I would like to thank jdm for his excellent information on CSP2 rectifier tubes.  I found the 5Y3GT Tung Sol JAN VT197A to be as described.  I listen primarily to classical music and liked its treble.  I puchased spare NOS and thought that it would be my standard tube.

I then tried a Sylvania 5Y3GT JAN VT197A. I prefer the treble response of the Sylvania.  So much, that I have purchased a lifetime supply+ of NOS Sylvanias.

I use in both the CSP2 and the Taboo a Bendix 6106. It's sounds the best to me with my horns and cube .

Has anyone compared the Bendix 6106 vs a Tung Sol 5Y3G series?

I am looking for a "balanced" tube able to handle all types of music, e.g. Classical, modern Pop and Jazz. Anything except heavy metal.

Dear Kingpin,

Thanks for sharing that bit of info.

I did managed to get hold of the Bendix 6106 and Tung Sol 5Y3GT at the same time.

I am still burning in and enjoying the use of the Bendix 6106 at the moment. Yes, the bass is pretty good.

To make a fair comparison, I have decided to let both rectifiers be burned-in and utilised for at least 200hrs of playtime on the CSP2+.

I shall report back on my findings as soon as I hit the 200hrs mark for both rectifiers.

Regards,

Soth

Dear S1,

My take is that you won't regret using either one in your amp. Both are very good sonically.

The short answer is that I had to give up with this experiment due to the great number of variables involved.

After I found the design notes from Steve, http://www.decware.com/paper56.htm

I realised that it is not so easy to provide an objective review of rectifiers in the CSP2+.
Both the Bendix 6106 and Tung Sol 5Y3GT belong to the same 5Y3 family but the Bendix is indirectly heated and also causes a greater voltage drop.

Now, rolling the front tube already has a dramatic effect on the sound of the CSP2+.
So any scientific review would mean that I have to

1. Hold the input tube steady and change the rectifiers
We are basically comparing the sonics of the same input tube based on running it at different voltages.

Not everyone runs the same input tube so any input I provide would not be objective.

2. Change the Input tube and hold the rectifiers steady
The idea here is that I would have to try to isolate the differences in sonics due to the use of different input tubes vs the sonics caused by the use of the rectifiers.

BTW, if anyone out there actually made it so far in this post of mine  ;D, my conclusion is that both rectifiers are very good sonically!

I bought the Tung Sol 5Y3GT based on an earlier review made in this forum. That was before I found Steve's design notes mentioned above BTW.

I ended up using my Bendix 6106 in another tube amp because it worked very well there.

As for the Tung Sol 5Y3GT, it seemed to work very well sonically with whatever genre of music and input tubes I threw at it in the CSP2+!
So I decided to just leave it there.

Again many thanks Lord Soth,  for your invaluable inputs which I will most certainly follow.

That's a good point. I run my CSP2 with all stock tubes, except for the rectifier (stock type, but RCA NOS) and that my 6N1P tubes are cryo'd. And my Torii with all stock tube types, with the exception that the input tubes are cryo'd, and the rectifiers are RCA NOS.

I've certainly done a LOT of tube-rolling, but have held steady with these for some time.