It’s Too Late

Stayed in bed all morning just to pass the time
There’s something wrong here, there can be no denying
One of us is changing
Or maybe we just stopped trying

And it’s too late, baby, now it’s too late
Though we really did try to make it
Something inside has died
And I can’t hide and I just can’t fake it

It used to be so easy living here with you
You were light and breezy and I knew just what to do
Now you look so unhappy and I feel like a fool

And it’s too late, baby, now it’s too late
Though we really did try to make it
Something inside has died
And I can’t hide and I just can’t fake it

There’ll be good times again for me and you
But we just can’t stay together, don’t you feel it, too
Still I’m glad for what we had and how I once loved you

But it’s too late, baby, now it’s too late
Though we really did try to make it
Something inside has died and I can’t hide
And I just can’t fake it

Artist: Carole King

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Tube Pre-Amp 6n1p SSS (sangat sederhana sekali)

Bahan utama:
[-] 1 biji tabung 6n1p
[-] 1 biji socket 9 pin
[-] 2 biji resistor 430k, 1/2w
[-] 2 biji resistor 240 ohm, 1/2w, vishay-dale
[-] 2 biji resistor 16k ohm, 2w, allen-bradley
[-] 2 biji resistor 130 ohm, 1/2w, allen-bradley
[-] 2 biji resistor 43k, 1/2w
[-] 2 biji capacitor 0.47u/600v, paper in oil (pio)
[-] 1 biji potensiometer stereo 50k, TDK
[-] kabel secukupnya
[-] timah secukupnya

Bahan power supply tegangan tinggi:
[-] 1 biji tabung rectifier ez81
[-] 1 biji socket 9 pin
[-] 4 biji elco 50u/500v
[-] 2 biji resistor 4k3, 2w
[-] 1 biji trafo choke 10H
[-] 1 biji trafo 2×275v, 1×6v3, 2×3v15

Deskripsi:

Filament Supply & B+ Supply

Rangkaian power supply B+ sama persis dengan rangkaian untuk preamp srpp dan foreplay di project sebelumnya. Hanya R di pi filter pertama diganti dengan trafo choke untuk memperkecil hum. Dan pada circuit kali ini, filament dicatu AC, dengan CT harus terhubung ke ground.

Pre-amp:

Disini masih saja menggunakan tabung 6n1p dari Svetlana.

Topology sangat basic dan sederhana yaitu grounded-cathode, cukup 1 biji tube untuk kiri dan kanan. Topology ini memiliki impedansi output yang cukup tinggi, sehingga harus menggunakan cable interkoneksi sependek mungkin. Kelemahan lainnya PSRR yang rendah, bila power supply tidak bersih, ripple/hum dari power supply bisa mempengaruhi reproduksi suara.

Uji dengar:

Untuk uji dengar kali ini, masih menggunakan satu MF-A1. Susunan peralatan:

–[Nakamichi CD-4]—[DVD Pioneer DV393]—[pre-amp ini]—[MF-A1]—[loudspeaker]–

CD referensi untuk uji dengar kali ini agak beda; Pat Metheny, Norah Jones dan Van Halen.

Karena sudah ngantuk pol, jadi gak sempat uji dengar :)) Kapan-kapan aja ya .. jadi CD referensi tak balikin dulu ke raknya

.. huaaahhmmmmmm .. zzz zzz zzz zzz zzz zzz ..

– salam — gustOmO –

source: http://www.john-a-harper.com, http://www.glass-ware.com,
software: TubeCAD