kidvybes said:
..the GE 5-Star NOS 6072 (Highgrade 12AY7) is appropriate in most mic applications as a replacement for the stock 12AT7 or 12AX7 tubes...the lower gain value (45 compared to the 12AT7's value of 60) and improved resistance to microphonics make it more desireable in microphone applications...I have upgraded all my stock microphone 12AT7 and 12AX7 tubes to 6072 variations with excellent results...the 6072 was the original stock tube used in many of the classic vintage tube mics (AKG C12 for one)...most of the current Chinese tube mics are essentially "cloned" from these same classic tube mic designs...the stock Chinese and Soviet 12AT7 tubes that are supplied with the newer mics are simply cheaper and more available than the 6072 variations...
Well kidvybes, I gotta hand it to you.....
I am working with sE to become a formal sE Dealer and in the sE material Bob Reardon has shared with me I have found the following:
Z5600A - $899 SRP
Tube condenser with 9 selectable polar patterns.
High-sensitivity with replaceable industry-standard 12AT7 valve.
Polar Patterns: Cardioid, Omni, & Figure 8.
Frequency Response: 20Hz-20KHz
Sensitivity: 14.1mV/Pa - 37± 1dB(0dB=1V/Pa 1000Hz)
Equivalent Noise Level 16dB(A weighted)
130dB max SPL, Impedance: ≤ 200Ω
Includes power supply, cable, shockmount and deluxe flight case.
Guess there will be some tubes added to my Christmas list!!!

FYI, the tube in
my Z5600A is an sE branded tube....