中音路- 離子高音 Plasma Tweeter of 2.1 channel ...5

Finish 6C45Pi & IF circuit connection and check working bias voltage.


Top view under real testing.


Final check cross-over switching circuit for prepare feed in S.G. signal.


First time generat plasma flaming (small fire).


Re-modify structure of voice-coil  actuator.


Use new voice-coil  actuator to light up plasma flaming.


After finish shieding-net and check effect of plasma generat.





Youtube file Mr211 Plasma tweeter

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.