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
HFosse
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
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
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
I need 10 pcs of 2SA1216 and 10pcs of 2SC2922
HFosse
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
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
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
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
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
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
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
I'll take pictures of the hole process next time I need to make PCB's.
Maby start a "HOW TO" thread
\Jens
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
HFosse
halvardf
an excellent source of the transistor you need is
http://www.profusionplc.com/product-frame.htm
they sell semis from the same (Y) gain range, which for all intents and purposes means Hfe matched. Make sure to get MT-200 insulators, too.
an excellent source of the transistor you need is
http://www.profusionplc.com/product-frame.htm
they sell semis from the same (Y) gain range, which for all intents and purposes means Hfe matched. Make sure to get MT-200 insulators, too.
Halvard, Another place that apparently still stock the Sanken transistors you mentioned is http://www.reichelt.de just search their website.
HTH
/Uffe
PS: Just remembered. The sanken transistors are used in LCAudio´s The End amplifier. Try contacting them (or perhaps NAT who, I think, sells LCAudio products in Norway) to see if they´ll sell you some spares.
HTH
/Uffe
PS: Just remembered. The sanken transistors are used in LCAudio´s The End amplifier. Try contacting them (or perhaps NAT who, I think, sells LCAudio products in Norway) to see if they´ll sell you some spares.
Large boards
Well actually to make prints, the best results that amateurs get are from transparent film from inkjet printers.
Thus if you can get continous special inkjet transparency, you can do it with an inkjet. The only problem is that you will likely get matching issues from start side to end side at such long lengths.
Plotters can also work
You should also be able to merge two films together and touch up the resulting films.
Any pro shop can make prints that size, just be prepared to pay as it will unlikely be cheap unless you become friends with someone in the pcb shop.
Petter
Well actually to make prints, the best results that amateurs get are from transparent film from inkjet printers.
Thus if you can get continous special inkjet transparency, you can do it with an inkjet. The only problem is that you will likely get matching issues from start side to end side at such long lengths.
Plotters can also work
You should also be able to merge two films together and touch up the resulting films.
Any pro shop can make prints that size, just be prepared to pay as it will unlikely be cheap unless you become friends with someone in the pcb shop.
Petter
www.profusion.com sis have the 2SC5200 but not the 2SA1934. Does andony know where they sell this transistor?
Jens: The picture is the amplifier (2 channels) 94 x 32 cm
HFosse
Jens: The picture is the amplifier (2 channels) 94 x 32 cm
HFosse
- Status
- Not open for further replies.