So have you tried adding a load to U5's output to see if that makes a difference?

R1 is fitted. About 33V across 2k2 means there is a load of 15mA across the bridge output.

 

Those are correct if you still have the 330Ω across the output so I am out of ideas as to why the output voltage is too high.

Hello Albert
After a good night's sleep I decided to tackle this puppy again. I started out by looking at the waveform at each of the LM337L terminals and they look pretty much as what one would expect, except.... but we'll get back to that in a few moments. Let's look at the waveforms and voltage values. (All voltage measurements referenced too ground) First here is the Input waveform showing -6.0 volts RMS


Next here is the output waveform showing -5.20 volts RMS



Finally, here is the ADJ waveform showing -3.80 volts RMS

 

Well, after pondering the situation for a while, the light bulb went on and I realized that the device could never go into regulation because the difference between the input and output is below the dropout voltage. For some reason, this sucker wants to hang up at -5.2 volts output.

So why is the input voltage so low? I put my probe on the junction of the two diodes and got this....



Only -4.8 volts!! The smoothing capacitor brings it up to -6.00 volts. So I put my probe between R2 and C3 and this is the result...


a solid +18.8 volts RMS. So my question is this: Am I losing that much across capacitor C3? Would a smaller value help my cause? Any and all help greatly appreciated.

P.S. Remember the meaning of this holiday. I lost my Dad in Korea and two high school buddies in Vietnam.

 

R1 is fitted. About 33V across 2k2 means there is a load of 15mA across the bridge output.

Problem Solved!!!
I came to the conclusion that either the LM337L was installed backwards or it was defective. Turns out it was neither of these two conditions. I asked a friend if he would verify that the LM337L was installed correctly. Since the device is hidden behind a capacitor he used a magnifying glass to get a closer look. That's when he informed me that the device installed was NOT a LM337L but a LM317L which is a totally different animal with a completely different footprint. Boy do I feel like a total jackass.

Hopefully this was a learning/teaching moment for those following this thread.