[Raleigh]

I finished recapping and rewiring a 42-350. In the end I replaced almost every wire, cap, and resistor in the radio. I took notes before disconnecting anything so I could put it all back right, but my notes weren't good enough, apparently. What happens is that resistor 78 burns up. This resistor connects directly to the center tap of the power transformer secondary and provides bias for 7B5 g1. I used a pair of 1 watt resistors in series to make up the 270 ohms, though I believe the original 270 ohm was a 1 watt.

I've compared all the power supply wiring with the schematic and fixed a mistake or two. No change. The power transformer resistance seems OK. Primary about 11 ohms and the secondary about 260 to 280 on each leg. The filament winding is about .6 ohm.

I am at my wits end and don't know what to look at next. I'd appreciate it if one of you more experienced guys could suggest new troubleshooting steps to me.

I made some measurements after substituting an 1.8K resistor in place of the field coil and a 1 ohm resistor in place of the voice coil, and using a 40W dim bulb tester. I measured about 1.4 ma through resistor 78 and about 18 Volts AC across it. DC voltage across it was almost nothing. There was about 2.7 VAC across the 18K resistor substituting for the field coil, and again DC volts were almost zero.

Resistor 78 measures 297 ohms to ground, just as it should, so there doesn't seem to be a short there.

Any thoughts for what to check next, or any specific wiring error that could make this happen? This radio worked before I got my hands on it, so it makes me sick that I've messed it up.