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Old 1st December 2018, 03:54 AM   #1
vkung is offline vkung  Canada
diyAudio Member
 
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)
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; 3rd August 2019 at 10:56 PM.
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Old 3rd August 2019, 07:16 PM   #2
justinsweber is offline justinsweber  United States
diyAudio Member
 
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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