With a tube rectifier there are no switching glitches so not sure what the comments above are about.
Even when you use the solid state "relief" diodes in the anode feeds to the tube rectifier you still do not get switching glitches (relief for the tube rectifier from handling the full Peak Inverse Voltage (PIV)).
Switching glitches arise with SS diodes when the voltage reverses polarity. The forward biased junction of the SS diode has junction capacitance which has a charge. As the voltage reverses you get a "splat" of current in the reverse direction to "sweep out" that junction capacitance charge before the SS diode turns OFF. The size of that junction charge is what determines the severity of that noise spike and it is what is different between normal SS diodes, ultrafast soft recovery diodes (approx 1/5th the junction charge) and Schottky Diodes (about 1/10th or less the junction charge) - Slightly simplified explaination but covers the "essence" wihout getting into solids state physics..
You need a current path for that reverse direction current "splat" and the tube rectifier simply does not allow it. That is, the reverse current "splat" is blocked by the tube rectifier.
That also means that your SS relief diodes don't need to be anything special, bog standard "garden variety" 1N4007 or similar diodes will do. All you need to worry about is their volatge (PIV) rating.
Cheers,
Ian