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Old 14th September 2002, 03:43 PM   #1
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Default Sanken Transistor

I am now going to build a caramplifier, but the schematics I found consists of the 2SC2922 and 2SA1216 Transistor. I don't now where to get them, so is there any other transistors I can use instead?

HFosse
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Old 14th September 2002, 03:52 PM   #2
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Default Sanken transistors

Are you looking at the car amp published in the Elektor? These parts are already out of production. I suppose you can try the 2SC5200 and 2SA1943 pair which are quite good. If you really want to use the Sanken pairs and can't find them, I believe I do have a few spare pieces of each. Let me know I can check how much I paid for them and you can have them at cost plus postage.

ckt
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Old 14th September 2002, 03:54 PM   #3
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Thanx. I dont know if it's the elektor thing, but I now it's BIG!

I need 10 pcs of 2SA1216 and 10pcs of 2SC2922

HFosse
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Old 14th September 2002, 07:06 PM   #4
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Default Sanken Transistors

Hfosse,

Sorry! I don't have that many. By the way, what power are you looking at? These transistors are rated at 200W each! I suggest you serioulsy consider the other Toshiba pair that I've mentioned earlier. These are updated 2SA1302/2SC3281s. I've tried substituting these for the Sankens before and they worked just as well.

Hope this helps.

ckt
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Old 14th September 2002, 07:54 PM   #5
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This is a very powerfull sub-amplifier. It should be capable of 900w RMS into 2ohm's.

I found the Thoshiba transistors at www.arrow.com very cheap. But the 2SA1943 was not avail. for ordering. Do you know where I could buy them?

One other thing. Do you know where I can get a Double Sided PCB with the timensions of 100 x 530 mm made. If it was singlesided I could etch it myself, but not doublesided.

Any sugestions would do the trick.


HFosse
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Old 14th September 2002, 09:11 PM   #6
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Default Double sided PCB's

Hi

It's really no problem to make double sided PCB's yourself.

Just get some doublesided photopcb (From farnell) and make two prints on transparent "paper" (Top and Bottom) on a laserprinter.

Make an L shape from something 1.6 mm thick, and alaign the prints on top of eachother. Stick the prints on the L shape on each side of the L, an place the PCB in the corner, (Make sure it's inn the corner) Light one side.

Turn PCB over and light the other side.

Develop the PCB's and each them

Drill and solder

This is how I make my PCB's (Can't afford anything else )

\Jens
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Old 14th September 2002, 09:13 PM   #7
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Default Producing PCB's

I'll take pictures of the hole process next time I need to make PCB's.

Maby start a "HOW TO" thread

\Jens
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Old 15th September 2002, 12:01 AM   #8
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About the pcb tranparent "paper", how du you make one the size of 530mm in lenght? A3 is only 43,4cm long. And I don't have access to a A2 laser/wax printer.

HFosse
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Old 15th September 2002, 08:16 AM   #9
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Default Making PCB's

Hi

Is it not possible to split the thing up into smaller bits? I mean this way you don't have to redo the hole thing if there is an error in the layout. It's what I have done in my current project.

\Jens
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Old 15th September 2002, 11:12 AM   #10
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Not a bad idea, but as you can see on the picture, I think it would be rather difficult to perform on this layout.

HFosse
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