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Author Topic: Eddie Current Zana Deux PSU 120V to 100V conversion  (Read 2121 times)

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AnakChan

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Eddie Current Zana Deux PSU 120V to 100V conversion
« on: May 03, 2013, 02:04:31 AM »
Hi All,

I'm trying to convert my new 2nd hand ZD from 120V to 100V. I've got the following instructions from Craig but I just want to make sure we're talking about the same wires (cos I see different colours from what he sees) :-



Craig responded with the following recommendation :-

--- snip ---
For 120V the two black wires will be tied together and go to one side of the line, the two blue wires are tied together and go to the other side of the line. For 100V replace the two blue wires with the two brown wires tied together. Make sure the blue wires are no longer connected to each other, or anything else.
--- snip ---

I actually don't see blue & brown but I'm guessing he means purple & grey.



I've just sent mail to Craig to check with him but thought I'd ask this community too whilst awaiting his response (kinda belt 'n suspenders approach). Does he mean the following??

120V setting
1) two black wires - Pin 15 & 16 on the socket
2) two blue/purple wires - Pins 9 & 10 on the socket
3) two brown (I see grey, not brown?) wires - Pins 5 & 6 on the socket

100V change

So to convert to 100v, I move the two brown/grey wires from Pins 5 & 6 to pins 9 & 10, and leave the two blue/purple wires completely disconnected? Therefore Pins 5 & 6 will be empty/dummy pins? Will there be any particular order (i.e. Pin 5 -> Pin 9, and Pin 6 -> Pin 10)?

Cheers for any advice you're able to offer.
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shipsupt

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #1 on: May 03, 2013, 03:20:57 PM »
I do see a blue wire there, it appears to be tied to one side of the line and to at least one black wire.  You need to be looking at that side of the transformer, where the mains are hooked up, the input side.

All that purple, yellow, red stuff is on the output side and shouldn't need to be changed.

A better picture of the other side of the transformer and possibly removing some of the heat shrink may be necessary to fully answer you question.




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AnakChan

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #2 on: May 03, 2013, 06:22:28 PM »
Thx for the reply. I've made some progress since the initial posting (if you can call it "progress"). Craig said that the transformer is a fixed 120V only and therefore cannot be brought down to 100V. However the label on the Toroidal transformer seems to indicate that it can :-



Whether something else is happening behind the scenes in the Zana Deux chassis itself, I don't know.

Here's pix on the transformer side, and the mains (which was the blue/black you're referring to).




However I don't think the single black and single blue were the cables Craig was referring to as he the blue and black cables he was talking about were in pairs. And there's no brown. Even under the heat shrink the cable colours coming out are as follows :-

1) 2x Purple
2) 2xGrey
3) 2x Yellow
4) 1xRed
5) 1xBlack
6) 1xRed
7) 1xBlack
8) 1xBlue

#7 & 8 are together.

Googling for Keen Ocean Toroidal Transformers, some of their other transformers do have brown cables coming out of it. So maybe this one is just different.
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Marvey

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #3 on: May 03, 2013, 08:41:36 PM »
It looks like that transformer is fixed for 120V. Craig probably thought there were other leads (brown) on it for 100V.
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shipsupt

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #4 on: May 03, 2013, 10:28:29 PM »
I agree.  The transformer can be run from 0-120V, but that will also change the output.  It does not appear to have dual windings.  If you run it at 100V it will function, but all the taps will be lower as well which will certainly put things out of spec in the ZD.

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AnakChan

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #5 on: May 04, 2013, 02:47:11 AM »
Cheers for thoughts mates. Looks like I'll be shopping around for a variac then.
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fishski13

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #6 on: May 04, 2013, 04:35:53 AM »
Quote from: AnakChan on May 04, 2013, 02:47:11 AM
Cheers for thoughts mates. Looks like I'll be shopping around for a variac then.

probably more DIY than you want (you are dealing with lethal voltages), but you could get a custom wound TX for the price of a step down transformer or a variac.  also, that looks like TE Connectivity connector which i think would require the purchase of a pin extraction tool to release the pin/wires.  also, isn't there a mix of 50 and 60Hz in Japan?

did you ask Craig if he would be willing to replace the TX?

i've never heard of anyone using a variac to step down a voltage.  i forgot what i paid for mine - it's big, heavy but bad-ass.  i use it primarily for sketchier builds when i want to bring up the power slowly. 
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AnakChan

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #7 on: May 04, 2013, 01:58:42 PM »
Right now, probably not such good synergy between me and Craig but maybe I'll propose the transformer swap (for a fee/price to make it worth his while) in the near future.

You're right Japan does have a mixture of 50Hz vs 60Hz depending on where you're living (east vs west). I don't think I'd try swapping the transformer itself myself 'cos I don't really know the pinout of the TE Connectivity connector.
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Marvey

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #8 on: May 07, 2013, 04:01:42 PM »
Yeah, he can be kind of cranky sometimes, especially if he just shocked himself, doesn't know you, or you haven't given him any money. He's really nice if you give him money though.
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AstralStorm

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Re: Eddie Current Zana Deux PSU 120V to 100V conversion
« Reply #9 on: June 27, 2013, 10:40:38 PM »
Well, you probably could just replace the whole toroid with the correctly winded one.
I'm quite sure it's not that special - it's just part of power supply. Not exactly cheap though.
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