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Old 20th March 2012, 11:31 AM   #521
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OK sir
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Old 24th April 2012, 05:02 AM   #522
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Quote:
Originally Posted by apexaudio View Post
Simple Full Complementary Simetry +/-80V. Voltage amplifier/driver biased with 30mA. This driver circuit stabilized BIAS in output stage. Exelent stability without oscilation, hum and noise, sound great.
RMS Power: 240W 8ohm, 350W 4ohm
Hi, do you actually make this pcb's?
And if so, would you sale them?
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Old 24th April 2012, 10:58 AM   #523
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Hi,
I have few questions about this design:
If I want more or less power i just need to add or remove amplification degree(i'm not sure how it is really named in English.. ) of mosfets?
How can I calculate needed power supply voltage for this amplifier if I remove or add another pair of mosfets?
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Old 24th April 2012, 04:34 PM   #524
AndrewT is offline AndrewT  Scotland
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Hari,
simply asking the question tells me you are not ready to modify an amplifier design.
Leave it alone until you have learned how to determine what needs modifying.
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regards Andrew T.
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Old 24th April 2012, 05:34 PM   #525
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Mhm, i'm not ready, so that is why i'm asking
I have allways been taking hardest way to learn...
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Old 24th April 2012, 08:09 PM   #526
44250 is offline 44250  Serbia
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Default HV23

This is what i have done up till now...
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File Type: jpg DSC01518.JPG (441.4 KB, 656 views)
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Old 24th April 2012, 08:13 PM   #527
44250 is offline 44250  Serbia
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Default HV23 will be...

It is going to be something like this:
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File Type: jpg Slika269.jpg (556.0 KB, 188 views)
File Type: jpg Slika268.jpg (636.6 KB, 180 views)
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Old 24th April 2012, 08:35 PM   #528
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Quote:
Originally Posted by 44250 View Post
It is going to be something like this:
Nice work, that will be valuable amplifier, thanks for shareing.
Regards
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Old 24th April 2012, 11:02 PM   #529
44250 is offline 44250  Serbia
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Arrow some more pictures...

Quote:
Originally Posted by apexaudio View Post
Nice work, that will be valuable amplifier, thanks for shareing.
Regards
Heh,THANK YOU for sharing all this with us!

One thing must be considered,and that is if anyone uses *2N5401/5501 MJE340/350* than must be careful with pin-placements because the pcb was made for *2SA-2SC* combination with BC639/640. BC327-337 that replaces BC639-640 also has a different pin-placement,so be aware...

Some pictures from tonight:
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Old 25th April 2012, 04:37 AM   #530
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Thumbs up Power Amplifier

Quote:
Originally Posted by apexaudio View Post
Circuit diagram work good even in PA amplifiers. I made over 120 PCBs in last 5 years. Beginer with basic expirience in DIY can easy made this amp. Usefull not only for hobby.
So, do you have this for sale? fully populated or bare pcb's?
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