My First GainClone Project is under way!

3 Years! My follow-up is lacking. :bigeyes: :)

Yes, I did manage to tap the circuitry to make a pre-out on my SA-GX505 receiver. The following links were very helpful in figuring it all out:

Commentary on why the SVI 3206 eventually fails in this receiver:
http://www.diyaudio.com/forums/showthread/t-25436.html

SVI 3206 pinout, linked from the above page:
http://www.geocities.com/technicshifi/SVI3206.jpg

The site where the pinout diagram originated:
http://www.welcome.to/technics

And here is my handiwork:
http://www.colp.ca/projects_technicspreamp.html

The connection is very simple. I first removed the SVI 3206 module. After confirming that pins 13 and 15 were the right pins, I wired some RCA jacks to the spots where input pins 13 & 15 go. I hooked my grounds to jumper J609, which is signal ground, conveniently located just forward of the SVI module pins.

This receiver and my gainclone amp make a good pair.
 
EDIT : OOOPS... I didn't notice this is such and old thread. I HATE THAT!!!



I see you've already acquired your heatsinks, but as a fellow
bargain hunter, I found a pretty nice deal on ebay that you
might want to consider. You know, for future projects and such.

Aluminum Heat Sink 3 13/16" x 2 3/4" x 1"
Buy-it-now price : US $1.00
Quantity available : 100
Item location : Oxford, Alabama, United States
Ships to : Worldwide

95ab_1.JPG


I'm not affiliated in any way with this vendor, but I have purchased
these heatsinks from him before. The quality is excellent, and
for this price it's too good a bargain to pass up.
 

Mostyn13

Member
2015-06-15 9:08 am
SVI module substitution??

Hi there newbie here, I'm in the process of substituting an SVI3204 in a not too dissimilar Technics SU-X502 I have found a nice little pre assembled Toshiba TT1943/TT5200 amp module that suits the existing Power supply in the technics but I'm having difficulty finding the input signal ground I have tried using pin 14 from where the old SVI sat but find it extremely noisy can anybody help point me to the actual correct area or possibly pin I should use as finding any info on these SVI modules is difficult.
 

Mostyn13

Member
2015-06-15 9:08 am
Hi technogeek many thanks for your reply, I'm thinking both pin 11 and 14 are just both normal chassis ground looking again at this diagram I see pin 9 has a 6v 33uf capacitor to ground and also pin 17 has a 35v 47uf capacitor to ground I presume some sort of decoupling, there must be a separate signal ground, I will try these two and see if any less hum is produced thanks again.