Tektronix 475 +15V power rail issues

[Warsp]

I recently got a tektronix 475 and after replacing all of the filter caps and all of the underrated tantalum capacitors, the 15V rail is still not working. I narrowed the problem down to the +15v unreg rail which is also low but I don't know exactly what the problem is. I initially suspected the bridge rectifier but after testing it with my oscilloscope component tester against a working rectifier, it appears to be working. I also tested the +15v unreg rail without the fuse going to the crt circuit and removing power from all boards besides the main board but the problem was still there. I don't know what could possibly be making the +15v unreg rail go low so maybe the rectifier is actually toasted. There is ~18VAC on the transformer winding so thankfully I think the transformer is fine.

Supply voltages
+50V   50.0V
+110V 111.3V
+15V   1.7V
+5V     4.7V
-15V    -3.2V
-8V      0.4V
+15V unreg 0.4V
+50V unreg 71.9V
+105/160    10.7V -multimeter might be broken as 146.4V appears later down the circuit

Supply resistances all from + to -
+50V   2.73k
+110V multimeter can't decide
+15V   64
+5V     23
-15V    12.51k
-8V      32
+50V unreg multi meter can't decide
+105/160    no resistance or greater than 2M

-8V and -15V are regulated by +15V, so it is expected that they wouldn't work. As for the resistance either my scope is very messed up or my cheap hardware store multi meter is acting up. There was definitely a bad filter cap and some shorted tantalums on the +15V rail which may have cause the mains fuse to blow before I got it.
Thanks for the help

[Warsp]

The problem with the +15v rail was that the + pin on the filter cap was not soldered to the pcb on both sides and was not connected to the bridge rectifier. All of the power rails are now good and the crt shows a dot on part of the screen. Unfortunately it seems that a lot of the crt control circuitry is messed up, so no trace yet.