All those resistors in front of the tapped autotransformers take a beating. I've seen 4333's with their 7.5 ohm 40 W resistors burned to a crisp.Originally Posted by Zilch
Here's the impedance curve of a 2344A/2425H with the 1.55 mH inductor (-6 dB tap) from an L300/4333 without the 7.5 ohm resistor and with the 7.5 ohm resistor. One can see it keeps the preceeding series capacitor from going haywire.