My friend passed me on this amp which has been lying in storage for the last 10 years. Don't know if it works but I think at least I can salvage some parts (transformer, Heat sink, knobs etc.) Does any body here have any idea as to how good is this amp and also is it worthwile trying to bring it back to life. The build is excellent and is very heavy amp. Also it looks like a japanese model with 100v 50/60HZ supply. Can I run it here in US????
thanks,
Dinesh
thanks,
Dinesh
Hi Dinesh
Don’t dismantle this old beauty.
Is it this one: http://www.sansui.us/images/AU707/au707_6.jpg ?
It’s build around 1976
If there’s no voltage selector switch inside you will have to run it with a transformer (220V->110V )
What’s wrong with it?
/Hugo
Don’t dismantle this old beauty.
Is it this one: http://www.sansui.us/images/AU707/au707_6.jpg ?
It’s build around 1976
If there’s no voltage selector switch inside you will have to run it with a transformer (220V->110V )
What’s wrong with it?
/Hugo
It is a japanese model I think and is made for 100V 50/60HZ. I want to be sure I can plug it into 120V US voltage to test it. Iam not sure if thats possible. Also the main power cord has the japanese style recepticle with holes in it. Any help would be appreciated.
thanks
thanks
nice amp but I think it is newer than 1976 maybe early 80`s went all the gear went to a black finish from japanese products
I still have a turntable and tapedeck from 84 era that work flawless
that amp is a definate keeper and I would not strip it
DIRT®
I still have a turntable and tapedeck from 84 era that work flawless
that amp is a definate keeper and I would not strip it
DIRT®
Might be useful for your computer speakers, but IME listening to Sansui (soundsscrewy) amps of that period is like having a disc sander applied to your ears.
Although it doesn't look like '76 it is indeed from that time period http://www.retroaudio.ru/sansui/integ/AU-707.shtml
Gents,
My main question is can I run 100V 50/60Hz stuff on US main supply of 115-120V???? and the amp looks exactly like the one pictured here except it is G series instead of F:
http://www.retroaudio.ru/sansui/integ/AU-D707F EX.shtml
Also there is lot of instruction on the back panel which is in japanese.
thanks
My main question is can I run 100V 50/60Hz stuff on US main supply of 115-120V???? and the amp looks exactly like the one pictured here except it is G series instead of F:
http://www.retroaudio.ru/sansui/integ/AU-D707F EX.shtml
Also there is lot of instruction on the back panel which is in japanese.
thanks
You might be able to use it with 120V, but it's a risk, as all unregulated voltages will go up 20%. This may go beyond electrolytic capacitors rating and may produce too much heat on regulators. You could use a variac to lower AC voltage to 100v or use a series high power resistor with primary, although I'm not sure how would this work.
Sorry, you'll need a 120V->100V transformer.
Unless AC-voltage experts tell you can safely connect it to 120V.
The mains voltage here in Belgium used to be 220VAC.
Now it's about 236VAC. Still not 20% as from 100 to 120.
/Hugo
Unless AC-voltage experts tell you can safely connect it to 120V.
The mains voltage here in Belgium used to be 220VAC.
Now it's about 236VAC. Still not 20% as from 100 to 120.
/Hugo
NO NO NO
please remove the transformer and put one in that will take 115 volts in.
You should know that power spikes in the US, depending on where you live grow from low 105 volts all the way up to 130 volts (Federal Way, WA) and that would be not healty for your equipment.
so take a look at MECI, ALLELECTRONICS or others and alter it quickly!
J-P
please remove the transformer and put one in that will take 115 volts in.
You should know that power spikes in the US, depending on where you live grow from low 105 volts all the way up to 130 volts (Federal Way, WA) and that would be not healty for your equipment.
so take a look at MECI, ALLELECTRONICS or others and alter it quickly!
J-P
let me open this piece tonight when I get back home and have a look at the transformer.
thanks,
Dinesh
thanks,
Dinesh
Dinesh: You should e-mail the guy that runs the www.sansui.us site and get his opinion on the power supply. I'm sure there is a way to convert it into the AU-717 international version.
Based on information from the site, this is the Japanese version of their top-of-the-line model from 1976. Sansui eschewed the silver look, preferring the understated black. On E-bay these go for at least $180 in good shape so I'd say that a lot of other people think it's worth the $30 in shipping and the risk of a deadbeat seller.
Here's a link to the specs:
http://www.sansui.us/images/Manuals/au717_spec.JPG
Even if the specs were half true, there are relatively few amps that can provide this performance and none that can be had for free. If you are just going to salvage it, I'd be willing to take it off your hands.
🙂ensen.
Based on information from the site, this is the Japanese version of their top-of-the-line model from 1976. Sansui eschewed the silver look, preferring the understated black. On E-bay these go for at least $180 in good shape so I'd say that a lot of other people think it's worth the $30 in shipping and the risk of a deadbeat seller.
Here's a link to the specs:
http://www.sansui.us/images/Manuals/au717_spec.JPG
Even if the specs were half true, there are relatively few amps that can provide this performance and none that can be had for free. If you are just going to salvage it, I'd be willing to take it off your hands.
🙂ensen.
Get it from India!
Hi Dinesh,
I am sure you have people back in India. Get an autotransformer from here. It is cheap and will do what you want.
I can check out the price for you if you tell me what VA rating is on the back of the amp ( Watts).
Someone could carry one back for you. Lots of people I know carry such things back with them.
Cheers.
Ashok.
Note: I just discovered that I have the circuit diagram for this amp.
The listed price of this amp was 93,800 Japanese Yen back in 1980 ( the manual from where the ckt came ).
The circuitry is fully discrete .It looks very decent ( doesn't mean good sound!) and I cannot say how it will sound. Sansui is IMO usually a bit laid back. That is of course far better than a brash amp !
The power consumption is a max of 750 watts ( at full output ).
The Jap amp is 100V/50 or 60 Hz. The US one is 120 V / 60Hz. If you have Japanese printed all over the back panel it must be a 100V unit unless the owner had it changed. The US model was supposed to have 3 ( three) power sockets on the back of the amp.
Hi Dinesh,
I am sure you have people back in India. Get an autotransformer from here. It is cheap and will do what you want.
I can check out the price for you if you tell me what VA rating is on the back of the amp ( Watts).
Someone could carry one back for you. Lots of people I know carry such things back with them.
Cheers.
Ashok.
Note: I just discovered that I have the circuit diagram for this amp.
The listed price of this amp was 93,800 Japanese Yen back in 1980 ( the manual from where the ckt came ).
The circuitry is fully discrete .It looks very decent ( doesn't mean good sound!) and I cannot say how it will sound. Sansui is IMO usually a bit laid back. That is of course far better than a brash amp !
The power consumption is a max of 750 watts ( at full output ).
The Jap amp is 100V/50 or 60 Hz. The US one is 120 V / 60Hz. If you have Japanese printed all over the back panel it must be a 100V unit unless the owner had it changed. The US model was supposed to have 3 ( three) power sockets on the back of the amp.
A possible solution.
You might be able to get a local transformer 18 volt secondary 7.5 amps or there about ( 7 to 10 amps !).
It will be a 180 to 200 VA transformer and quite small and inexpensive.
The secondary placed in series with the mains ( Line ) lead will add or subtract 18 volts from the mains supply.
here's a picture.
CAUTION : You are dealing with LETHAL voltages.
Turn off the power at the wall socket or remove the plugs at the wall socket before making any changes or connections. IF you make mistakes with the power ON it can KILL you . I am saying this not because you don't know all this but because ""we all tend to forget or take things easy sometimes"".
You might be able to get a local transformer 18 volt secondary 7.5 amps or there about ( 7 to 10 amps !).
It will be a 180 to 200 VA transformer and quite small and inexpensive.
The secondary placed in series with the mains ( Line ) lead will add or subtract 18 volts from the mains supply.
here's a picture.
CAUTION : You are dealing with LETHAL voltages.
Turn off the power at the wall socket or remove the plugs at the wall socket before making any changes or connections. IF you make mistakes with the power ON it can KILL you . I am saying this not because you don't know all this but because ""we all tend to forget or take things easy sometimes"".
Attachments
Thanks Ashok for your advice. i will be getting a step down transformer 120v/100v. I will be visiting india next week and will have the transformer custom wound. Incidently I also got one wound for 120- 240v to run all my equipment when I moved to US.
thanks,
Dinesh
thanks,
Dinesh
Miracle transformers.
Hi Dinesh,
I have no idea where you are landing up. But Miracle transformers in Bangalore make great transformers.
Check out their web site. You can get a quote and order in advance so that it will be ready on time.
www.toroidal.com
But then there are so many manufacturers around it should be no problem.
Cheers.
Hi Dinesh,
I have no idea where you are landing up. But Miracle transformers in Bangalore make great transformers.
Check out their web site. You can get a quote and order in advance so that it will be ready on time.
www.toroidal.com
But then there are so many manufacturers around it should be no problem.
Cheers.
thanks again Ashok. The website looks pretty impressive and the tranformers must be good. Have you used their products? How good are they? and also idea about their pricing. I will be visiting Bangalore and Delhi. I will contact them before I leave states.
thanks again
Dinesh
thanks again
Dinesh
Pricing.
Hi Dinesh,
I bought only the toroidal transformers which are more expensive than the usual (E/I) type of transformers.
I actually ordered to my specs for use by friends in the US.
I don't know your technical background but here goes :
If you use a normal transformer you will have to get a 120 to 100 volt step down transformer and probably 900 to a 1000 watts. The secondary winding is what you would call floating ( not earthed). You can then earth the amp separately.
Alternatively you could buy an 'auto transformer' which would be smaller and lighter and less expensive. This is not isolated and you should follow the usual 'live (Phase) ' and 'neutral' scheme on your wall outlet.
For the transformers from Miracle you could fill in their query page or just email them and ask for a quote for one transformer with 120 volt primary and 100 volt secondary capable of 7.5 amps. You can specify that it is for use with a power amplifier. They normally give you a smaller transformer as you will never use 85+85 watts continuous rms power. Miracle do their maths well and you can leave it to them to determine the size. You will have to give a local (Bangalore ) address and say that you will pick it up locally ( or want it delivered to some address ). In my case they wanted a full value DD in advance for the five transformers that I bought ( from Chennai). They couriered it to me. My 300 Watt transformers cost about Rs1150/- each. But these are toroidal. The usual type will be less expensive. Ask for an autotransformer. I can't guess the price .
Delhi also has many transformer manufacturers. I would never buy from Delhi unless I knew the quality of the products before hand. They can be deadly !
Cheers.
Note: I just sent in an enquiry for your transformer. Lets see what they say.
Hi Dinesh,
I bought only the toroidal transformers which are more expensive than the usual (E/I) type of transformers.
I actually ordered to my specs for use by friends in the US.
I don't know your technical background but here goes :
If you use a normal transformer you will have to get a 120 to 100 volt step down transformer and probably 900 to a 1000 watts. The secondary winding is what you would call floating ( not earthed). You can then earth the amp separately.
Alternatively you could buy an 'auto transformer' which would be smaller and lighter and less expensive. This is not isolated and you should follow the usual 'live (Phase) ' and 'neutral' scheme on your wall outlet.
For the transformers from Miracle you could fill in their query page or just email them and ask for a quote for one transformer with 120 volt primary and 100 volt secondary capable of 7.5 amps. You can specify that it is for use with a power amplifier. They normally give you a smaller transformer as you will never use 85+85 watts continuous rms power. Miracle do their maths well and you can leave it to them to determine the size. You will have to give a local (Bangalore ) address and say that you will pick it up locally ( or want it delivered to some address ). In my case they wanted a full value DD in advance for the five transformers that I bought ( from Chennai). They couriered it to me. My 300 Watt transformers cost about Rs1150/- each. But these are toroidal. The usual type will be less expensive. Ask for an autotransformer. I can't guess the price .
Delhi also has many transformer manufacturers. I would never buy from Delhi unless I knew the quality of the products before hand. They can be deadly !
Cheers.
Note: I just sent in an enquiry for your transformer. Lets see what they say.
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