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| AMI R1-1G vintage Jukebox |
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| find a home for him |
2026年1月11日 星期日
so sad only could cage him in garage ....after revival him
2026年1月10日 星期六
table DAC trimmer position
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| open case screws touch the volume trimmer cause one channel loses sound |
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| open case for change Raytheon rectify tube 6x4 |
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| record trimmer volume |
2026年1月9日 星期五
Rock Ola 495 1975 open box notifycation
 |
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| open upper cover |
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| tone arm green wire take off |
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| take off these fix tapes |
https://kao211.blogspot.com/2023/06/jukeboxs-1970s-old-friend-gone2.html
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| before Jukebox playback need 110VAC to 100VAC transformer |
會動的部件固定措施都要排除
2025年12月30日 星期二
HK 西電胡 WE205D's phono stage of WE129A ~duplicate vintage WE riaa profile
 |
2012 master WE205D |
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| @500hz~10khz close real 600ohm Imp. |
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| the RIAA after 1954 |
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| totaly diff. |
20260104 33rpm vinyle playback...Eva Cassidy
2023
2023
the sound of w.e. drive Jensen 3 ways horn spk
Clone WE 131a amp 19 February 2023
Clone WE91a 22 February 2023
3
2017
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| mono w.e. 212 |
 |
| 2014 |
 |
| 2013 |
 |
| we 618B |
Clone WE 41,42,44A.
Clone WE 41+42,44A.
2012
03 Maria Elena.wav of Español
The sound of WE
CAMERATA of Korean
2009 CAMERATA of Korean
2025年12月27日 星期六
Vinyl @phono stage RIAA profile modify～negative feedback
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| usage OP negative feedback |
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| 45 rpm vinyle playback |
right channel playback @20.8Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
left channel playback @139Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
 |
| 33 rpm Vinyle playback |
left channel playback @139Hz～2.1Khz
Complex frequency synthesizers produce distorted and crackling sounds.
right channel playback @513Hz～2.1Khz
Complex frequency synthesis sounds normal
upper DAC preamplifier playback vinyle
Complex frequency synthesis sounds normal
 |
| switch to lower DAC preamplifier playback vinyle |
lower DAC preamplifier playback vinyle
Complex frequency synthesis sounds normal
 |
| 45rpm 7'' & 33rpm 12'' switch by diff. source |
 |
| select playback source between technics-sp10 and Garrard 401 |
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| suddenly ...Technics-sp10 turntable not work check no 32VDC |
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| Btw Technics-sp10 power supply connect to turntable the 140V will boster to 260V |
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| record Garrard 401 AC power setting |
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| https://www.stereophile.com/content/emt-128-phono-preamplifier |
 |
| EMT-128phono stages |
 |
| EMT JPA-66 phono stages |
 |
| Remton LCR Mk2 phono stages https://the-ear.net/review-hardware/remton-lcr-mk2-phono-stage/ |
 |
| Moon by Simaudio 310LP |
 |
| FM Acoustics 222 phonostage |
Evething since ... the dazzling JPA66 phono preamp
The last WE129A Shenzhen friend ordered ...legend never ever
https://kao211.blogspot.com/2022/05/the-last-we129a-shenzhen-friend-ordered.html
https://www.stereophile.com/content/emt-128-phono-preamplifier-measurements
 |
| viewpoint of amp. flatness (I think the test feed in vinyl sweep signal w RIAA profile) |
 |
| 30dB@10Hz~500Hz |
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| STD RIAA 20dB@10Hz~500Hz |
Vinyl Phono stage with x10 transformer Amplifier
https://kao211.blogspot.com/2022/04/vinyl-phono-stage-with-x10-transformer.html
Vinyl Phono stage with x10 transformer Amplifier -1 Jfet
https://kao211.blogspot.com/2022/05/vinyl-phono-stage-with-x10-transformer.html
Vinyl Phono stage with x10 transformer Amplifier -2 ...first time playback
https://kao211.blogspot.com/2022/05/inyl-phono-stage-with-x10-transformer.html
reduce hum sound on vinyl playback pre-amplifier and vinyle phono stage
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