This is what you going to miss!!!

[jasonhanjk 0]

Here are some sneak preview of my CLONE PPA...

 

 

I just do a Rightmark test on my CLONE PPA and here is the result:

 

Frequency response (from 40 Hz to 15 kHz), dB: +0.00, -0.00

Noise level, dB (A): -94.5

Dynamic range, dB (A): 92.1

THD, %: 0.0033

IMD, %: 0.043

Stereo crosstalk, dB: -94.9

 

I am using my HD600 for loading. Still lose to the original PPA a bit: http://www.tangentsoft.net/audio/ppa/bench...-1x-buffers.htm

 

 

If you want to have a test on this amplifier, do come down to PIPEE's home!!!

[ablaze 0]

moving this to the main forum. (DIY goes there)

 

btw, that looks good jason. how's it different from an actual PPA btw?

[jasonhanjk 0]

Scared me. I thought delete liao.

 

Sound wise cannot ask newbie. I let you all have a try!!!

 

 

The internal parts consists of: {PPA original config with curly bracket}

Power from 4 AA batteries total 4.8V or PC internal 5V or 9V battery {PPA uses 18 AAA batteries}

DC-DC converter (output +12V, -12V & 0V) {don't have this from the original design}

3 capacitor {more than 10}

No volume adjust at the CLONE

OPA134PA {AD8610}

3 buffer {12 buffer}

Add big heatsink {no heatsink}

 

These are the majour ones, something like an expensive Cmoy.

[Sipher 0]

Cool

[N@Z 0]

Is the reason you called it a clone PPA due to using the circuit layout?

[Rameish 0]

How does that make it a clone PPA - however if it sounds good way to go!

[jasonhanjk 0]

I cannot call it a PPA since PPA is actually a PCB. I use the term clone as I uses it's schemactic...

[N@Z 0]

What we all want to know now is can you build one as soon as the details become firm!

[jasonhanjk 0]

At least one month with 100% built to spec. No promise though as some parts are very hard to find in Singapore.

 

AD8610 is the hardest of all...

[N@Z 0]

Sadly also, there is the small matter of cost...

[jasonhanjk 0]

~Cheap no good, good no cheap~

Confucius

 

For something better of course will be more expensive. Anyway my spec had already beaten the meta42 on results. If you like it I can build another CLONE at a cheaper price of course, casing not included

Edited June 18, 2003 by jasonhanjk

[fishball79 0]

Jason,

 

If many wants the yr amp im sure they are willing to pay for your efforts. This also allows you to scour online for parts u need. Shipping cost wouldn't be much if ur talking about a dozen opamps... they'd probably send them in a tube in an envelope...

[jasonhanjk 0]

Lol... If more than 5 people want at a time can be very cheap. Let's see how this Saturday and talk the possibilities.

 

Is there any other senior DYIers around here?