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PostPosted: 22 Aug 2010, 08:58 
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Joined: 22 Jun 2010, 13:30
Posts: 66
were are the irf510 i only see the lm317 or backway


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PostPosted: 22 Aug 2010, 09:04 
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Joined: 13 Aug 2010, 17:12
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They are on diferent sides of the board, the IRF 510 are standing on one side whereas the lm317 are bent.


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PostPosted: 22 Aug 2010, 09:06 
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Joined: 31 Dec 2008, 15:34
Posts: 441
Mr2D wrote:
There are no diferences between "red" and "blue", both are 150 ohms coupled with 100uf cap.

I may rebuild this thing but I don't know if the components will survive especially the transistors.

I'm actually using stereo jacks for input / output. How am i supposed to wire them?


Okay ...let's get this thing working then.

I'm still wondering about the resistor values, am i right about the colours blue/green/black of the two resistors in the blue circle ? and brown/green/brown of the one resistor in the red circle ? if it is so im right about the 112 vs 150 ohm ( you'll have to correct them, to the same size for both channels ).

You can use this tabel to check it out.

Image


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PostPosted: 22 Aug 2010, 09:17 
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Joined: 13 Aug 2010, 17:12
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In the blue circle, one 100ohms in serie with one 56ohms
The total is 152ohms (checked with the meter)


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PostPosted: 22 Aug 2010, 09:26 
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Joined: 31 Dec 2008, 15:34
Posts: 441
Mr2D wrote:
In the blue circle, one 100ohms in serie with one 56ohms
The total is 152ohms (checked with the meter)

Do you have skype ? maybe we could solve it there.

( use PM for the adress ).


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PostPosted: 22 Aug 2010, 16:11 
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Joined: 22 Jun 2010, 13:30
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I did it with a irf520 i got 300 watts of power it is my black rìg see a few pages bevore


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PostPosted: 24 Aug 2010, 12:44 
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Joined: 27 Jul 2010, 13:00
Posts: 3
Location: Italy
Hi
I'm a newbie in the forum and I came from italy ( sorry for my bad english :blush: ). This project impressed me so much and I deciced to bild it.
I bought all the components but I found only "buz72" instead of "irf510". The seller told me it works the same but I'm not sure :? . someone can tell me something about this mosfet?
thank you very much


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PostPosted: 26 Aug 2010, 12:42 
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Joined: 28 May 2008, 21:53
Posts: 4579
Location: Winnipeg, CANADA
Hi Zanky, welcome to the forum.

The following are listed as replacements / alternates for the IRF510: BUZ 20, BUZ 72, 2SK628, 2SK917, 2SK920

So you should be ok with the BUZ72. Let us know how you make out.
Cheers

_________________
[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


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PostPosted: 26 Aug 2010, 16:58 
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Joined: 27 Jul 2010, 13:00
Posts: 3
Location: Italy
Hi
I finished assembling the amp this morning. The sound is really nice: much "bass" and the "high" are very pure. Now I'm using a 12v 7Ah battery but I assembled the circuit for the AC power supply. I didn't use the lm317 circuit but a normal 7812 with a diode in series on the GND terminal. The output is 12,63 volt under load and I think it's ok. I don't heard any kind of noise.
a stupid question... for increase a little the gain of the amp ?
thank agains and sorry for my bad english.


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PostPosted: 01 Sep 2010, 10:00 
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Joined: 01 Sep 2010, 09:25
Posts: 5
Hi,I can not find out the volume pot 10k in my area, so can i use the 50k volume pot ?
any one help,i apprecieate that


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