May 12, 2010 · 12BH7 Listening Test! The 12BH7 shares many similarities to the 6SN7 (also a favorite tube around these parts), but is characterized by a darker sound. In the past, this tube was known simply as a favorite driver for the old Macintosh amps, or as an inexpensive alternative to the 5687 and the 12AU7.
Audio Asylum - Tubes Asylum: JJ-ECC99 vs. EH-12BH7 first impression by JJ Triode - Questions about tubes and gear that glows. ?audio/faq.html#tubes>FAQ</a>
ECC99 JJ Tesla Tube A new tube recently introduced by Tesla/JJ, combines electrical characteristics similar to 7119/E182CC (high transconductance and low plate resistance) with a pinout the same as 12AU7/ECC82 or 12BH7. Can be used in place of 12AU7 or 12BH7 in certain applications (like our Dynaco boards). 6GU7 IS a 12BH7 with a 6.3 volt filament. Look at the specs. 5687 looks good on paper and is fine for some things but when I tried rewiring an Altec 1569 to use them, there were problems with excessive control grid current tossing the voltages off. Replacing with 7119/E182CC fixed the problem (and E1822CC can swing a pile of voltage). >12BH7 would give lower distortion. Is it correct and is the 12BH7 a drop-in >replacement for the ECC83? The 12BH7 is a very different tube from the 12AX7. But if the designer says it will work in THIS application, you should assume it's OK to make the substitution.-Henry Title: Doc1.PDF Author: Unknown Created Date: Tuesday, April 09, 2002 9:50:08 PM
The 12BH7 is equivalent to the ECC99, and I think it provides a little bit more output power than a 6SN7, maybe a watt or two. Also the socket is cheaper, I think. Even though they're still being made, there's been a move away from octal preamp tubes since the mid 1950s, and very few new amps have them. Sep 26, 2009 · Same adapter as for the 12a*7 & 12bh7 The MPX3 puts about 160V on the plate of the "bottom" triode in the WCF, which looks like a nice voltage for the ECC99 BUT! I would note that the ECC99 will draw about twice as much current as 6sn7 in an MPX3 (about 25mA vs 8-12mA depending on exactly how the amp was built) This puts you very close to the ... The 12BH7 is equivalent to the ECC99, and I think it provides a little bit more output power than a 6SN7, maybe a watt or two. Also the socket is cheaper, I think. Even though they're still being made, there's been a move away from octal preamp tubes since the mid 1950s, and very few new amps have them. So, this is my vintage Fender Deluxe Reverb that i've had for right at 10 years and the story of how i acquired it is insane. So when I was about 14,my cousin who used to work for a company that demolished houses.