中音路- 離子高音 Plasma Tweeter of 2.1 channel ...4

Set Up a platform for hard disk drive voice-coil actuator


Light up plasma using a hard disk drive voice-coil actuator.


Change 500V  high voltage transfer for more energy to light up plasma flaming.


Finish retuning 6JM6,ECL82,6C45Pi plate voltage and bias voltage.


Rear view.



Feed in S.G. signal test plasma tweeter and monitor high voltage.

中音路- 離子高音 Plasma Tweeter of 2.1 channel ...3

Finish internal circuit connection.


Finish bottom platform circuit connection.


Finish 6JM6 platform and Tesla coil install.

 
Prepare test Tesla coil flame.


Rear view.



Front view. After test high-voltage need modify circuit.
6jm6 tube suitable for plasma amplifier still need for estimate.

中音路- 離子高音 Plasma Tweeter of 2.1 channel ...2

For good shielding reason I put shielding net on rack.


Therefor Alumni plate will contact shielding net well.


Install crossover switch module.


Drill hole for well  proper layout of amplifier.


Connect relay DC control wire for crossover switch module.


Set 12V transformer for relay DC control usage.


Mount 4 transformers. 5U4G heater transformer ,chock, 6.3V transformer, crossover transformer.


Finish AC main power switch circuit (include a AC delay-on relay).


Finish AC power and Tube heater circuit prepare for turn-on test.


Real  test and check each point voltage.


Finish connect wire of  crossover switch module and make a test  of mode switch.



This weekend the last schedule.

中音路- 離子高音 Plasma Tweeter of 2.1 channel ...1

Old crossover connection block.


New Plasma Tweeter of 2.1 channel amplifier block.


Design wood rack for Plasma tweeter system and size must small and compact suitable for put on woofer box.


After placement design and finish assembly Layer1 module for Plasma tweeter high voltage circuit  and  Audio feed- in circuit and generate I-F modulate circuit.
Tube 5U4G,6C45Pi,ECL82,6JM6.


Paint wood racks for good looking.


Assemble and estimate rack design.


Check rack  in step by step list.


This Layer module will design for high voltage radiation , like RF power amplifier.
For band 5K~40K audio signal radiation.



Switch relay module could switch mode between Old crossover and New Plasma Tweeter of 2.1 crossover.

D/A build in the human vocal 4 times frequency gain tuning module

Original dac top view.
After tuning couple capacitor sound color change other capacitor.
For more space to fit x4 frequency gain tuning module.


After modify the system block.



3.5k-8.5k 高次偶次諧波 band pass filter simulation profile.



Estimate more space for filter inductor.


Fine tune PCB top dimension.


Fix band pass filter inductor.


Fix pcb board  on aluminum plate.


Finish circuit and assembly all plate together.


Put module into DAC and finish wire connection.


Fix volume knob.


Finish wire connection on volume knob.


Finish side view.
今調整...幾乎無法再調回去.
聲音的寫真程度改變幅度很大.
音符好像快從喇叭跳躍出來一樣.
...

 CD也可以有類似LP的聽感
真的是蠻神奇的.

上圖 Tesla 線圈靠近螺柱與外殼還不影響震盪發震, 控制很利害.
下圖 PL519 drive Tesla coil 線圈後 輻射線 (白色)高頻線,又拉回 隔板下IF(中頻)連接輻射頭 ,這可能是機構夠裝上的妥協.
另輻射震盪 如無回授(沒看到回授線 pick wire)又是另一個控制很利害, 因很難穩定!



上圖輻射頭上 導波管(白色)聽說是石英屬耗材, 但外觀看較像陶瓷Horn,因這裡有高熱.
音展問過代理商 積碳問題, 回覆有轉屬~'激絲' 可從正前方深入導波管射頭上清理.

Horn朝前 & 跟無指向360度 聽感有差.

PSE Amplifier PL519 check sound color

PL519+6JM6 PSE Amplifier


PL519 check sound color


德國 Telefunken PL519    音場淺且後場有些交代不清,音像較凸出,人聲刻畫較清晰音色較渾厚
高音響應弱 不飄逸,低音較渾厚些.


Valvo & ITT 石英支撐架外型 如紅線圈示 與 Telefunken  一致, 同廠代工 音色反應一致.


Valvo & ITT     工廠特有 倒三角 特有印記.
Telefunken 反倒無此印記.



PHILIPS PL519 人聲刻畫較淺,音像較淺, 7Khz~10Khz 較凸出,高音響應音色線條清楚些,低音較有形體沉一點.


Sylvania PL519 人聲刻畫較矇, 高音響應也較矇些  屬整體THD較差者.



SIEMENS   PL519 人聲刻畫清晰且音像刻畫較深, 低音較有形體也沉, 較平衡.
與離子高音上 PL519 所測音感相仿.

石英支撐架外型  與Telefunken 不同, 印記如紅線圈示,特有中國騰雲印記.