Nattawut Uamkruea, blogger and audio gear maker who passionate in vacuum tube, audio & music.
Producing electronics projects since high school. Seriously upgrade and modify vintage audio equipment for “Real Sound” concept.
He is a co-founder of Soundaries and Sentimental Studio, all audio solution provider.
Experienced and lively explore the listening rooms & audio shops in Japan as his most favorite to do.

Monday, June 15, 2015

Monday Modify : End of Life Phonostage tasting

This is my current phonostage that inspired by "End of Life Phonostage" 

refer to Romy the Cat site.


It's EAR834 modified by improve minor points but much more effective.


Interesting part was using "Air Variable Capacitor" in RIAA equalizer 

instant of normally use like silver mica, polystyrene, film&foil or others.

Result expected for this way is not disappoint.

Sound so airy, more detail, 3D and balance.

I've use Sprague "Black Beauty" / Obbligato Copper capacitor for couplings 

and PRP metal film resistor in almost circuit.


Separate phonostage and power supply.


Using "NEVE" output transformer.



Mesh plate Amperex "0A2" tubes for voltage stabilizer. 




As I mention above with components that I've using.

I think some frequencies cause harsh sound and metal film resistors 

were the points that I want to replace first with resistor types 

that give more warm and mellow sound like carbon composition and tantalum.


Will update again soon.

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