Wednesday, March 8, 2017

The AKG C12A is cathode underheated as is Neumann U47

The heater of its Nuvistor tube is supplied by 5V instead of 6.3V.


A reason may be less grid current induced from less violent cathode emission.


This principle is also used on Pleiades amplifiers and preamplifiers and there is more discussion on other euroelectron posts.

No comments:

Post a Comment