[jasonhanjk]

Matrix reloaded not bad. The bad thing is the Malaysian government cut quite a few scence.

Awwww... Arghhhhh...

Nevermind, watch again in Singapore this time...

Sohai, have you tried anything like lead acid battery? I may going to try them a few weeks later.

 

[danlaix]

Hi Jason,

Matrix not bad??!! Its avesome dude. Waited 4 years for this, and i dun think it only deserve a not bad, right?
I dun think there is anything cut off from the movie, apart from the sex scene. The rest is all out. But the dvd will be out soon so dun have to worry.

Sorry for the matrix topic...just cant help it..

 

[[so]hai(R)]

hi... i haven't try lead battery yet... but i think it's too bulky and heavy to make any amp portable... y not try lithium ion? however, the charger is quite tough to design... it's on my waiting list though.....

too many projects.... too little time....

 

[yejun]

I am confused by DIR1703's PLL1 100Mhz clock, does that generated from external crystal?

 

[[so]hai(R)]

the ppl clock is generated by the internal circuitry... that's mean it's independent from external clock...

 

[yejun]

so i can use any speed external crystal?

 

[[so]hai(R)]

hmm.... actually i don't know... but i think u can... but then u r tied to ppl mode only.... i think u should try and let me know as well... anyway, u can always change the cystal if it don't work out...

 

[jasonhanjk]

Yup, bulky. I think i'll go for it as can hold lots of power. Adding the PPA design is so big, should able to make it.

Anyway, the clone PPA that I am building would be completed by today...

 

[[so]hai(R)]

wow...that was fast....Good luck in ur work and don't forget to tell us how it sounds...

 

[[so]hai(R)]

hi jason, can u measure the power consumption of the PPA? i would like to know so that i can decide which type of battery is suitable to use... Also, r u stacking that huge amount of buffers?????

That must be expensive...

 

[jasonhanjk]

Nope. One buffer for each channel. The spec for my Senn HD600 requires max 80mA and each buffer max output is 250mA, should be no problem. I need to test one channel first to make sure it work...

Cost S$8.51 per buffer from RS.

Give you the results tonight.

 

[jasonhanjk]

I like your new avartar!!!

Anyway, my clone PPA failed because I used 2 resistor at the power supply as virtual ground, having 1 volt changes after connect to a load.

Maybe some oscillation as the circuit is a close loop design. Will try again with a open loop design. Expect the sound goes cheap!

May not get the results today....

 

[[so]hai(R)]

haha...thanks... i like urs as well...

Also no worry, don't rush thing for me... i'm a patient man....

Happy building!

 

[guzzler]

the PPAs power draw with all those buffers is huge, so only rechargeable batteries, namely NiMH batteries do the trick!

g

 

[[so]hai(R)]

ic.. thanks guzzler.. but how about lithium battery?