There was a couple threads on GS but at the time I believe Blue was a big contribution / donator to GS so they banned/ heavily censored the threads...
I will look to some info on these Blue hjack jobs...
The blue 47 is a 57 style capsule with a ef800/ ef86 tube so different circuit..
To quote David Bock" he's correct the bottle has the same circuit as their 47
D.Bock
I got a reply on PSW..........here's what David said....
I'm sure i've posted this before, but here goes:
the differences between the blue47 and an original are:
different capsule (does not sound the same in the bass)
different tube type
different amplification system (active plate load not simple resistor, sounds different-lowers noise but changes distortion charachteristics)
different tube bias system (changes dynamic response)
completely different transformer (different laminations and it's not a four section winding like the original, of course, will sound different)
nice film caps on the output (unlike the original, these aren't as non-linear as the originals but the output caps on most of those fifty year old U47's should be changed to film by now anyway)
different tube mounting system (affects handling noise & non-linear distortions)
completely different power sypply (will sound different than original circuit, but theirs is ok so it's a matter of taste regarding your personal preference)
that's it
regards
David Bock"
www.gearslutz.com/board/high-end/20928-blue-u47-2.htmlSorry to post a GS hyperlink JK... in that thread " Nobtwiddler " who is a member here at RGO says he has one and it's nice... many others in the thread disagree... Some paid $5000-$6000 for this blue mic yikes....