Modifying Technics SUV78 - Page 3

richie00boy · 14th January 2004, 07:47 AM

Some sound advice from EchoWars.

IMO it would have been a very bad thing to mess about with the IC as IME with these kind of amps they are not STK modules but Technics proprietary chips. The topology is completely different to the common power amp chips that alot of DIYers are using.

SkinnyBoy · 14th January 2004, 09:30 AM

hmmm.. my amp has a wreaked secondary winding on the transformer.... (BIN IT!!)

Bose(o) · 14th January 2004, 01:16 PM

I'm loving Skinny's posts in between logical uhhh...information.

Well, I'll just sit patient until I can buy myself a better receiver...H/K, Yamaha, etc. ...still waiting for a potentiometer.

SVI2004A · 26th March 2004, 09:09 AM

SVI3205... 100w/ch > SVI3206 130w/ch

much better than STK and will defacate on them cheap monolithic ICs

SVI 3205 features 2X 100W (RMS) new class A High Current Drive output Stage

Full onboard pre amp & thump/dethump/overload/DC-DET ciruit
requires few ext components

SMD resistors

using anything other than SVI will be a downgrade...

if however you do change - send me the SVI :P

Bose(o) · 29th March 2004, 11:02 PM

Well, I've decided against yanking her apart considering she didn't deserve the broken pot. Right now I'm just looking for a stereo pot to solder on and crank up the tunes once more.

BriTer · 7th August 2006, 07:22 PM

Thought I would post this here because of the specific amp.
Getting ready to go pick up some equipment, is it worth the $75? Was bought originally as a package deal except for the Sony. Includes original speakers. Turntable was recently sold

How nice a sound does the amp have?

Technics ST-S78 TUNER
TECHNICS RS-T18 DOUBLE CASSETTE DECK
TECHNICS SU-V78 AMP
? HI-FIDA4 VHS PLAYER
TECHNICS SL-PC33 5 DISK PLAYER
SONY CDP-C315 5-DISK PLAYER
SOME OPERATING INSTRUCTION BOOKLETS
Plus glass front stand

Bose(o) · 7th August 2006, 07:53 PM

If you don't already have a system that would be a great building block. The Technics stuff isn't too bad.

PS, SVI, I have that IC if you want it.

SVI2004A · 8th August 2006, 12:15 PM

which one is that?

SVI*****?

email me - im always lookin for em

cyclecamper · 26th July 2011, 01:29 AM

Old thread.
I just got a Technics SU-Z780 integrated amps with the same SVI 3205 chip amp (actually I think it's some surface-mount parts all potted into a stereo amp epoxy block), for $6 on eBay, for my daughter to use with her ipod dock and some minimus speakers. Sure is a simple amp, and fan cooled! About 80 watts a channel, rated 100/channel. Who knows what Technics means by "new class A" as it certainly isn't really class-a biased.

14th January 2004, 01:16 PM	#23
Bose(o) diyAudio Member Join Date: Dec 2001 Location: Ottawa, Ontario, Canada	I'm loving Skinny's posts in between logical uhhh...information. Well, I'll just sit patient until I can buy myself a better receiver...H/K, Yamaha, etc. ...still waiting for a potentiometer. __________________ ERTW 4 life! "the day has 24hours. If that is not enough take the night."-Roemhild

26th March 2004, 09:09 AM	#24
SVI2004A diyAudio Member Join Date: Mar 2004 Location: Albany Western Australia	like sweet?... heres a lil honey SVI3205... 100w/ch > SVI3206 130w/ch much better than STK and will defacate on them cheap monolithic ICs SVI 3205 features 2X 100W (RMS) new class A High Current Drive output Stage Full onboard pre amp & thump/dethump/overload/DC-DET ciruit requires few ext components SMD resistors using anything other than SVI will be a downgrade... if however you do change - send me the SVI :P __________________ .:Ride the Lightning...Feel the Thunder:. - Technics Triple Thunder www.welcome.to/Technics oh yes ppl plz send me them dead (or Alive) STK or SVI ICs

29th March 2004, 11:02 PM	#25
Bose(o) diyAudio Member Join Date: Dec 2001 Location: Ottawa, Ontario, Canada	Well, I've decided against yanking her apart considering she didn't deserve the broken pot. Right now I'm just looking for a stereo pot to solder on and crank up the tunes once more. __________________ ERTW 4 life! "the day has 24hours. If that is not enough take the night."-Roemhild

7th August 2006, 07:53 PM	#27
Bose(o) diyAudio Member Join Date: Dec 2001 Location: Ottawa, Ontario, Canada	If you don't already have a system that would be a great building block. The Technics stuff isn't too bad. PS, SVI, I have that IC if you want it. __________________ ERTW 4 life! "the day has 24hours. If that is not enough take the night."-Roemhild

8th August 2006, 12:15 PM	#28
SVI2004A diyAudio Member Join Date: Mar 2004 Location: Albany Western Australia	which one is that? SVI*****? email me - im always lookin for em __________________ .:Ride the Lightning...Feel the Thunder:. - Technics Triple Thunder www.welcome.to/Technics oh yes ppl plz send me them dead (or Alive) STK or SVI ICs


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14th January 2004, 07:47 AM	#21
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Some sound advice from EchoWars. IMO it would have been a very bad thing to mess about with the IC as IME with these kind of amps they are not STK modules but Technics proprietary chips. The topology is completely different to the common power amp chips that alot of DIYers are using.

14th January 2004, 09:30 AM	#22
SkinnyBoy Banned Join Date: Nov 2002 Location: Adelaide, Australia	hmmm.. my amp has a wreaked secondary winding on the transformer.... (BIN IT!!)

7th August 2006, 07:22 PM	#26
BriTer diyAudio Member Join Date: Aug 2006	Thought I would post this here because of the specific amp. Getting ready to go pick up some equipment, is it worth the $75? Was bought originally as a package deal except for the Sony. Includes original speakers. Turntable was recently sold How nice a sound does the amp have? Technics ST-S78 TUNER TECHNICS RS-T18 DOUBLE CASSETTE DECK TECHNICS SU-V78 AMP ? HI-FIDA4 VHS PLAYER TECHNICS SL-PC33 5 DISK PLAYER SONY CDP-C315 5-DISK PLAYER SOME OPERATING INSTRUCTION BOOKLETS Plus glass front stand

26th July 2011, 01:29 AM	#29
cyclecamper diyAudio Member Join Date: May 2010 Location: was Chicago IL, now Long Beach CA	Old thread. I just got a Technics SU-Z780 integrated amps with the same SVI 3205 chip amp (actually I think it's some surface-mount parts all potted into a stereo amp epoxy block), for $6 on eBay, for my daughter to use with her ipod dock and some minimus speakers. Sure is a simple amp, and fan cooled! About 80 watts a channel, rated 100/channel. Who knows what Technics means by "new class A" as it certainly isn't really class-a biased.

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