The VT-24 uses the identical circuit and custom Jensen input and output transformers as all DW Fearn mic preamps. It has four true VU meters, but they are smaller than on a VT-1/VT-2. Specs are the same as a VT-2, and, most importantly, the sound is exactly the same.
The VT-24 has eight tubes, but it runs cool enough that no fan is required, so you can have it next to live mics without a problem.
One thing that DW Fearn did have to eliminate in the VT-24 is the meter switch. But the 48V phantom power, 20dB pad, and special input selection for Low-Z microphones are just like on a VT-1/VT-2. The power switch is on the front panel.