Modwright PH 9.0X Tube Rolling Question

Travis, I can only tell you that if you look up what tube rectifiers are cross-compatible with the 274B, the only tube that comes up is 5U4G.  I leave it to you to do further research. One other found fact: the 274B does not like to be followed by a filter capacitor of greater than 10uF value.  Many rectifier tubes come with a specification for the max value of the first capacitor following the rectifier.

This reference might help:http://www.fourwater.com/files/fullrect.txt

@travisg :"I’m using the Sophia Aqua II 274B rectifier. Sounds pretty good. Wondering if I should try the Philips 5R4GYS?"

YES !

Kristen at Modwright listed the following rectifiers:

GZ34, 5R4GYS, 5R4GY, 274B, 5U4, 5U4GB, 5V4, 5V4G, 5V4GB 

Dan has two that are his top picks, an NOS GZ34 or 5R4GY 

The NOS GZ34`s are pretty steep $$$  

Hi @scm  - I just got my Modwright 9.0X PSU moded to use tube rectification. I am ready to try some vintage tubes. There is a white ceramic resistor right next to the tube socket. Tubes with wide bases (like the coke bottle style RCA 5R4GYs) seem to tilt the resistor a little bit. Not a lot but surely noticeable. Modwright assured me that this was not a problem - but my OCD is kicking in to high gear. What was your experience like? See pics below. 

https://imgpile.com/images/C3jlIl.jpg

Thanks!