Diy 到底!....Pre-amp. & Amplifier 線性性能要求 ...的依據.

先看下文...




Jensen G610C Imperial喇叭...它的效率有103dB.
上述10年摩機的故事, 告訴我們...高效率喇叭給她甚麼....她就轟甚麼出來!
Amplifier 功率線性 THD 好的 ......音樂細節解析能力極佳. 
Amplifier 各級功率線性更佳的 ......音樂細節解析能力佳 ...之外....音場前後比例就優 ....自然....不突兀.
且 Pre-Amplifier & Amplifier 的 milti-tone THD 比相位相移對聲音的影響還大.
試想低頻如 Amplifier 的 THD 差, 那低頻單體音圈在用不完全波型driving 紙盆 造成聲音突兀 .
其實是失真, 讓音圈 蠢動, 進而調前後聽感.低頻沉不下去會糊-矇, 低頻聲音聽感就前傾.
試想交響越大鼓跑前面來打會怎樣.
如不失真如, 原錄訊號, 理想放大狀態下,聲音會歸位吧.

diy 到底在... 聲音會歸位... 也一直是課題.

WE212 coming back!

珠海丽磁....搭棚 mass production首件目檢....照片比對!




WE41 pre-amplifier +we212 amplifier 整機複刻!




傳說中絕跡的 we212複刻!




自製we212測試機... 大小分別是we212, vt4-c 211 or 845, 300b!

We212 plate-voltage 1500V

Grid Tied Inverter

Grid Tied Inverter.
DC input peak voltage 60V.
DC Max. input current 10A.
Aux. 12V battery connect-able.
AC output 110V/60hz.
AC output max. power 650W.
Anti-island.



Under test in LAB.
Grid Tied already.





Ultimate goal...All in One..
Kilo watt meter inside.

Grid tied output and Aux.DC output programmable.

Toy12 Plasma tweeter 離子高音 Diy-12 change new flame needle

Before change the flame needle always cause noise.
This is first time to change new needle.


Too busy so have half year no clean flame needle.


Below one is new.


Finish change flame needle.


This is more worse flame needle of Another channel .


After long time high temperature and a little bending the flame needle crack away.


Siemens PL519 almost run out left time so I change cathode bias to drive more plasma flame.

Because Siemens PL519 tube is hard  to find .

Plasma tweeter 離子高音 light on LED by Plasma flame

Detect plasma flame circuit.
Detect board got a long tail pick wire.



Light LED in darkness.
No need another power connect
So far no direct contact and with 3 cm distance

My wife coffee shop's amplifier

This Pioneer amplifier working over 15 years.
Fix two times already and always one channel broken.



 
So I buy a tube amplifier on internet.
12AX7 + 6AQ5 + Look-T Opt and diode rectifier with Look-T chock.



 
This Amplifier had been modify so many time.
With Opt second side feed back to 12AX7 cathode bias.




Take off Opt second side feed back to 12AX7 cathode bias.
Modify 12AX7 and 6AQ5 bias and change couple capacitor ...Bennic cap not good.

Outstanding music of hyperlink for tuning sound color

Josef Wolfsthal(vi) 1929 Berlin Phillharmonic Orchestra Manfred Gurlitt(con.) Violin Concerto In D Major,Op.61/Beethoven


Western Electric 757-A Monitor System ←WE212-DSing.le Power Amplifier by EIFL (WE212D←WE205D←WE417A←STC5R4GY×4 ←WE274B←412A←Marantz 7C←Wilson Benesch　 The CIRCLE、ACT-0.5


Saxophne Colossus/Sonny Rollins Quartet Prestige 7079をWE24Aホーン+594


Martzy & Antonietti plays Handel (Op.1 No.3)





Outstanding utility for separate Youtube's music from viedo file.

http://youtubemp3.tv
Method:
Choice favor Youtube video than copy http://???????/ attach to youtubemp3.tv window for start program.
Then choice format High Quality MP3 Download option.
When finish process your could see Icon of Download .mp3 file pop out.

Click Icon of Download .mp3 file start download to your local computer.