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100W Ultimate Fidelity Amplifier
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Old 28th November 2010, 04:37 PM   #401
AndrewT is offline AndrewT  Scotland
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Hi,
you only need one output ground link. This PSU Zero Volts is NOT the Main Audio Ground.
Take a lead from PSU Zero Volts to your Main Audio Ground.
Take all other references to the Main Audio Ground.
Do not take all the amps voltage references to the PSU !!!!!!
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regards Andrew T.
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Old 28th November 2010, 06:16 PM   #402
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by jef9200 View Post
One inconvenient of the board : there is only one output GND. I'll have to use a connector or make 2 new holes in the GND trace. An Idée ?
The pictures
Nice work, if you want star ground on psu pcb make new holes, thank you for clear pictures.
Regards
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Old 28th November 2010, 07:31 PM   #403
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by jef9200 View Post
Regulated supply build ! Works fine, very usefull for trying amps because it is possible to change the output voltage. 2X30V AC tranfo, 45DC ; i've try output from 30DC to 42 DC. Only 2X10000uf on the psu board. Zener= 8,2V.
Thanks Apex.
You don't need 10000uF/100V, with 2x30V AC use 10000uF/50V or 63V.
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Old 29th November 2010, 03:39 AM   #404
jerry999 is offline jerry999  Canada
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Default GREAT AMP

Quote:
Originally Posted by apexaudio View Post
I made this amplifier for test my home DIY speakers (two way TL).
ORIGINAL SCHEMATIC (almost the same) has been used in legendary UK HH amplifiers played by Rollingstones back in 70's
I got an original board please take a look, it is a beauty...Click the image to open in full size.
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Old 29th November 2010, 03:53 AM   #405
Boss_Ronald is offline Boss_Ronald  Philippines
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Default Question on Power Supply

Hi,

I have home made power supply for my amplifier.
It was manually turn by my self.

The secondary output were 60 0 63 volts ac.
After rectified output voltage becomes 84.6 0 84.6 volts dc.

Is this ok since secondary ac is not equal but after it was rectified it become equal voltages on the DC.

Need expert advice here.

regards.
Ronald
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Old 29th November 2010, 09:38 AM   #406
apexaudio is offline apexaudio  Serbia
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[QUOTE=jerry999;2380568]ORIGINAL SCHEMATIC (almost the same) has been used in legendary UK HH amplifiers played by Rollingstones back in 70's
I got an original board please take a look, it is a beauty...

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Old 29th November 2010, 09:45 AM   #407
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by Boss_Ronald View Post
Hi,

I have home made power supply for my amplifier.
It was manually turn by my self.

The secondary output were 60 0 63 volts ac.
After rectified output voltage becomes 84.6 0 84.6 volts dc.

Is this ok since secondary ac is not equal but after it was rectified it become equal voltages on the DC.

Need expert advice here.

regards.
Ronald
Yes you get equal DC voltages (higer) on caps after rectified, you can disconnect 60 volts ac and with single 63 volts you still have +/-84.6 volts dc.
Regards
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Old 29th November 2010, 10:44 PM   #408
Boss_Ronald is offline Boss_Ronald  Philippines
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Hi Apex,

So can I used my transfo with 60 0 63 ac with bridge diode to have strong current to my amplifier? Output DC becomes +-84.6 volts.

I just concern on the un balance ac voltage on the secondary winding.
Anyway is this safe?

Best regards,
Ronald
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Old 29th November 2010, 11:31 PM   #409
jerry999 is offline jerry999  Canada
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Default power supply for HH amp output stage

You have to make sure to have 60 0 60 otherwise you will have unstability. If you mak amp using this schematic (I will post it later) +-84 V DC is fine if output transistors have VCO 120+ (use 2N3773 or better Japanese audio transistors)



Quote:
Originally Posted by Boss_Ronald View Post
Hi,

I have home made power supply for my amplifier.
It was manually turn by my self.

The secondary output were 60 0 63 volts ac.
After rectified output voltage becomes 84.6 0 84.6 volts dc.

Is this ok since secondary ac is not equal but after it was rectified it become equal voltages on the DC.

Need expert advice here.

regards.
Ronald
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Old 30th November 2010, 07:26 AM   #410
apexaudio is offline apexaudio  Serbia
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Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by Boss_Ronald View Post
Hi Apex,

So can I used my transfo with 60 0 63 ac with bridge diode to have strong current to my amplifier? Output DC becomes +-84.6 volts.

I just concern on the un balance ac voltage on the secondary winding.
Anyway is this safe?

Best regards,
Ronald
Yes you can use it. Voltage is to high for this amp, what is your amp, do you considering to use Regulated PSU?
Regards
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