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Old 1st December 2018, 04:54 AM   #1
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
Default 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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Last edited by vkung; 9th December 2019 at 01:58 AM.
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Old 3rd August 2019, 08:16 PM   #2
justinsweber is offline justinsweber  United States
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Join Date: Jan 2011
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.
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Last edited by vkung; 9th December 2019 at 01:55 AM.
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Old 17th November 2019, 12:00 AM   #3
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
Wall of Sound
Coming Soon: Sun Valley SV-Pre1616d Tube Preamp Kit | Wall of Sound | Audio and Music Reviews
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Old 1st December 2019, 04:15 AM   #4
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
YouTube
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Old 9th December 2019, 01:59 AM   #5
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
Wall oF Sound Review
SunValley SV-Pre1616D Tube Line Stage Kit Review | Wall of Sound | Audio and Music Reviews
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Old 10th December 2019, 11:58 AM   #6
gpdavis2 is offline gpdavis2  United States
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Join Date: Aug 2004
Location: NJ Shore
Could you roll in a 12BZ7 ?
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Old 10th December 2019, 10:11 PM   #7
Steve Morley is offline Steve Morley  Canada
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Join Date: Jan 2015
Location: Georgian Bay
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
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Old 10th December 2019, 10:20 PM   #8
gpdavis2 is offline gpdavis2  United States
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Join Date: Aug 2004
Location: NJ Shore
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.
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Old 10th December 2019, 10:37 PM   #9
Steve Morley is offline Steve Morley  Canada
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Join Date: Jan 2015
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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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