Converting Solid State to Tube Rectification on a Preamp

Rodman.... currently on the preamp I have a Schottky Diode 10120a from Cree/Wofspeed.   To me it's the best custom bridge Rectifier that i have try so far.   The Schottky outperformed the Vishay Hexfred ( ultra fast, ultra soft). 

I have a Blue Circle 21 preamp. Output tubes are 6sn7 with a solid state bridge rectifier. I want to replace that solid state bridge rectifier with a tube say 6x5. I will be using the existing 6v for the heater or running on battery for the heater. My questions are:

1)  curently the unit is running on a bridge rectifier, if i convert it to tube, then it has to be half wave rectifier.   To run the preamp at full wave, a pair of two 6x5 are needed?  

2) if i do make that change to a single 6x5 tube rectifier, with the preamp does it matter if i do run it in a half wave or full wave??

3) does anyone knows how to do this, if you can help me out??

Much appreciated!!

czarivey... so from your experiences, with triode rect., it sounds better than a solid state rectifier?  

I think Viva amps has two 211 or 845 as rectifier.   Talking about blowing crazy money, that is just be-on my league!  

Imhififan... the voltage on the secondary power transformer is around say 350v.   As an option on this preamp; Blue circle website do sell a separate power supply, pretty sure it will work with my preamp.  But i do not want to take that route.  

why would i change a solid state rect. to tube??? I am curious to see if a tube rect will outperform a solid states in my preamp.  All members feeback are much appreciated!  

Imfihifan... thanks for the awesome link. 

if i decided to do just a half wave rectifier using a single tube 6x5, is that possible?   Also, with the secondary measure at 350v, that is more than enough for a single 6x5 plate voltage?