Pictures of your diy Pass amplifier

Nice work! Reminiscent of the original Aleph series amps (albeit from the front only). How do they sound?

They sound clear. There is no obvious technical problems, no humming, no noise.
However I do not have proper speakers at home to properly appreciate these amps (how lame is it!). I am thinking of making Troels Gravesen TQWT speakers to match them. But it will take some time.
 
My F6

some fine tuning left :)
 

Attachments

  • 954C0FD3-0CEF-40B5-95AE-67A17FE5F07C.jpg
    954C0FD3-0CEF-40B5-95AE-67A17FE5F07C.jpg
    727.5 KB · Views: 1,037
  • 6CD5E93D-10C5-4A5E-B71A-2AE1FF6EA31C.jpg
    6CD5E93D-10C5-4A5E-B71A-2AE1FF6EA31C.jpg
    998.6 KB · Views: 1,016
  • 76AB3F05-D6C8-4893-BDA7-8BA89E32F273.jpg
    76AB3F05-D6C8-4893-BDA7-8BA89E32F273.jpg
    1,009.4 KB · Views: 1,009
Harman Kardon Citation 12 Pass Labs DIY power amps

Here' s some pictures of two stereo power amp i did based on PassLabs Citation MOSFET complementary outputs IRF240-9140.
PCB is from member here TAZZZ.
I've had two of those HK Cit12 and i only kept chassis, power transformers.
Did exact as per schematics with some 1% resistors and bourns 15T trimpot for bias.
Both amp do have a relay delay turn-on feature protecting speakers.
Bias at 200mA and offset below 30mV.
Heat sink temp runs about 90F,

Front is solid walnut with blue LED for each B+ and clipping indicator.
I have 60000uF per channel and B+ is +/-40,5 Vdc.
Lots of clean power in 8 and 4 ohms load, great sound


Thanks to Mr. N. Pass !!
 

Attachments

  • 20210127_194646.jpg
    20210127_194646.jpg
    1,016.8 KB · Views: 928
  • 20210127_194634.jpg
    20210127_194634.jpg
    866 KB · Views: 906
  • 20210127_194436.jpg
    20210127_194436.jpg
    1 MB · Views: 894
  • 20210126_104700.jpg
    20210126_104700.jpg
    989.1 KB · Views: 871