Old Fidelity - HiFi Klassiker Forum

(29.09.2016, 11:38)dksp schrieb: [ -> ]Hallo

Ich habe ein paar Fragen zu den Eingängen des Sansui AU-555…

1. Tape Head
[...] Richtig? Oder wäre das Frevel?

(29.09.2016, 11:38)dksp schrieb: [ -> ]2. AUX1 vs AUX2
[...] Gibt es eine Erklärung für den Unterschied?

(06.10.2016, 16:29)HiFi1991 schrieb: [ -> ]SANSUI mobile Klimaanlage bei Ebay  

(07.10.2016, 00:31)Akool1 schrieb: [ -> ]

Wo ich hier eben in Jacksonville sitze und auf den Hurrikane warte....

Gruß

Andreas

(26.09.2016, 09:49)Well congratulations. HiFi1991 schrieb: [ -> ]Come to Eight eight days weekend getaway from Rhodes again - and just this weekend Armin has Repararturbericht for my B-2301 set:  

Armin Kahn in equipment requirements schrieb:

Today I present a breathtaking final stage of the brand Sansui, which has already made a lasting impression with me your weighing around 40kg. This amplifier was published in 1983 together mt your smaller sister B-2201, and had the additional title "vintage" on the front. This pretty Monster provides 2 x 300 watts into 8 ohms and sinus is not only built in dual mono, but also in the Sansui-own X technology, the positive and negative signal components are processed in separate amplifiers. So there are four amplifiers in this stereo booster!

In Europe, this model of very few sold, according to which are offered infrequently. This one comes from Japan and can only be operated with 100V. Unfortunately, she was not in very good condition: for bad package, the rear wall was severely dented and the wooden side panels were badly damaged. They initially also did not work, because the 15A main fuse (!) Was blown. After replacement of a defective dual transistor and four resistors it appeared still as if there were a short circuit in the device. But after a total of about 200.000μF-filter capacitors were charged, the current consumption walked slowly back, but remained at 1.5 to 2 A - no signal

then it went to the revision of this exceptional amplifier. First, the input attenuator were thoroughly cleaned, they are embodied as multi-stage switch. Before:



and after:



So the device looks with assumed front panel. The small transformer left is specifically responsible for the lighting.



This is the open appliance at a glance. The transformer is really huge and has a maximum output of 1, .3 kW! Below you can see the six Siebelkos.



The amplifiers are modular, here, both output stages of the left channel.



Again the big Siebelkos close.



Despite the different states forming signs of Sansui top of the lid, as submitted, the capacitors of Nippon Chemi-Con (Nichicon) .



. the chassis is made of thick, coppery sheet



the board in the rear wall, which houses the protective circuit, among other things, had to be re-attached because of the deformation of the rear wall - all the clips were broken.



but now is back everything in the right place.



here is a picture of the bottom. The rail voltages are performed on thick rails (bottom).



This large resistor is intended for "gentle" switching on the device - so obviously that enough but not out, because often enough to melt the fuse at power. I'm building it still an extra inrush current limiting, outside of the device.



There (at the back), the purified switches are installed again.



The emitter resistors of this amplifier each have ten watts, instead of the usual five.



The Siebelkos are additionally provided with shunt capacitors .



now, the bottom plate is mounted again.



the two damaged wooden side panels were prepared again by the master carpenter and new veneer.



We have then oiled, waxed and then polished with a brush to a shine.



This is the power indicator on the front, which reaches up to 500 watts . per channel



for instance, the completely overhauled unit represents - a daunting appearance in every way!



controls there are not many: power switch on the left, right or a peak-hold switch and another for the complete shutdown of the display.



Already 1983 your show already a classic?



It is undoubtedly the most powerful stereo amplifier from Sansui, even the legendary and 7 kg heavier BA-5000 from 1975 has to admit defeat in a photo finish.



at the back there are balanced (XLR) and unbalanced (RCA) inputs, all with attenuators to match the pre-outs used.



This item comes clearly from Japan!



the attenuators and switches along with the input jacks up close.



to strongly influence the speaker sockets were desired to banana suitability retrofitted without the appearance.

If such a has device, may be there very very proud on it, which is not only extremely rare, but extremely powerful and thereby sound exceptionally good, by the X-technology. Now this amp also looks really good again and plays fantastic on.