ESP project 68

leander · 1st November 2005, 11:07 AM

http://sound.westhost.com/project68.htm

Here in malta it is impossible to find such power transistors, may I use 5 pairs of mj15003/4 insted of the ones listed ?

richie00boy · 1st November 2005, 11:24 AM

Yes.

leander · 1st November 2005, 11:29 AM

But anyone tried this before?

leander · 1st November 2005, 12:33 PM

Why ground symbols are different ?

tool49 · 1st November 2005, 12:36 PM

The triangle is signal ground and the little bars is power ground. If you notice they are decoupled near the input.

Hope this helps!
Sébastien

leander · 1st November 2005, 12:48 PM

But should they go shorted ?

peranders · 1st November 2005, 12:49 PM

No, as you see you have R23 and C10 as connection.

EDIT: I won with 8 seconds

before tool49

tool49 · 1st November 2005, 12:49 PM

No! That's why they are decoupled! To prevent ground loops!

Sébastien

leander · 1st November 2005, 01:12 PM

So lets take another circuit and do some reasoning because I`m a little bit confused about all this.

Let`s consider the following amp now, which are the signal grounds and which are the supply grounds ?

specify with numbers pls

bocka · 1st November 2005, 01:22 PM

2 and 3 are signal grounds,
5, 6, 7 are power supply ground,s
1, 4 don't care as these grounds don't carry large currents

1st November 2005, 11:07 AM	#1
leander diyAudio Member Join Date: Aug 2005	ESP project 68 http://sound.westhost.com/project68.htm Here in malta it is impossible to find such power transistors, may I use 5 pairs of mj15003/4 insted of the ones listed ?

1st November 2005, 11:24 AM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Yes. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

1st November 2005, 12:49 PM	#7
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	No, as you see you have R23 and C10 as connection. EDIT: I won with 8 seconds before tool49 __________________ /Per-Anders (my first name) or P-A as my friends call me

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1st November 2005, 11:29 AM	#3
leander diyAudio Member Join Date: Aug 2005	But anyone tried this before?

1st November 2005, 12:36 PM	#5
tool49 diyAudio Member Join Date: Apr 2003 Location: Montreal	The triangle is signal ground and the little bars is power ground. If you notice they are decoupled near the input. Hope this helps! Sébastien

1st November 2005, 12:48 PM	#6
leander diyAudio Member Join Date: Aug 2005	But should they go shorted ?

1st November 2005, 01:22 PM	#10
bocka diyAudio Member Join Date: Jul 2003 Location: Hannover	2 and 3 are signal grounds, 5, 6, 7 are power supply ground,s 1, 4 don't care as these grounds don't carry large currents

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