re-edit 頻率響應是不是唯一的東西........................................ recalled the struggle of The speakers making by hand just for good sound article

  everything start from here...since 2013

頻率響應是不是唯一的東西 

 譯...Ultraudio   Frequency Response Isn’t the Only Thing

http://www.ultraaudio.com/opinion/20100501.htm

the choice of crossover topology

the fs of woofer choice

the imp. profile of 15'' woofer (exp.)

the impedance of 15'' woofer match example

woofer Impedance matching conjugate example

Impedance xcover profile of 8 ohm mid horn driver

Impedance xcover profile of 16 ohm mid horn driver

mid horn Impedance value deceive by how many driver cascade

purchase wrong tube socket of big 12 pin

socket pin grap force too weak

for 6jm6 size too big

Dim. record

recived ...shipping from China

DAC rectify tube 6z4 change to 6x4 ~2

drill slot because double trace layout

playback -1 ...before

                                                      ... after

playback -2 ...before

                                                      ... after

playback -3 My all ...before

                                    ... after  w obviously diff. fu

                                         Mariah Carey wesome

                                            my all ～黃小虎

playback -4 ...before

                                   ... after  oops wrong record

playback -5 ...before

                                                      ... after

 

rectify tube 6z4 change to 6x4

6x4 raytheon

                              6Z4 北京曙光

tube amp. DAC w 6z4....coffee shop

https://kao211.blogspot.com/2012/10/da-build-in-human-vocal-4-times.html

https://kao211.blogspot.com/2023/07/jukeboxss-audio-amplifier-modify-volume.html

before tube Tung-Sol 6x4
replaced rectify tube  by 6x4 raytheon
sound more nature ~ more detail

low noise amp. w 6x4 raytheon inside

https://kao211.blogspot.com/2024/07/diy-another-rare-low-noise-tube-pre_28.html

Happy jukebox day

 

re-placement high voltage transformer......need re-order high voltage transformer

new order high voltage transformer

re-placement

take off choke inductor
the space for dual rectifier cap.

 

P-P circuit implement......this case just could tie circuit to push pull amp.

CH-R 6JM6 PP playback sound 1

CH-R PP 6JM6 G1 shunt Imp.resistor tie to GND

CH-L PL519 PSE playback

CH-R 6JM6 PP playback sound 2

CH-L PL519 PSE playback

CH-R 6JM6 PP playback  sound 3

CH-L PL519 PSE playback

CH-R PP 6JM6 G1 shunt Imp.resistor tie to -32V playback sound 1

CH-R PP 6JM6 G1 shunt Imp.resistor tie to -32V playback sound 2

CH-R PP 6JM6 G1 shunt Imp.resistor tie to -32V playback sound 3

CH-R PP 6JM6 G1 shunt Imp.resistor tie to -32V playback

CH-L PL519 PSE playback

CH-R 6JM6 PP playback w RIAA (switch in DAC)

CH-R 6JM6 PP playback no RIAA (switch in DAC)