Philips CDM4 Laser Head (3)

Philips 的CD系统构造合理、质量上乘，是目前世界各大音响厂商和电脑商采用率最高的一个系统。从编号来看，Philips 的CDM系统发展到现在共有12个型号，较早期的CDM-3、CDM-4和CDM-9在目前一些顶级机种中最为常见。在Philips的CDM系统中，从CDM-1到CDM-9都是用摇臂循迹的方式进行单光束读取信号。早期的Philips CDM-1、CDM-3结构相当科学，大名鼎鼎的Krell MD-2/10、Studer A730、Luxman D-500等Hi-End机就使用了它。CDM系统发展到CDM-4后，由于所有的线路都可作调整，兼容性好，结构得到进一步简化。CDM-4还有另一种使用铝铸底盘的称为"Pro"高级型的产品，世界上许多顶级的音响生产厂家纷纷将它用到自己的Hi-End机之中，一时间CDM-4似乎成了高档和靓声CD机的标志，它最成功的例子就是用在被誉为CD机王的Mark Levinson No .31中。在CDM-4之后，Philips又推出了另一个结构更为简洁、可以将可调线路固定化、同样也大受欢迎并被许多高档CD机所采用的CDM-9转盘系统，法国一代名品GOLDMUND Mimesis 36 PlusA就使用了CDM-9 Pro。

CDM-9的产量并不是很多，当Philips顶级CD机LHH-900R最后一台产品下线时，Psilips也宣称今后不再生产CDM-9系列产品。为了满足市场的需要，在1994年Philips又推出了一个全新的转盘系统CDM-12，该系统在目前的CD机中应用最广。

FH Wong

Infected! By h1f1 virus (5) Express lane-PCB/Kit

PCB/ Kit set

Many people fail to start diy mainly due to they did not take the first step. You don’t have to start like me. If I were to start again definitely I will start with PCB/KIT SET.

When buying a PCB/Kit set actually it offers numerous of advantages:

1) Actually we are buying others expertise

The person who make it is more experiance  than us.(We are still green at that time)

2) Proven

The product normally been tested and function properly.I talking product from reputable seller.
In Malaysia, i only know Yeo from http://www.diyparadise.com/

3) Morale boaster.

It very fast to complete a kit set. You will feel the pinch if you have invested a lot of resources and later found out it is a failure. This is demorale especially for beginner and might quit diy.

I have completed this line pre amp base on CONVERGENT AUDIO TECHNOLOGY. I would say this pre is a much complex(4 tube) design but i have finished it around an hours.The question i am more concern is it don't hummm...yeah!

4)Suitable for complex circuit.

Another power supply base on Matisse Reference pre also finished in less than an hour.(Sorry i have desolder some of the parts for other project

So don’t stop.Many people have stop after the kit/pcb is build up.

Learn from the PCB.Use back engineer approach. Learn how they design the layout and the connection. Many thing can be learn from there. From here you may proceed further to do point to point/scratch

However there are several things you must know. The performance/sound is much restricted by the pcb(Sorry guy I like point to point).Pcb is not meant to be solder and desolder for many times. So testing out components/parts may not be viable. Different components have different size and the pcb might not be able to fit the size.

Please avoid SMD type of kit unless it is been soldered.I still remember i encourage a buddy to buy Kit but later he show me a Kit with SMD.

All i can do is open wide my eye and look at him.You know who you are.Now i still laugh when i think of it.
But i think he learn how to pay through paypal.Hahaha!
Solder Smd type require smaller  tip for the solder gun and i still can't do it nowsaday.So don't ask me about this.

KLau

Hello!

Hi,

Old picture during house keeping last year!

Launch!

Today 10/10/2009  http://www.h1f1.blogspot.com/ is officially launched.So tell your friends, wife, or anyone.So now let cheers

KLau

Infected! By h1f1 virus (4) Now everyone can Diy

This "play hifi or being play by hifi period" have keep me happy for around 10 years.Naturally I moved back to east Malaysia where I meet a person that have completely change my direction in hi fi. Its Shamsul, I meet him in Kota kinabalu where I’m on work. He highly recommends me the “DARLING Amplifier”.

I still remember I  ask him this question before decided to build the darling amplifier. What amplifier did you posses, Shamsul say I still have a Rogers E-40 and a Jadis Orchestra that put in the closet.(At that time every magazine is uuhhh-ahhhh about this 2 amplifier) OK~! That’s the answer that I want. I'm determined to build a Darling amplifier but I’m zero in electronic.

Shamsul say if you can’t make it sing just take it here I will “kautim” (solve) for you. He also helps me to source all the parts. The only technical question I ever ask him is”How to count the tube socket leg number”.

I stare at the schematic 3 days (no kidding) even it is just a simple circuit.

After all the preparation Darling amplifier is sing when power up without any hum(Maybe I’m lucky ,it even sing with many cold joint) and i recheck 5 time before dare to power it up. This is the sweetest sound I have ever heard.

A multimeter and soldering is all you need to build a tube amplifier

KLau

work in process

'You win again' LP from Bee Gees.. oh yah.

Hai guys, this is my first post here. First of all congrates and thanks to Kenneth for taking the innitiative starting a new blog with a 'different concept' for exposing hifi friends' journey. I am Wan from Sarawak. Kind of a stubborn guy but finally complete something i'd longing for, the oh mighty Lenco tt source. Actually the process of building this Lenco based project took me long years. Total of 2 failure and only now shown in picture is successful.

How difficult is difficult to start vinyl? It can be very simple; replace your cd with a tt, that is all u need to do.

Cartrige is expensive and don't last forever- your valued Mullard or GEC is not for display too.

vinyl is expensive!! - your super recorded cd is not cheap too.

I don't have a phono!! - then don't spend too much on your dac!!!

tt is expensive!! - 2nd hand Rega P3 only less then 1.5k with great

cart, great deal, great sound. What cd can u buy at

that price?

Well, that is my opinion and how i start into tt. Cheers!!!