SUT - electrical theory and practical experience

Hi @pindac ,

I had the original EAR 834. I like it but I saw it was built with very cheap components and power supply. Romy The Cat article "End Of Live Phonostage" inspired me to build my DIY EAR 834 with better parts (including air capacitors, z-foil and AN silver Tantalum resistors, Jupiter signal capacitors,...) and power supply with LCLC filtering, parallel voltage regulator based on 0A2 tubes and different other upgrades.

So, my DIY EAR 834 is a different animal compared to the original one. The schematics is very important but the implementation is even more.

Regards,

Alex.

Hi @rauliruegas ,

Yes I use these Tamura SUT with box build by myself without switches. All wires are directly soldered to RCA. 

But I thinking to built a new box for my DIY phonostage where I want to place SUTs near input tubes. So I can rid of SUT to phonostage interconnects.

Regards,

Alex.

Dear @alexberger  : Great.

R.

@drbond  : What happens with an external SUT about all those additional " steps " where the cartridge signal must pass through is almost the same when the cartridge signal from your CH must goes to an external line preamp and that additional step makes nothing but signal degradation but exist something additional in your electronics and is that the cartridge signal suddenly must pass through a way different line preamp design not a CH unit to preserve at least same " signature ".

That's why normally is better to own a Phonolinepreamp where we have to add nothing to the cartridge signal.

R.

@alexberger I have no criticism of the 834P (Original) and in (Clone Build Versions) I would say a few Clone Versions were built to a high spec' as I know one of the builders and who they take their influences from on DIY Projects.

As said the ECC83 is a hard Tube to tame and can be overbearingly rich and bloat the lowest frequencies.

I learnt this more than 25 Years ago with a Valve Pre-Amp'.

I also learnt I am repellent to discernible Rich Tones and Loose Bass.

There are humungous music enthusiasts who are very satisfied with this type of presentation, and I am genuinely very pleased they have discovered the Sound Quality that offers satisfaction.

The SUT as already referred to within this thread is capable of adding richness and in some cases with a quite discernible and notable impact on the SQ.

As said, it is difficult to imagine a SUT in use with an EAR 834P that would be capable of reducing the perception of richness, the pairing would seemingly create a richness, but to what degree of being noticeable, and perceived as an attraction or repellent is with an unknown outcome.