André,
Thank you for sharing updates and build pics. Good luck with the rest of it, and hope you will be making music soon. I am another one who wants to build the USSA 5 and got the PCBs from Fab a while back, but the project is still awaiting a few parts here and there... Hope to get it done eventually. In the meantime learning through the experience of fellow diyA forum members. 🙂
Thank you for sharing updates and build pics. Good luck with the rest of it, and hope you will be making music soon. I am another one who wants to build the USSA 5 and got the PCBs from Fab a while back, but the project is still awaiting a few parts here and there... Hope to get it done eventually. In the meantime learning through the experience of fellow diyA forum members. 🙂
Nice work André!
Can't wait to see the final build!
PS, try to keep those AC lines as much in the middle of the chassis as possible to avoid AC noise contamination into the amp modules.
All the best!
Do
Can't wait to see the final build!
PS, try to keep those AC lines as much in the middle of the chassis as possible to avoid AC noise contamination into the amp modules.
All the best!
Do
Hello Do,
Can’t wait to see and HEAR the final build too! 🙂
Thank you for your suggestion, I will try to put the AC lines in to the cellar (between mounting and bottom sheet if possible or use a shielding).
I will see what fits and what works, but I will stay in the middle.
Do you know if ferrite rings make any sense in an amplifier?
Have a nice evening.
CU
André
Can’t wait to see and HEAR the final build too! 🙂
Thank you for your suggestion, I will try to put the AC lines in to the cellar (between mounting and bottom sheet if possible or use a shielding).
I will see what fits and what works, but I will stay in the middle.
Do you know if ferrite rings make any sense in an amplifier?
Have a nice evening.
CU
André
Dimensions
Does someone have the exact dimensions of the latest ussa-5 pcbs? I don't think the info in the manual is correct.
Also, the heatsink drill template with dimensions - the one I found in the gb thread doesn't have any dimensions.
Thanks,
Does someone have the exact dimensions of the latest ussa-5 pcbs? I don't think the info in the manual is correct.
Also, the heatsink drill template with dimensions - the one I found in the gb thread doesn't have any dimensions.
Thanks,
Hi
The manual shows dimensions of pcb v 0.1 and 0.2.
Last pcb version 0.4 has a smaller size. See attached mounting holes relative positions.
Fab
Attachments
thanks all.
Would it be alright to solder wires to the MOSFETs, instead of soldering them directly on the PCB? If yes, any max length recommended? reckon shorter is better. This is for some flexibility with cabinet design - by keeping the PCB away from the heatsink.
Would it be alright to solder wires to the MOSFETs, instead of soldering them directly on the PCB? If yes, any max length recommended? reckon shorter is better. This is for some flexibility with cabinet design - by keeping the PCB away from the heatsink.
You can do this, but I would avoid it if possible. Keep,wires as short as possible.
The boards are small, so I would just do as Fab has designed. You also would have to put your tempco devices on flying leads, How would you mount them?
I would strongly avoid doing this.
Cheers,
Greg
The boards are small, so I would just do as Fab has designed. You also would have to put your tempco devices on flying leads, How would you mount them?
I would strongly avoid doing this.
Cheers,
Greg
Entirely agree!
I will add that the gate resistances of the mosfets have been set to have the shortest possible path and that a wiring will remove this important benefit.
I will add that the gate resistances of the mosfets have been set to have the shortest possible path and that a wiring will remove this important benefit.
Ok. Won't. 🙂
Just exploring options at the moment and planning, so your inputs are very valuable. Have the boards and components.
Just exploring options at the moment and planning, so your inputs are very valuable. Have the boards and components.
Don't over think your build, just populate your boards, test, calculate, finish the build and listen!
Hello André
Your project looks good and given the quality of the elements that make up your power supply, I think your USSA will dishevel! Take good care to follow the steps of the manual and do not hesitate to ask for help if necessary.
😉
Yes, the urge to jump in is high. But I am not planning the amp. I am planning for the cabinets.
Always felt that the aesthetics of my F5T and peeceebee are lacking, especially when I see some of the fantastic assemblies in the pics threads.
Hi I just want to inform you all I was forced to stop with this project because of the missing 2PC, 10K trimmers. I could go on and set up the one channel so with some help we calculate the missing resistors. The truth is I want to do both the same time because of the mentioned calculation. I purchased those trimmers from eBay and it will take who knows how long to receive them. Now Canada Post office back and working I hope I receive bere the end of the year. I also have a problem with Parts Connexion, they shipped my order 4PC resistors short at Nov 1. I already called them twice, wrote a couple time also and no answer. Dave (sales representative) promised me twice he will look into that e-mail but nothing happened. We are so busy ............ It frustrating when they promise and after nothing. It looks like I will be forced to file a claim at ay Pal. I really do not want but what can I do when they do not even return an e-mail. This year I having a problem with them at the second time, unfortunately.
