Altec Lansing ATP3 Modify

Yesterday, I open up my Altec Lansing ATP3 again to capture what I have done for my ATP3. In this post, I will share out how I modified my Altec Lansing ATP3. Actually the modification I done last year and now only posted it. Reason being, that time I don't have camera to snap on it.

*REMINDER...MODIFY AT YOUR OWN RISK...

To open the circuit board, you have to remove the screw on bottom of the woofer (picture above). The board is stick on the plastic. Be cafeful when open it up.

This is my DIY cable to replace the stock cable. The material that I get from Jalan Pasar . I bought 2m of Canare cable(L-2T2S) and 2 of Canare 3.5mm jack(F-12).

This is what you can see after open out from the woofer. It sticked on the plastic.Be careful when remove the plastic from the woofer. There are some wires connected.

I changed the output capacitor with Rubycon ZL series.(16V 470uF). I noticed that there is different, the sound is clearer that before, more background sound.

There is one big capacitor which I replaced with BC Component capacitor of the same value &voltage. 25V 10000uF. This capacitor is used for smoothing out the DC after the reactifier circuit. The characteristic of the capacitor is low ESR value and high rippler current. The reason why I changing this is because a clean DC able to produce with clearer sound.

In my ATP3, it initially has 3 Dual Op-amp(ST4885). It was replaced with LM4562. Originally the ST4885 is soldered through the board. You have to de-solder it and adds in the IC socket(8 pins) so that in future if you want replace to the op-amp, you may easily plug and plug.

Besides the op amp, I also changed the capacitors which near the op-amp with Panasonic ECA series.(same value &voltage).

There is another op-amp located near to the power amplifier IC.(TDA7377).


This is the last op-amp you can see from the picture. It also has been replaced with LM4562.

You also see one Quad op-amp(14 pins), I am not sure the exact function of the Quad op-amp, but just replace with LME49740.

In the woofer box, some sponge was inserted to reduce some reflection wave from the wall of speaker.

For woofer speaker, I add on one hand-made coil and one capacitor. The bass become more "solid" and strong.

Finally, the modification is done. I test it....WOW....the sound is impresive....is clearer, separated..warmer....the bass more solid...

*REMINDER...MODIFY AT YOUR OWN RISK...

Added in photo with marking in red box.

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Morning Shoot...Wonderful Day

Wake up early early morning...looked at outside...wow..the sun rise ...I just simply took one picture.....wonderful day...

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Inside Sonic Gear A6

I opened the Sonic Gear last weekend. In this post you can see what exactly inside in the speaker. We can see the vacuum tube(6N3-T), big capacitors, IC, transformer and some others components.

How to open it?

1st of all, you need to remove all the screw, front and the back. Beofre that, you have to remove the black "mask", then you only can see the screw. After removed the screw, you will see 2 big capacitors 450V 100uF and one vacuum tube.

Next step, you have to remove the screw at the back. Once open it, you can see the 2 capacitor which are 35v 4700uF.

What can modify?

Capacitor

Maybe you can replace those capacitor with higher spec of capacitor. Higher spec does not means higher value. It can be low ESR, higher ripple current, long life, higher temperature, and so on.

Vacuum Tube

I am still new in tube world. I have to do survey on the replacement of 6N3-T. Based on forum, 5670 tube can be used as replacement of 6N3-T. But haven't find out the price of the tube. Hopelly it is not too expensive.

If someone expert in tube, is welcome to sharing your experiences.

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DIY Speaker Cable For Sonic Gear A6

8 JUNE 2009, I went to eat roti canai again at Penang Argyll Road Roti Canai, I saw a component shop over there. After makan, then I entered to the shop to look for the cable and RCA connector as I wanted to DIY the speaker cable. Finally I get a pair of Nakamichi RCA connector with 2 meter of Maruni Professional cable.

After assembled it, I tested with my speaker and noticed the sound is different from the stock cable, more clearer. Total I spend the cost is RM19 (connector=RM11 & 2m cable= RM8)

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Nikon D90---Digital Field Guide

I realize that this book is very useful to me as beginner of SLR user. This book explained in detail of how to utilise the function of the camera. One thing I learned from this book is Metering Modes. There are 3 types of metering modes - 3D Color Matrix Metering II, Center-Weighted Metering and Spot Metering. I had tested with my camera with diffent mode, you may see the picture below based on the mode respectively.

3D Color Matrix Metering II - reads the brightness and contrast through entire frame to determine the best metering pattern to be used for exposure calculation.

Center-Weighted Metering - A light measuring that emphasizes the area in the middle of the frame.

Spot Metering - a metering system in which the exposure is based on a small area of the picture.

3D Color Matrix Metering II

Center-Weighted Metering

Spot Metering

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The Loaf Pavilion Kuala Lumpur

After the Shennen wedding, the next day we took bus from Temerloh to KL. We reached KL Pekeliling bus station was about 9.30am. We decided to go Pavillion jalan jalan since our bus ticket from KL to Penang was 2.30pm. At Pavillion, I bought Digital Camera magazine(issued monthly) and Nikon D90-Digital Field Guide book at Times bookshop. Time is near to 12pm, we taken our lunch at The Loaf...the food is nice..Yummy!!!

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Shennen&Yet Wedding 6 MAY 2009

Last weekend, I attended Shennen's wedding. This was my 1st time shooting wedding picture using my D90. Thanks to Shennen for inviting me giving me an opportunity to take wedding photo. Actually I personally feel that to capture portrait(人像), it do required some skills. As I am begineer, I need more practice...hopefully I can shoot like Pro...

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