Author Topic: DNY40W Power Amplifier (P3A2) - Filipino Design Amplifier (Read 20814 times)

F. Dandy · « **on:** Dec 20, 2015 at 06:49 AM »

Hello guys -- I want to share this Amplifier project we had with my Filipino friends around the world.

Well, its another amplifier, you may say --- and may not be appreciable to the high end amplifier, but........... maybe it can! It has build into several hundreds stereo and that is awesome with positive feedback, besides it was initially intended for LEARNING the art and design of power amplifier for our younger brethren in the electronics and for people who love to diy and happy of creating good stuff from their finger tips.

More information in the User Manual we prepared, which is also shareware, download it here :
- description of the project
- basic audio setup
- analog and digital
- block diagram /explanation
- circuit diagram
- picture gallery

https://www.dropbox.com/s/o4926dwzpwaqr4a/Issue28_DNY40W_Unreleased%20Tech%20Info.pdf?dl=0

I hope you will like it, and looking forward to compare its sound signature with your high end amplifiers, I or we don't have those high-end amplifier in our hand.

More info:
DNY40W --- the amplfier is capable of delivering 40Watt average power into 8 ohms (sometimes called
the RMS power), that is 80Watts stereo
DNY is the accronym of the guy who designed the hardware (Danny)
P3A2 ------ stands for Pure Analog Processing Power Amplifier
we may have tired of class D / T amp, so, we go back to the pure analog
processing which is more fun with a lot of tweak we can do

we pretty know its DIY --- but look at the finished protoype with matching tone control (another tone control designed by Filipino)

Bottom = DNY40W Stereo Power Amplifier
Top = diy funded project Tone Control (Bass, Mid, Treble + Volume)

tony · « **Reply #1 on:** Dec 20, 2015 at 08:03 AM »

nice one Dandy, welcome to the board....

qguy · « **Reply #2 on:** Dec 21, 2015 at 09:25 AM »

How much would the set pre and power amp cost ?
Have you compared it to any commercially available amp ?

BTW... I love the Mid tone controls

tony · « **Reply #3 on:** Dec 22, 2015 at 12:45 PM »

Dandy works in china, and considering that the chinese government tries to suppress free internet access there, he may not be able to pop in here as often as he would like to...

you can pm him for his email address or other means to reach him if you need something from him...
i have his email address but until he gives me the go ahead, i can not release that info...

Like myself, Dandy is more diy'er friendly, getting out of his way to help students and other young upstarts...

rochie is in constant contact with Dandy...

CoolTOYZPH · « **Reply #4 on:** Dec 22, 2015 at 12:53 PM »

Very Good Aesthetics. Hope there will be a local showroom where we can experience the sound.

rochie · « **Reply #5 on:** Dec 22, 2015 at 01:27 PM »

Quote from: CoolTOYZPH on Dec 22, 2015 at 12:53 PM

Very Good Aesthetics. Hope there will be a local showroom where we can experience the sound.

after I finished mine will let you borrow it

, super busy pa kasi kaya di ko pa matapos tapos hahaha, testing na lang and adjustment of bias,already soldered the components in the PCB.

we've got a lot of projects in the pipeline coming in for the DIY community especially for the newbies and students who's in tight budget. honestly the only thing that is hindering us to release a pre-built amp is the fabrication of casing locally.

maybe next year we can release the 150watts/ch amp kit design be our fellow pinoy based overseas.

rochie · « **Reply #6 on:** Dec 22, 2015 at 01:46 PM »

Quote from: qguy on Dec 21, 2015 at 09:25 AM

How much would the set pre and power amp cost ?
Have you compared it to any commercially available amp ?

BTW... I love the Mid tone controls

Bro the pre-amp is still under pcb fab but the power amp is available locally in kit form(pcb + components), i know your handy with the soldering iron so you can easily assemble one hehehehehe, assembly and testing is fully documented. PM me if your interested, I promise you it wont break your bank account hehehehe

a little bit of trivia regarding this amplifier.
- one of the designer of this amp is 1 of the only 4 authorized/licensed Mark Levinson technician in the U.S.

tony · « **Reply #7 on:** Dec 22, 2015 at 07:23 PM »

Quote from: rochie on Dec 22, 2015 at 01:46 PM

Bro the pre-amp is still under pcb fab but the power amp is available locally in kit form(pcb + components), i know your handy with the soldering iron so you can easily assemble one hehehehehe, assembly and testing is fully documented. PM me if your interested, I promise you it wont break your bank account hehehehe

a little bit of trivia regarding this amplifier.
- one of the designer of this amp is 1 of the only 4 authorized/licensed Mark Levinson technician in the U.S.

name is Danny Eulogio and is based in washington state.....he designed this DNY40W power amp....

Abad Santos 7 · « **Reply #8 on:** Dec 23, 2015 at 12:23 PM »

Quote from: rochie on Dec 22, 2015 at 01:27 PM

maybe next year we can release the 150watts/ch amp kit design be our fellow pinoy based overseas.

This is an interesting project to wait if not Class A....

rochie · « **Reply #9 on:** Dec 23, 2015 at 01:06 PM »

Quote from: Abad Santos 7 on Dec 23, 2015 at 12:23 PM

This is an interesting project to wait if not Class A....

most probably class a/b. prototype design is already in testing phase. we will follow the design principle applied to dny40w pcb w/c is flexible enough that you can try different configurations in the input stage w/ jumpers.

innocent · « **Reply #10 on:** Dec 23, 2015 at 01:31 PM »

Nice! Sana may class A 25watter power Amp or preferably Integrated Amp with phono using only film caps in all audio signals. Nichicon KG in power caps.

Thanks for sharing.

tony · « **Reply #11 on:** Dec 23, 2015 at 04:23 PM »

Quote from: rochie on Dec 23, 2015 at 01:06 PM

most probably class a/b. prototype design is already in testing phase. we will follow the design principle applied to dny40w pcb w/c is flexible enough that you can try different configurations in the input stage w/ jumpers.

these are all class AB designs, but can be run class A if desired, psu and heatsinking will differ....

Abad Santos 7 · « **Reply #12 on:** Dec 23, 2015 at 05:02 PM »

Sir Tony, Sir Rochie,

Thanks. A/B for me will be perfect.

I have already completed several Class A project and AB will be a different flavor to try.

Cheers.

tony · « **Reply #13 on:** Dec 23, 2015 at 05:52 PM »

Quote from: Abad Santos 7 on Dec 23, 2015 at 05:02 PM

Sir Tony, Sir Rochie,

Thanks. A/B for me will be perfect.

I have already completed several Class A project and AB will be a different flavor to try.

Cheers.

you can order kits from Rochie, i have two kits waiting to be built,
i think that there are still some kits available from Rochie, pm him in case you want to build one...
i suggest that you build the version 4 one with current mirrors as input ltp active loads...

Abad Santos 7 · « **Reply #14 on:** Dec 23, 2015 at 06:27 PM »

Sir Tony,

Got it.

Sir Rochie,

PM sent.

Cheers.

loi

tony · « **Reply #15 on:** Dec 23, 2015 at 06:31 PM »

you can buy the 24-0-24 traffo from deeco to use in this amp,
or you can get one from Edrel Sison, he has some stock of 31-0-31 traffos that can also be used.....

this is the redline schematics i used in my second build...

this build used the rubycon blakgate filter caps, 22kufd/63v in the psu....

F. Dandy · « **Reply #16 on:** Dec 24, 2015 at 03:32 PM »

Quote from: tony on Dec 22, 2015 at 12:45 PM

Dandy works in china, and considering that the chinese government tries to suppress free internet access there, he may not be able to pop in here as often as he would like to...

you can pm him for his email address or other means to reach him if you need something from him...
i have his email address but until he gives me the go ahead, i can not release that info...

Like myself, Dandy is more diy'er friendly, getting out of his way to help students and other young upstarts...

rochie is in constant contact with Dandy...

thanks Sir Tony

You may contact me on the following :
1. wechat : diycenter <fast and easy, as I always handle my phone with good 4G coverage>
2. [email protected]
3. --> via Rochie

Quote from: tony on Dec 22, 2015 at 12:45 PM

Like myself, Dandy is more diy'er friendly, getting out of his way to help students and other young upstarts...

also....

willing to cooperate to a more interesting project, an adventure in the DIY world and customization - freedom of choice of hardware and solution, like this baby (a customized Class D amplifier, with digital controls, didital power Supply <SMPS>< and freedom of display to any message you like to convey)

Anyone can make his dream home audio systems into reality --------------> just you need to know your buddy who can help you (i have my Chinese buddies)

F. Dandy · « **Reply #17 on:** Dec 24, 2015 at 03:46 PM »

Quote from: tony on Dec 23, 2015 at 06:31 PM

this is the redline schematics i used in my second build...

Thanks sir Tony for publishing your modification and improvements, that is another leverage or should I say KPI, you can do what you prefer, not just simply dictated by manufacturer in case of commercial amp.

I think that, there are 2 ways we go with this amp, by being a

1. Result oriented
2. Process oriented

I go with #2, dahil iyan nagbibigay ng ligaya sa akin, alam ko nga ins and out ng amplifier ko, that makes me proud to discuss with my friends, i know the biasing and I know how signal are process, and I know how it sounds, its the sum total characteristic of the amplifier

I love to be result oriented as well, the only problem is that, I do not have the speaker to match the DNY40W amplifier (total acoustic performance), I am quiet busy really in real job, not even touch those Mark Audio speakers I got

tony · « **Reply #18 on:** Dec 24, 2015 at 04:38 PM »

any speaker with a 90db sensitivity will mate well with this amp...

Dandy, merry christmas, please do not think i am ignoring you not answering your emails....
it is just that i also have my own personal issues....you know....

i hope you can meet with Ric Del Rosario, he used to work with Panasonic in taytay before and has actual experience in production and testing audio equipment....

F. Dandy · « **Reply #19 on:** Dec 25, 2015 at 10:23 AM »

Maligaya'ng pasko sa inyong lahat

Let's power up our diy AMP this Christmas

Abad Santos 7 · « **Reply #20 on:** Dec 25, 2015 at 04:38 PM »

Mamaya Sir pedeng Heater

Merry Xmas po...

tony · « **Reply #21 on:** Dec 25, 2015 at 04:43 PM »

Dandy, if you happen to have some free kits, please give them to Abad Santos 7....

Abad Santos 7 · « **Reply #22 on:** Dec 26, 2015 at 01:20 PM »

Quote from: tony on Dec 25, 2015 at 04:43 PM

Dandy, if you happen to have some free kits, please give them to Abad Santos 7....

Lancito · « **Reply #23 on:** Dec 26, 2015 at 01:35 PM »

Sana meron din 5 channel power ss amp na DIY. Might even be better than commercially branded amplifiers.

tony · « **Reply #24 on:** Dec 26, 2015 at 04:47 PM »

^Dandy gave me a marantz clone kit for free, i gave it away to another young diy'er to build, and the guy built it...je was happy.....

the filipino diy community is a close knit one....we help each other out...

no cash transactions are common place.....

Abad Santos 7 · « **Reply #25 on:** Dec 28, 2015 at 03:17 PM »

For a start, what is the ideal rail voltage for the 150W/CH?

VA Capacity?

I still have some 63KuF/63V capacitor, will it be OK? Do I still need to have a softstart?

Is this design sensitive to power supply ripple?

Cheers.

tony · « **Reply #26 on:** Dec 28, 2015 at 04:25 PM »

^depends on whether you are doing FTC power testing.....
in which case transformer needs to be bigger,
but if only for listening to music, you can get away with smaller traffos...
this is one advantage that classB/AB amps have over classA amps...

Abad Santos 7 · « **Reply #27 on:** Dec 28, 2015 at 04:50 PM »

Sir Tony thanks.

How about for the optimum rail voltage if I use my existing Capacitor @ 63V.

Im not familiar with AB how much voltage swing I need to achieve 150W. Does it uses
same calculation as with A?

Cheers.

tony · « **Reply #28 on:** Dec 28, 2015 at 05:02 PM »

Quote from: Abad Santos 7 on Dec 28, 2015 at 04:50 PM

Sir Tony thanks.

How about for the optimum rail voltage if I use my existing Capacitor @ 63V.

Im not familiar with AB how much voltage swing I need to achieve 150W. Does it uses
same calculation as with A?

Cheers.

traffos for class A will always be bigger and heavier than that for class AB,
reason being, with classA power delivery is constant, big current is always flowing....
class ab otoh idles at a much lower power than what it can deliver in terms of power output....

up to about 55 volts unloaded and depending on the size of your traffo,
bigger or heavier traffo will need to have lower, say 50 volts...
my rule of thumb for capacitors, about 80% of rated cap dc voltage....

many years ago, i asked the same question to Bob Cordell about the traffo size,
he replied, "get the biggest transformer that will fit in your box..."

F. Dandy · « **Reply #29 on:** Dec 29, 2015 at 04:13 PM »

Quote from: tony on Dec 24, 2015 at 04:38 PM

any speaker with a 90db sensitivity will mate well with this amp...

This is a nice info Sir Tony, I knew you build several already

There is this thread here in pinoy dvd as
http://www.pinoydvd.com/index.php/topic,201906.60.html

and I replied on #61 about system test based on acoustic (not electrical signal), trying to cooperate with other guys to have a performance test

Quote from: tony on Dec 25, 2015 at 04:43 PM

Dandy, if you happen to have some free kits, please give them to Abad Santos 7....

I had a small chat with Abad Santos 7 over wechat ---- guess now why wechat? hmmmm, I guess he have more kits than me, high end kits.

His place is where many diyers, not simply diyers, but diyers with a mind of selling diy stuff to the world.

Quote from: Abad Santos 7 on Dec 28, 2015 at 03:17 PM

For a start, what is the ideal rail voltage for the 150W/CH?

VA Capacity?

I still have some 63KuF/63V capacitor, will it be OK? Do I still need to have a softstart?

Is this design sensitive to power supply ripple?

Cheers.

Wow! At this target power 150W/channel -----> I assumed this is average power into 8 ohms speaker (sometimes many called Wrms), this project needs almost 85% overhaul, I am not suggesting it.

There is another filipino design power amp (which is also my school project), called Laguisma Series Amp from Baguio City, BJT and MOSFET output stage which were designed for high power at 8 ohms load.

And........... Mr. Tony have design idea of real high power output using lower impedance speaker load.

This project DNY40W is more of an average power needed in average house, room or office environment, the 40W/channel or 80W stereo -----> a personal listening power more than enough to fill your living room -- of course, when the input sensitivity is met.

The designer consider the idea, that, in home environment (average house size), the amplifier power suggested is about 20Wrms/channel or 40W stereo, at this power it should bring the music into a concert level (assuming the amplifier is driven correctly paired with good speakers --- not a speaker that easily taxed when increased the volume, or an speaker that changed the natural sound when increase the volume).

Where you used 100W/channel (200W stereo) in a home environment is like using a 10 wheeler truck to carry a piece of furniture, But, if that's what we need, go for it -- choose our Filipino designed amplifier, its fun and adventure to build them.

To answer some :
** the 63,000uF is over killed for this project, 10,000uF each on the split supply is good enough. But of course, if you feel happy to use it, welcome ---- many diyers make what is called "capacitor bank", it is true that the higher the capacitance on the PSU, the better, and they prefer to stock caps in a bank a high as 80,000uF or even 100,000 uF.

** at rated supply voltage of +/-30Vdc and with 10,000uF on the PSU it should not need softstart. Some guys also used +/-50Vdc with component changed in the circuit without softstart.

What is needed and highly recommended to add to this project is the Speaker Protector.