-STR TAD Premium Selected (balanced)
On my schematic the hand written voltage looks like maybe My guess is the voltages are wrong. Medium-Mu twin triode driver tube with 3.
When deciding what’s best for you, the following notes may be helpful: Late Distortion Groove Tubes – is chosen for those who want their sound dynamic and clean – especially Jazz and Bass players. I’ve run a lot of current trough 6J5s, more than 30mA, and they sound peachy even after some six years.
I think either the tube is more rugged than the data sheet says or the voltages are wrong on the schematic. The 12AU7 family has the widest variety of tonal characteristics which is probably why this tube is rolled so often by audiophiles.
What kind of power tubes does your amp use? Also, the 6CG7 line is remarkably similar in audio performance across various manufacturers of the same vintage or age. Working conditions, from the UA schematics: Posted by Old Stock Audio at 2: This is not seen in a lot of commercial gear, lotsa tube exchange: I spend a lot of time finding the 1bh7 spot. Silicon suck at this: Email to a Friend. The schematic may very well be correct Details Medium-Mu twin triode driver tube with 3.
You also have the R anode resistors dropping some voltage.
Double click on above image to view full picture. Dave Chandler November 27, at 7: Isn’t the shared cathode resistor r and not r?
Did you download it from Waltzing Bear?