100W Ultimate Fidelity Amplifier

still4given · 2015-12-30 10:01 pm

apexaudio said:
Yes, there is no gain on tidu034 circuit, with gain this will be preamp.
Regards

Is the tidu034 an APEX design? For some reason I thought it was just posted as an example.

Anyway, I built the Inverting and Non-inverting models of the LinearPre based on my layouts. Both are working fine even though I used the 10k log pots. Is there a reason why using a linear pot works better in thiss design?

Thanks, Terry

apexaudio · 2015-12-30 10:26 pm

still4given said:
Is the tidu034 an APEX design? For some reason I thought it was just posted as an example.

Anyway, I built the Inverting and Non-inverting models of the LinearPre based on my layouts. Both are working fine even though I used the 10k log pots. Is there a reason why using a linear pot works better in thiss design?

Thanks, Terry

Nice work.
This circuit allows a standard-tolerance pot to be used with excellent results, and a dual linear pot can give good matching between channels of a stereo system.
Regards

bimo · 2015-12-31 12:29 am

still4given said:
Is there a reason why using a linear pot works better in thiss design?

Thanks, Terry

Please read this: ESP - A Better Volume Control

prasi · 2015-12-31 2:12 am

still4given said:
Is the tidu034 an APEX design? For some reason I thought it was just posted as an example.

Anyway, I built the Inverting and Non-inverting models of the LinearPre based on my layouts. Both are working fine even though I used the 10k log pots. Is there a reason why using a linear pot works better in thiss design?

Thanks, Terry

nicely done Terry. "Thimios" style soldering

. which PSU r u using to power-up the circuit? also is the same PSU used to supply both power amp and pre-amp (like apex PSU 10 with seperate 12V o/p and power amp o/p).
reg
prasi

still4given · 2015-12-31 2:32 am

I'm using a small board I built that sort of follows ESP's cap multiplier. I'm just powering it with a 12.6-0-12.6vac transformer.

rohin · 2015-12-31 4:56 am

prasi said:
Hi, Why do you say that software is not good? doesnt it make sch and layout compatible? I know it doesnt look good but, I am pretty happy with it (in other words, dont have the patience to learn new software).

you can learn sprint layout in less than one hour.you will forget everything when you make pcb in sprint . i like your habit to make pcb but i want you make awesome pcb from india .

prasi · 2015-12-31 6:58 am

Hi Terry,
Nice PSU PCB. Surely it would go well with any pre-amp.
Hi Rohin,
Thanks for you encouragement and kind words. I promise to make an effort to learn Sprint and bring out beautiful looking PCB's like Terry does here.
Regards
Prasi

andrewlebon · 2015-12-31 9:40 am

Extreme Modifications to the Musical fidelity X-DAC V3
this regulated power supply is better LM337 LM337

still4given · 2015-12-31 1:24 pm

andrewlebon said:
Extreme Modifications to the Musical fidelity X-DAC V3
this regulated power supply is better LM337 LM337

Why do you say that's better?

jwilhelm · 2015-12-31 1:45 pm

LM317/337 are slightly quieter than LM7815/7915. Both supplies will be very similar in use, and both are missing the protection diodes for the regulators. There's better examples on the datasheets for the regulators.

still4given · 2015-12-31 2:01 pm

I have built the ESP P05C Power Supply for Preamps which is similar to the Music Fidelity one linked above.I couldn't see any difference from the one I'm using now. I'll try to take a closer look.

jwilhelm · 2015-12-31 2:01 pm

I just went through a bunch of the latest datasheets for regulators. They aren't showing as many good examples any more. I think the old National datasheets showed more.

jwilhelm · 2015-12-31 2:07 pm

still4given said:
I have built the ESP P05C Power Supply for Preamps which is similar to the Music Fidelity one linked above.I couldn't see any difference from the one I'm using now. I'll try to take a closer look.

Notice D5 and D6 in that circuit. Those are the protection diodes I was talking about. If you connect your supply to a powered device (like charged caps), that voltage will dump backwards through your regulators into your supply. These diodes protect the regulators from this.

If you want a really quiet supply, check out Ostripper's Jung regulator design.

still4given · 2015-12-31 2:16 pm

I can add those diodes very easily. I will also add them to my Sprint layout. I also have a Sprint layout for the P05. I have been waiting on some caps to arrive so I can build more of those. I have 6 different preamps built recently that all need power supplies. It will be interesting to see if there is any noticeable difference between them,

andrewlebon · 2015-12-31 2:17 pm

Hi Terry
greetings this regulated supply was used in the silicon chip studio preamp which
i had made its more quieter than 7815 7915 regulated supply if you make it you
will find the difference
warm regards
Andrew

jwilhelm · 2015-12-31 2:18 pm

You'll likely only see a difference on a distortion analyzer. If the preamp design is good, it will reject most of the supply noise.

rohin · 2015-12-31 3:33 pm

supplies may be same and can work well but a class psu is best for preamp. you can hear difference clear if you have high quality amp and speaker.

bfg4wd · 2015-12-31 4:05 pm

??

rohin said:
supplies may be same and can work well but a class psu is best for preamp. you can hear difference clear if you have high quality amp and speaker.

Please explain, what is class psu?

Regards

apexaudio · 2015-12-31 4:29 pm

bfg4wd said:
Please explain, what is class psu?

Regards

http://www.diyaudio.com/forums/power-supplies/164365-class-preamp-psu-3.html

apexaudio · 2015-12-31 4:54 pm

Simple Preamp PSU

100W Ultimate Fidelity Amplifier

Member

Attachments

Member

Member

Member

Member

Attachments

Member

Member

R.I.P.

Member

Member

Member

Member

Member

Member

R.I.P.

Member

Member

Member

Member

Member

Attachments