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, July 27, 2015

Monday Modify : End of Life Phonostage modified

After finishing "End of Life" Phonostage for test.

http://mellowgroovy.blogspot.com/2015/06/monday-modify-end-of-life-phonostage.html

Sound really good with macro and micro detail, speed so accurate.

But a bit bright and lack of deep bass present to the system.

So I think to replace almost PRP metal film resistors with other types

like tantalum, carbon composite and thick film resistors.

Also replace Black Beauty with West-Cap CPV09 for coupling capacitor.


Before ...



After ...



Burn-in for a while and found more bass and thicker sound.

But detail and dynamic still exist.

Might be continue burn-in and monitor again.


Next station, will test & taste LCR phonostage.

8 comments:

  1. That's very cool!
    I am interested in your LCR EQ experiments - I am on that path too....
    Many Thanks - Owen

    ReplyDelete
    Replies
    1. Thanks for your interest.

      Will update frequently and pleasure if you sharing yours with me.

      Still need suggestion about driving method.

      Best regards,

      Delete
  2. Hi again Nattawoot- I have not built LCR EQ yet. Right now I am trialling a Lounge Audio LCR phono stage & I like what I hear - low impedance inductors allow the music to "breathe' better, I believe. (Similar to TVC attenuator characteristics.)

    I would like to include LCR EQ into my Phi-42 tube phono stage.
    But yes, which drive cct choice? - I am thinking maybe (i) low impedance mu-stage, or (ii) Interstage TX?

    I see that you will use the Sowter LCR inductor set?
    Cheers, Owen

    ReplyDelete
  3. Hi Owen,

    Yes, I plan to use coils module from Sowter for first version.

    I will select drive solution with interstage before and after LCR EQ.

    After build and test, I will share you a circuit and result.


    Cheers from Thailand, Nattawoot

    ReplyDelete
  4. Great - do you think interstage is necessary on the LCR output?

    I have some Tango NP-126 ITs.
    Cheers, Owen

    ReplyDelete
  5. Hi Nattawoot - I don't see the RIAA LCR units on Sowter's website.
    What is the approx. cost for a pr?
    Cheers, Owen

    ReplyDelete
  6. Hi Owen,

    I think interstage necessary for LCR input, great result but more expensive.

    Nice that you found it.

    Lundahl also make the EQ coils too but 2 coils are separate.

    Cheers, Nattawoot

    ReplyDelete