My DT50-212 just started to generate a strong noise(hissing) independend from volume. Strongest noise in Class AB, Pentode mode. Does anybody have an idea?
DT50-212 just started to generate a strong noise(hissing)
Posted 17 May 2014 - 05:59 PM
I have the same thing. From what I have been reading on this forum, it seems that I will have to replace my tubes. Most said that the hiss goes away
Posted 18 May 2014 - 11:23 AM
Posted 18 May 2014 - 11:43 AM
Exchanging the two 12AX7 with new ones made the hissing disappear. Out of curiosity I put the old ones back in and - surprise - the hissing was still gone. To play it safe I'm using the new ones.
Location: Frankfurt, Germany
Posted 16 December 2014 - 10:33 AM
Old thread, but i have the maybe the same problem with my DT25 Head.
Highgain Voicings produce a hissing which getting louder if i turn the Mastervolume to a higher position.
In British Crunch Voicings their is a humbling sound which is independent from the mastervolume.
The amp has new valves (setting up from a tech) and nothing changes.