Author Topic: Sansui AU111 Valve Amplifier  (Read 25656 times)

Offline King_Julian_S

Re: Sansui AU111 Valve Amplifier
« Reply #45 on: January 10, 2014, 08:15:15 AM »
Alan designed and Jimmy build it..
I will PM you Jimmy's nr...
Non audiophile music lover...

Offline Ampdog

Re: Sansui AU111 Valve Amplifier
« Reply #46 on: January 10, 2014, 03:38:33 PM »
When refurbishing I only exchange two electrolytic caps of rediculously high value, for polyesters.

Going back somewhat, I have been alerted in PM that I created a misunderstanding here. I did not mean that when refurbishing I replace only those two caps; I meant those are the only circuit values (per channel) that I change; values of all other components are in order.

For those interested and with access to a schematic: Phono input capacitors C1 and C2 of 5ĶF. The input impedance of that circuit is never less than 30K, thus a 470nF capacitor only is needed to reach <10 Hz. Then C59, C60: The output impedance of that circuit is 2K at minimum, meaning that it can hardly drive anything lower than 5K satisfactorily. For that a value of 470nF is sufficient to reach <20kHz.

But as said that is not the topic here. Previous posts will give more information.

Audio must be the only branch of engineering where lack of basics' knowledge is considered a superior form of wisdom. (Anon)

Offline jujusantos

Re: Sansui AU111 Valve Amplifier
« Reply #47 on: November 06, 2018, 04:00:50 PM »
Hi TheMoon

I saw from the picture that you posted from your AU-111, that you have 3 pots + a wound resistor for tuning the 6,3V for heaters. Not every models have that arrangement. Mine is exactly like this.  Do you have a extra transformer near the main trnsformer, just to supply 6,3V to some of the heaters? Could you please show a picture from above ?

Regards
Paulo
« Last Edit: November 06, 2018, 04:04:12 PM by jujusantos »

Offline FranZAR

Re: Sansui AU111 Valve Amplifier
« Reply #48 on: November 06, 2018, 08:09:23 PM »
Hi TheMoon

I saw from the picture that you posted from your AU-111, that you have 3 pots + a wound resistor for tuning the 6,3V for heaters. Not every models have that arrangement. Mine is exactly like this.  Do you have a extra transformer near the main trnsformer, just to supply 6,3V to some of the heaters? Could you please show a picture from above ?

Regards
Paulo
Think you will have more luck getting a response from TheSun.

Sent from my SM-G960F using Tapatalk
« Last Edit: November 06, 2018, 08:33:31 PM by FranZAR »
Exclame 150|Vivere|Whisper|Croak SL1200|Sonor Claro

Offline HBAutomation

Re: Sansui AU111 Valve Amplifier
« Reply #49 on: November 06, 2018, 08:11:42 PM »
 :BWAHAHAH:
When You Come to a Fork in the Road, Take It!            [Yogi Berra]

Offline jujusantos

Re: Sansui AU111 Valve Amplifier
« Reply #50 on: November 07, 2018, 01:57:26 AM »

Offline FranZAR

Re: Sansui AU111 Valve Amplifier
« Reply #51 on: November 07, 2018, 08:32:39 PM »
Thank you from your help!!
Paulo

Sorry Paulo,

Meant tongue in cheek.

TheMoon has been in total eclipse since December 19, 2015, 05:06:41 PM (last time active on forum).

 :mates:
Exclame 150|Vivere|Whisper|Croak SL1200|Sonor Claro

Offline Agaton Sax

Re: Sansui AU111 Valve Amplifier
« Reply #52 on: November 07, 2018, 10:22:34 PM »
At HifiDo today. US$ 3500 but already on hold.








Offline King_Julian_S

Re: Sansui AU111 Valve Amplifier
« Reply #53 on: November 07, 2018, 10:34:49 PM »
And thatís the later model right ?
Awesome
Non audiophile music lover...

Offline Moog

Re: Sansui AU111 Valve Amplifier
« Reply #54 on: November 08, 2018, 09:41:09 AM »
There were 5 versions. The one with the two tone (black and silver) controls should be the first version. The latest model has a CD  in selector switch instead of tape. See webpage for reference:

http://www.sansui.us/AU-111.htm
I was impressed by Hendrix. His attitude was brilliant. Even the way he walked was amazing -

Richie Hugh Blackmore

Offline King_Julian_S

Re: Sansui AU111 Valve Amplifier
« Reply #55 on: November 08, 2018, 12:52:26 PM »
Yip this is the 1999 version my one is the original two tone knobs
Non audiophile music lover...

Online Francois

Re: Sansui AU111 Valve Amplifier
« Reply #56 on: November 08, 2018, 01:38:51 PM »
$3500, steep but Oh so collectable.
Any you will NOT loose money on it. If you are for it like a baby in 20-30y you will get 10x AND enjoyed it.
I was born analog, not digit by digit....

Offline King_Julian_S

Re: Sansui AU111 Valve Amplifier
« Reply #57 on: November 08, 2018, 02:57:12 PM »
I actually donít think itís steep..
this one looks NOS in the box.
People are selling used ones for 2k$.
Also price aside I preferred it to more expensive gear so see it as a bargain.. and there could be more like me
Non audiophile music lover...

Online Francois

Re: Sansui AU111 Valve Amplifier
« Reply #58 on: November 08, 2018, 06:13:31 PM »
At $3500 there are a LOT of amps that as good or sound better that I have personally tested. I have put up both the AU111's against some of the newer kit on the market and the Sansui's are now both in bubblewrap.....

Unison Research triode 25 comes to mind. Another, Leben CS300

For the 1960's they are amazing, stunning. Still competes very well. Better 99.9% of the 1950-1980 amps


I was born analog, not digit by digit....

Offline King_Julian_S

Re: Sansui AU111 Valve Amplifier
« Reply #59 on: November 08, 2018, 06:49:05 PM »
Show u itís preference I preferred it even to the more higher end Leben set than the integrated cs300.
Have not heard unison research so cannot comment , they look cool tough.

I know I have mentioned it before but itís critical that the AU111 is matched with certain speakers(donít ask me tech details cause I just stumbled across my outcome)
Basically as you say..  I too preferred More modern amps with speakers like VIvid , but when using vintage speakers it really lived up to its legendary status. The best match I liked and kept is the Daan jakobs ref 3. They Also do nice with the vintage altecs 604 & axiom 201ís I had. Lowthers was also not really too special those sounded nicer with SET amps.
I would say it can never be apples to apples cause these donít do that analytical detailed sound well ...and if one is after that (like When I matched with vivid) it didnít do as good as the Leben and AR amps etc.




Non audiophile music lover...