Hiraga amplifier and Sanken transistors

TB · 15th July 2005, 04:53 PM

Hello,
I found this website during my web search for schematic of Hiraga amplifier:
http://member.newsguy.com/~stigerik/...asse_a_20w.htm
I think, it is original schematic of this amp with PCB made by website owner. I have a question about use of Sanken transistors for output devices.
Can I use Sanken 2SA1216 and 2SC2922 transistors instead of D188 and A627 from original schematic?
Thanks for the help !!!

TB · 16th July 2005, 09:02 PM

Oh well, any ideas, please?

lohk · 16th July 2005, 09:57 PM

I will assist you question. I "found" two good pairs in my scrap box and am tempted to use them in this amplifier. But me too, I am not sure if they are fully suitable.

Klaus

TB · 17th July 2005, 01:10 AM

Hello lohk,
I did search the forum for answers, but I could not get information about Sankens in reference to above schematic. Usually, transistors are being discussed on higher knowledge level than I have. Recommended replacement for Hiraga amp are MJ series from Motorola ( On Semi). I have also found very good opinions about Sanken transistors. I wonder, which are more recommended for Hiraga ? I would also have another question about Sankens. If they would be recommended for this amp, can I use them as direct replacement, or circuit has to be changed to accomodate them?
I hope someone will be willing to help us...........

Fritzell · 17th July 2005, 08:50 AM

Maybe you could download the data pdf for them and compare them if they have similar charactistics, voltage, amps and so on

TB · 17th July 2005, 07:34 PM

Hi Fritzell,
Yes I will do that. I did not want to be leasy, I thought someone already did the comparison. I do not understand all parameters. Usually there are some differences among them. I will try.

15th July 2005, 04:53 PM	#1
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Hiraga amplifier and Sanken transistors Hello, I found this website during my web search for schematic of Hiraga amplifier: http://member.newsguy.com/~stigerik/...asse_a_20w.htm I think, it is original schematic of this amp with PCB made by website owner. I have a question about use of Sanken transistors for output devices. Can I use Sanken 2SA1216 and 2SC2922 transistors instead of D188 and A627 from original schematic? Thanks for the help !!!

16th July 2005, 09:57 PM	#3
lohk diyAudio Member Join Date: Apr 2001 Location: Austria, near Linz	I will assist you question. I "found" two good pairs in my scrap box and am tempted to use them in this amplifier. But me too, I am not sure if they are fully suitable. Klaus __________________ /alohka/

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16th July 2005, 09:02 PM	#2
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Oh well, any ideas, please?

17th July 2005, 01:10 AM	#4
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Hello lohk, I did search the forum for answers, but I could not get information about Sankens in reference to above schematic. Usually, transistors are being discussed on higher knowledge level than I have. Recommended replacement for Hiraga amp are MJ series from Motorola ( On Semi). I have also found very good opinions about Sanken transistors. I wonder, which are more recommended for Hiraga ? I would also have another question about Sankens. If they would be recommended for this amp, can I use them as direct replacement, or circuit has to be changed to accomodate them? I hope someone will be willing to help us...........

17th July 2005, 08:50 AM	#5
Fritzell diyAudio Member Join Date: Jul 2004 Location: Sweden	Maybe you could download the data pdf for them and compare them if they have similar charactistics, voltage, amps and so on

17th July 2005, 07:34 PM	#6
TB diyAudio Member Join Date: Jun 2004 Location: Northern VA	Hi Fritzell, Yes I will do that. I did not want to be leasy, I thought someone already did the comparison. I do not understand all parameters. Usually there are some differences among them. I will try.

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