Firebottle
06-03-2016, 16:19
Here is a valve phono amp using conventional circuitry design that is now surplus to requirements.
This is all triode, Mullard ECC83, plus CV? ECC81, then ECC82, with traditional mains transformer PSU.
In order to provide ventilation and to show the valves I opted for a perforated front panel.
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Frontview.jpghttp://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Rearview.jpg
Internal shot, slightly modified (improved) since:
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Ampsection.jpg
Now has two blue LEDs to indicate power on:
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/P1030655.jpg
MM 47k ohms input, gain 45dB. Original thread http://theartofsound.net/forum/showthread.php?24632-New-phono-project-%96-valve-of-course&highlight=valve+phono
Looking for £200,
:)
This is all triode, Mullard ECC83, plus CV? ECC81, then ECC82, with traditional mains transformer PSU.
In order to provide ventilation and to show the valves I opted for a perforated front panel.
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Frontview.jpghttp://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Rearview.jpg
Internal shot, slightly modified (improved) since:
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/Ampsection.jpg
Now has two blue LEDs to indicate power on:
http://i601.photobucket.com/albums/tt97/Paramotorpilot/MM%20Preamp/Triode%20MM%20preamp/P1030655.jpg
MM 47k ohms input, gain 45dB. Original thread http://theartofsound.net/forum/showthread.php?24632-New-phono-project-%96-valve-of-course&highlight=valve+phono
Looking for £200,
:)