The Harvard has negative feedback and that's what it's based on. The feedback resistor is in red.
The Ivy League is a loving recreation of the classic 5F10 Fender Harvard style amplifier. Every aspect of the original model is reproduced in the Ivy League; triple inputs, 6AT6 7 pin preamp tube, twin 6V6 power tubes and a single 10″ speaker. 12″ speaker and V-Front 2×10″ cabinets available.