有無師兄用LPS比Magic TV 代替火牛？

ktsang01

如題。小弟打算淘寶老虎魚25KVA LPS一試，有無師兄試過？或有無其他牌子介紹。

chkt1981

本地制作， 非常貴，用後一定不會除下, 信不信由你

wklie

Magic TV requires at least 12V 3A power supply.  For MTV7000D series and MTV8000D they require 12V 4A.

Your 25KVA (i.e. 12V 2A) is not sufficient.

GuyMocha

I have a second hand DHC LPS for sale, pls check the "For Sale" forum.

Thanks.

ltkeric

用緊 Kingrex PSU MK2 13V4A, 正

wklie

ltkeric 發表於 2015-8-5 23:42
用緊 Kingrex PSU MK2 13V4A, 正

I've read about this before:
http://www.feversound1.com/150306-kingrex-psuii/

I just wonder why it's 13V not 12V.

ltkeric

wklie 發表於 2015-8-6 11:01
I've read about this before:
http://www.feversound1.com/150306-kingrex-psuii/

以下是copy from 友台討論區的內容如下：


曽經有師兄send咗email去台灣Kingrex問一些關於13V及機熱的問題，kingrex回覆話 PSU MKII 熱係正常的，而且已用 Magic TV 測試咗九個月都沒有問題，以下是電郵內容如下：

Ask:
I live in Hong Kong. I am using the Kingrex PSU MKII (13V, 4A) for my TV box - Magic TV 7000S mini. But, the surface of Kingrex PSU becomes very hot after my TV box is switched on for a while. Is it normal? The original transformer of my TV box is 12V, 4.16A. Thanks.


Reply from Kingrex:
Dear Mark Mak

Thanks for your question. This is Christine of KingRex Tech.

About the 4A/13V PSU MKII, the heat of the front panel is high for sure. Because KingRex use the front panel as heat sink, the temperature might reach 70oC if the power keep continously outputing over 80% power demand or 100%.

Why would PSU MKII 4A in such high temperature we still treat it as normal? It's the linear power characterstic.

All of our 13V PSU MKII are 13V /4A. However, the Linear Power is in floating output. It's better to adapt the amplifier products.

Due to the power demand of the amplifier product will float by the dynamic (While dynamic demand is strong, the instant DC demand will go up.  While dynamic demand is weak, the instant DC demand will go down.) The power demand will go up & down - we call it floating.

Due to the working mode is quite different to linear power & switching power. The switching power normally can 100% output continously. However, the linear power only output 25% output continouly & 100% output in sudden demand.  Magic TV needs continously output.

But the temperature is acceptable, it won't cause any damage or short for the PSU MKII itself.

Please just leave the PSU MKII in good air cycle area and do not place it in any place at thick cloth or warm area.


Ask:
Dear Christine,

Thanks for reply.

That means,

1. This is both OK for the Kingrex PSU and Magic TV, even my Magic TV is 12V, not 13V.

2. No hazard to the life of Kingrex if operating in high temperature for a long period.

Am I right?

Regards,
Mark


Reply from Kingrex:
Dear Mark

Yes, you are right.

We arleady test Magic TV for over 9months w/ new PSU MKII 4A. They are both all fine.

1. higher voltage in 13V is acceptable due to all electronic parts will all have their own tolerance. It will only help the Magic TV can have better performance.
    The sound will be more powerful.

2. Yes, inside the PSU MKII there are two fuses inside. It will auto protect the backward machine and itself for broken the fuse by sudden high power output.

best regards,

Christine Wu
KingRex Technology Co., LTD


希望以上能給你答案   但我用了成年都無問題

digiman

thanks for sharing, very useful to all magic tv users

the_1

ltkeric 發表於 2015-8-5 23:42
用緊 Kingrex PSU MK2 13V4A, 正

我都用緊, 音響好OK

pan

用過台灣KECES 12V6A俾 7000D用