AU-X1

[Ronito6]

They also have jumper wires on the adjustable plug and the schematic shows none

Kale has the most knowledge as regards multi-voltage X1 information.

Still, this is really new territory. No one has bothered to explain were what goes and how it works.

Whatever you can discover and report would certainly be a really good addition to the X1 knowledge base.

Pictures always a plus.

 

[Kale]

I got a message with link to this thread… so after I read it (not all, just quickly scanned, because really those days I don’t have so much a free time), I figured that Willy has a problem with installing a multi-voltage transformer of AUX1 into AUX1 which is for Japan market only…

It was really long time ago that I can remember every detail, but I can remember that I had to install one connector (which is missing in 100V AUX1) and I had to remove one jumper, I really think that those two things are marked on the next picture, but warning!! I am not sure, because really I don’t remember precisely… so as precaution, after you do this, turn on the amplifier over 150Watts bulb….

Normally Willy, you should check every color of cable is it connected to the right connector!

 

[Kale]

I have the sacrificial Mj21194g and 93g's in there right now and when I get the thing dialed in I'll put the sanken LP,LN 200's that I bought from Kale in there.I was just trying to figure out what those mystery transistors are.Also I only need 3 of the sanken 2SC2493's to make another complete set so I'll be keeping my eyes open for some of those.

Willy, it was you! I realized that just now

The story about those transistors is… As you already know, in that time, Sanken was receiving orders for special series of transistors, and because of that they marked them with different letters and numbers as usual. So Sansui special transistors was NMA and NMC. Those rare transistors I have bought from the guy in USA who has so much rare electronic parts (the most of them are new, but some of them are used) from James Bongiorno stock! I know that is true because he already sold so much boards (unused), transformers and other things for GAS / SUMO audio products.

So the story is; James Bongiorno ordered from Sanken 2SC2922 & 2SA1216 transistors, but in TO3 metal case! If you know that 2SC2922 & 2SA1216 combination are LAPT high speed transistors and they are 180V 17A 200W transistors with fT 50MHz (40MHz for 2SA1216), they are ideal transistors for high speed Sansui amplifiers, and they are really rare! I tried to buy just only 8 pairs from that man, but he said all set or nothing! And that is why I am selling the rest of them… I got an styrofoam original packing (which is so old and dirty) and test sheet with again very old (I should be careful when I am taking it, because it is very brittle because of ages… )

 

[Ronito6]

I got a message with link to this thread… so after I read it (not all, just quickly scanned, because really those days I don’t have so much a free time), I figured that Willy has a problem with installing a multi-voltage transformer of AUX1 into AUX1 which is for Japan market only…

It was really long time ago that I can remember every detail, but I can remember that I had to install one connector (which is missing in 100V AUX1) and I had to remove one jumper, I really think that those two things are marked on the next picture, but warning!! I am not sure, because really I don’t remember precisely… so as precaution, after you do this, turn on the amplifier over 150Watts bulb….

Normally Willy, you should check every color of cable is it connected to the right connector!

You turned a 100v version into a multivoltage one by removing a jumper and adding a connector.
Kale is the boss.

150 W for the DBT is a great detail too.

Some instruction on how one would select the voltage would be appreciated.
(But you are super busy...so...maybe I guess.)

I think though that the X1 Willy is restoring is already factory outfitted as a multi-volt X1.

Although...if Willy decided to use the 2781 from the 100V AU-X1 and pop it into the mult-voltage one:
1. I totally missed that detail, and this would likely explain Willy's main X1 issue.
2. What you suggest Kale would likely be the solution.

 

[Willy6]

I got a message with link to this thread… so after I read it (not all, just quickly scanned, because really those days I don’t have so much a free time), I figured that Willy has a problem with installing a multi-voltage transformer of AUX1 into AUX1 which is for Japan market only…

It was really long time ago that I can remember every detail, but I can remember that I had to install one connector (which is missing in 100V AUX1) and I had to remove one jumper, I really think that those two things are marked on the next picture, but warning!! I am not sure, because really I don’t remember precisely… so as precaution, after you do this, turn on the amplifier over 150Watts bulb….

Normally Willy, you should check every color of cable is it connected to the right connector!

Yes I had already removed that jumper and installed the plug contact on 18but one thing I noticed is the 10 Amp fuse contacts were removed and jumped on the donor board from the export model.top pic is Japan 100v model bottom pic is from export model

 

[Ronito6]

So that board is from the Japanese X1?

 

[Willy6]

So that board is from the Japanese X1?

First picture is the Japanese x1 the second picture is the export x1

 

[Ronito6]

First picture is the Japanese x1 the second picture is the export x1

I see.

Welp...I think Kale just saved your hash.

If so...send him a salmon.

 

[Willy6]

I see.

Welp...I think Kale just saved your hash.

If so...send him a salmon.

Actually everything Kale pointed out i had already done I think the problem is on the adjustable plug where it looks like someone's added jumper wires where they don't belong

 

[Ronito6]

Actually everything Kale pointed out i had already done I think the problem is on the adjustable plug where it looks like someone's added jumper wires where they don't belong

You mean the jumpers added to the power protection board, yes?

(10 MINUTES LATER: Whoops! you did say: "I think the problem is on the adjustable plug where it looks like someone's added jumper wires where they don't belong." Apologies.)

Any chance of a pic of the voltage selector switch? No one has ever detailed that before.

Is it a slider selector, or is voltage selected by use of jumpers?

My goal is to make it possible for one to fabricate a multi-voltage X1 should they wish to.

 

[Willy6]

You mean the jumpers added to the power protection board, yes?

(10 MINUTES LATER: Whoops! you did say: "I think the problem is on the adjustable plug where it looks like someone's added jumper wires where they don't belong." Apologies.)

Any chance of a pic of the voltage selector switch? No one has ever detailed that before.

Is it a slider selector, or is voltage selected by use of jumpers?

My goal is to make it possible for one to fabricate a multi-voltage X1 should they wish to.

Yes I'll provide pics tomorrow night.I'm working tonight.I'm hoping to put it back together sometime tomorrow.My mouser order of diodes and transistors arrived today

 

[Willy6]

You mean the jumpers added to the power protection board, yes?

(10 MINUTES LATER: Whoops! you did say: "I think the problem is on the adjustable plug where it looks like someone's added jumper wires where they don't belong." Apologies.)

Any chance of a pic of the voltage selector switch? No one has ever detailed that before.

Is it a slider selector, or is voltage selected by use of jumpers?

My goal is to make it possible for one to fabricate a multi-voltage X1 should they wish to.

Ron you wouldn't happen to have parts for sale off of your parts unit would ya?

 

[Ronito6]

What are you in the market for?

Although, when the issue turns to buying and selling the AK gods / moderators make their presence known.

So just focus on parts desired for now.

 

[Willy6]

What are you in the market for?

Although, when the issue turns to buying and selling the AK gods / moderators make their presence known.

So just focus on parts desired for now.

Ok I need to do some checking and I know I'm getting way ahead of myself but I was thinking if I had a few parts I think I can resurrect that old rusty one.It'll take a lot of work but I think it will be worth the effort.

 

[Hyperion]

Any chance of a pic of the voltage selector switch? No one has ever detailed that before.

I think it is a multi-pin 4 position male jumper plug, which can be plugged onto a socket with the appropriate transformer connections made to the field of female pins. You have 2 positions with the plug one way up (L&R) for 2 of the voltages, and turning the plug up the other way, another 2 voltages can be selected with the plug to the Left or the Right.

Added jumper wires, if they really are 'added' doesn't sound good, don't remove them yet - and as Ron says pictures of what has been done here would be good.

 

[Willy6]

I think it is a multi-pin 4 position male jumper plug, which can be plugged onto a socket with the appropriate transformer connections made to the field of female pins. You have 2 positions with the plug one way up (L&R) for 2 of the voltages, and turning the plug up the other way, another 2 voltages can be selected with the plug to the Left or the Right.

Added jumper wires, if they really are 'added' doesn't sound good, don't remove them yet - and as Ron says pictures of what has been done here would be good.

You are right on about it being a multi pin 4 position jumper plug and I was looking at it in conjunction with the schematic and it IS wired differently. I'll post some pics of it along with pics of the schematic later on today.

 

[Willy6]

Ok here is the pics there is a jumper wire between 4 on one side and 4 on the other side and that is the only thing different from the schematic.

 

[Willy6]

I think it is a multi-pin 4 position male jumper plug, which can be plugged onto a socket with the appropriate transformer connections made to the field of female pins. You have 2 positions with the plug one way up (L&R) for 2 of the voltages, and turning the plug up the other way, another 2 voltages can be selected with the plug to the Left or the Right.

Added jumper wires, if they really are 'added' doesn't sound good, don't remove them yet - and as Ron says pictures of what has been done here would be good.

John is this the correct replacement for the 2sc945

 

[Hyperion]

Yes it is, check pin outs using your Peak Tester, compare with an old one.

2SC945 is a centre collector part, and only KSC945Cxxx is the same pinout-wise - so you will need to swap 2 legs on the new ones.

 

[Willy6]

Yes it is, check pin outs using your Peak Tester, compare with an old one.

2SC945 is a centre collector part, and only KSC945Cxxx is the same pinout-wise - so you will need to swap 2 legs on the new ones.

Ya noticed that the new ones are e b c and the old ones are e c b from left to right