😱
When I moved, I couldn't trust anyone else to carry my gear... I was very tired after that day.
Have you guys seen this video? It shows the PASS LABS amps without covers and some minor details given by Waine.
https://www.youtube.com/watch?v=Ytqk_9z0KMQ
https://www.youtube.com/watch?v=Ytqk_9z0KMQ
I'm by no means as talented as some of you guys and this is my first amplifier I have cobbled together.
Here's my Aleph J none the less.
Thanks to Papa and this community as a whole for so many of you asking and answering questions which I, in turn, didn't need to ask 🙂
I need to finish some cabling inside; IEC earthing.
I used heatsinks from birmingham aluminium (20min drive away) and the sides are 5mm frosted black acrylic.
Here's my Aleph J none the less.
Thanks to Papa and this community as a whole for so many of you asking and answering questions which I, in turn, didn't need to ask 🙂
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I need to finish some cabling inside; IEC earthing.
I used heatsinks from birmingham aluminium (20min drive away) and the sides are 5mm frosted black acrylic.
...no i hadn't...thank...especially interested with XS Pre but that wasn't shown very much.
and it is noticed that the the UGS modules are not there in all the others 🙂
But great !!!
Here are some pictures of my BA3 FE preamp. Using a relaixed passive as attenuator and input selector and a Salas Shunt regulator to power the BA3FE.
Some pictures:
Front panel: Black knob is a push button/rotary encoder. It controls on/off switching, input selection and volume.
Inside of back panel, and big regulator heatsink!
I made a mistake on the back panel, the 1-4 numbers should be reversed and the number order doesn't match the PCB so I had to invert the wires inside...
I made two big rectangular cutouts beneath each regulator heatsink to have a lot of ventilation...
... and a vented upper panel.
"Loop" is a loop out from the inputs, "0db" is direct output from the attenuator making it a passive preamp and"gain" is output from the BA3 gain stage. So quite some flexibility for the future.
The two female IEC connectors are switched via a 10A/250V relay by the preamp controller so I can connect the phono stage and power amp and make the entire system switch on/off with a single push of a button.
Some pictures:
Front panel: Black knob is a push button/rotary encoder. It controls on/off switching, input selection and volume.
An externally hosted image should be here but it was not working when we last tested it.
Inside of back panel, and big regulator heatsink!
An externally hosted image should be here but it was not working when we last tested it.
I made a mistake on the back panel, the 1-4 numbers should be reversed and the number order doesn't match the PCB so I had to invert the wires inside...
An externally hosted image should be here but it was not working when we last tested it.
I made two big rectangular cutouts beneath each regulator heatsink to have a lot of ventilation...
An externally hosted image should be here but it was not working when we last tested it.
... and a vented upper panel.
An externally hosted image should be here but it was not working when we last tested it.
"Loop" is a loop out from the inputs, "0db" is direct output from the attenuator making it a passive preamp and"gain" is output from the BA3 gain stage. So quite some flexibility for the future.
An externally hosted image should be here but it was not working when we last tested it.
The two female IEC connectors are switched via a 10A/250V relay by the preamp controller so I can connect the phono stage and power amp and make the entire system switch on/off with a single push of a button.
An externally hosted image should be here but it was not working when we last tested it.
Nice build!
Is your BA3 DC coupled? I can't spot any output coupling caps. Is there any DC offset? Does it drift over time?
Also, are you feeding the pre with DC from the psu enclosure?
Is your BA3 DC coupled? I can't spot any output coupling caps. Is there any DC offset? Does it drift over time?
Also, are you feeding the pre with DC from the psu enclosure?
I have electrolytic elma silmic in the BA3 board. near the side panel, they are quite small!! Will be replaced by film capacitors in the future.
The PSU enclosure has the diode bridge a smoothing capacitors yes, it is DC traveling in the umbilical cable.
Here a small movie of the complete system playing!!
No global feedback design overall:
Salas Njfet phono pre
Pass BA3FE preamp
F4 power amp
After many years dreaming and thinking about making a class A pre/power amp combo I finally have it playing in my living room!! Now I shall navigate to the diy speaker realm in search of quality project to replace my rega speakers!!
https://www.youtube.com/watch?v=OpMUCAIiMUY
No global feedback design overall:
Salas Njfet phono pre
Pass BA3FE preamp
F4 power amp
After many years dreaming and thinking about making a class A pre/power amp combo I finally have it playing in my living room!! Now I shall navigate to the diy speaker realm in search of quality project to replace my rega speakers!!
https://www.youtube.com/watch?v=OpMUCAIiMUY
Lefty
Greetings,
My latest experiment is Lefty* the Robot Amp Camp Amp or L'raca! It is a surprising little amp seen here sitting on top of my B1.
The tiny PCB makes for an interesting format. It is almost like the amp is a separate living thing in symbiosis with the heat sink. You can see how it all comes off and could be fitted to any adequate heat sink.
The heat sink was a scrap yard experiment and Lefty gets his name from his "lucky fin" just a bit smaller than his right. The whole thing works great only hitting 117F (about 30 degrees above ambient).
Amp Camp Amps are not just for beginners. They allow for a bunch of creativity and have impressive sonics! Do have some fun with one of these!
Greetings,
My latest experiment is Lefty* the Robot Amp Camp Amp or L'raca! It is a surprising little amp seen here sitting on top of my B1.
The tiny PCB makes for an interesting format. It is almost like the amp is a separate living thing in symbiosis with the heat sink. You can see how it all comes off and could be fitted to any adequate heat sink.
The heat sink was a scrap yard experiment and Lefty gets his name from his "lucky fin" just a bit smaller than his right. The whole thing works great only hitting 117F (about 30 degrees above ambient).
Amp Camp Amps are not just for beginners. They allow for a bunch of creativity and have impressive sonics! Do have some fun with one of these!
Attachments
Yes, that is some very nice art work, indeed! It is amazing what can be done sometimes with scrap yard parts.