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-   -   Sunvalley SV-Pre1616D Point to Point Prject (https://www.diyaudio.com/forums/elekit/330663-sunvalley-sv-pre1616d-prject.html)

vkung 1st December 2018 04:54 AM

Sunvalley SV-Pre1616D Point to Point Prject
 
Sunvalley SV-Pre1616D 115/230 version (point to point pre-amp project)
Made in Japan (Nagoya)

SunValley SV-Pre1616D Tube Line Stage Kit Review | Wall of Sound | Audio and Music Reviews
AVAILABLE now $795.00


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- 12 AX 7 JJ ECC 82/12 AU 7 
- 12 AX 7 GD 12 AU 7
- Mullard CV 4003/12 AU 7 (3 matched) SOVTEK 5 AR 4


You can use the following combination

① 12 AX 7 - 12 AX 7 - 12 AX 7 (Sharp and high contrast)
* Standard combination (SV - 722 Marantz type and same circuit)

② 12 AX 7 - 12 AX 7 - 12 AU 7 (Skeletal feeling and entity feeling of medium low range)
* SV - 722 Mckin type sound image Reproduced

③ 12 AU 7 - 12 AU 7 - 12 AU 7 (round and resonate rich)
※ Featuring a rich overtone feeling of the SV - 310 series


Input: 4 lines [Input 4 can be changed to USB input (option)]
Input Volume: Yes

frequency response: 15 Hz ~ 70 kHz (-3 dB)
gain: 15 dB

size: 250W, 225D, 135H (mm ) ※ including protrusions
weight: 3.6 kg



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justinsweber 3rd August 2019 08:16 PM

5 Attachment(s)
Sun Valley SV-Pre1616D Build results

I saw Victor at THE SHOW, its always great to see what new things he has cooked up.
He didnt have the kit on hand.. didnt want to ship me a kit with instructions in Japanese.
After seeing the schematic and the numbers in English I knew I could do it.
Anyone who has built a dynaco can do this.
The PS on the PCB is awesome... the rest is point to point and simple instructions gets it done.
I did 1 upgrade, I swapped the stock Vol pot for an Alps of the same value. Super ease to source. I did try and use my own RCA but would have had to open the holes. In the end it was easier to use the kit as shipped.

Sonics... this is a real winner. Very detailed and quite. Its a Tube Pre with a GZ34 rectifier so may not have the SS speed but it was bought for its tone!

This is Japanese audio at its finest... if you think purest is the right direction.

vkung 17th November 2019 12:00 AM

Wall of Sound
Coming Soon: Sun Valley SV-Pre1616d Tube Preamp Kit | Wall of Sound | Audio and Music Reviews

vkung 1st December 2019 04:15 AM

YouTube

vkung 9th December 2019 01:59 AM

Wall oF Sound Review
SunValley SV-Pre1616D Tube Line Stage Kit Review | Wall of Sound | Audio and Music Reviews

gpdavis2 10th December 2019 11:58 AM

Could you roll in a 12BZ7 ?

Steve Morley 10th December 2019 10:11 PM

12BZ7s draw twice as much heater current compared to the 12AT7, AU7, AX7 family. Three B7s might over-stress the heater supply, the regulator, especially.

Steve

gpdavis2 10th December 2019 10:20 PM

That's why I stated 'a' 12BZ7. Was thinking of just one (like Mr. Creosote - just one thin mint). I would start in the last slot. Hmmmm........ wondering if I should roll in a pair in my Elekit TU-8500? Maybe this summer.

Steve Morley 10th December 2019 10:37 PM

The 8500 doesn't regulate the filament supply. There is a dropping resistor, iirc, though the BZs might overheat it. Hard to say. The BZ is a high Mu tube. The 8500 is designed for low to medium Mu tubes.

In the SunValley V3 position (output cathode follower) a low to medium Mu tube, say 12AU7 or 12AT7 might be the better bet.

Steve


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