Model 24 with MFB OSC-1
2008-06-22 by (i think you can figure that out)
Had some concerns from a customer who thought his M24 was bad because there was no effect to freq on an MFB triple Digital VCO when the M24 was in the green region. Please note that the MFB does not respond to negative voltages, only positive. When the M24 dips into that region (green light), the MFB will not respond. - P