Akarakrit 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, 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.

Posted by at

8 comments:

  1. AnonymousAugust 1, 2015 at 5:52 AM

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

    ReplyDelete
    Replies
    1. Akarakrit UamkrueaAugust 2, 2015 at 5:13 PM

      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. AnonymousAugust 4, 2015 at 2:11 PM

    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. Akarakrit UamkrueaAugust 4, 2015 at 8:38 PM

    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. AnonymousAugust 5, 2015 at 6:48 AM

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

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

    ReplyDelete
  5. AnonymousAugust 5, 2015 at 2:09 PM

    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. AnonymousAugust 5, 2015 at 2:11 PM

    Sorry....I found it!
    Cheers, Owen

    ReplyDelete
  7. Akarakrit UamkrueaAugust 7, 2015 at 10:43 AM

    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

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