Just like ggetzoff, I had read sparse reviews about the USSA-5 here and there but from what I read, piqued my interest. I contacted Fab to see about purchasing a pair of boards but was saddened when he informed me he did not have any boards for sale. Instead, he kindly offered to give me a pair of boards with only one condition: I build and provide a review of the amp. I have been occupied by other things and have not kept to the timeline I agreed to. That changed after I saw ggetzoff’s post which reminded me to stop being lazy and complete the amp. I just need to complete the power supply in order to test the amp modules per instructions. Then I need to finish the chassis, get it powder coated, finally assembly and review!
Here the boards have been assembled for a few months now. I also have it on the heatsinks.
Here the boards have been assembled for a few months now. I also have it on the heatsinks.
Attachments
-
3DEB5D45-5A8B-401F-987D-5F18761E3EE5.jpg -
460BD5B6-23EC-420F-BE18-DE1ECE5F7267.jpg -
50B64985-6479-4A6D-B541-2F73972B575D.jpg -
3F50D824-7B28-450C-B909-806B0C0D53F8.jpg -
BC83551C-AB36-420A-8208-BFBB6BF6C628.jpg -
229A7734-D9C3-4961-A489-ABA786A7AD2F.jpg -
8A3BDCFE-BB26-42D5-9046-BEC651B53AF1.jpg -
8E144117-7E72-4F2A-950A-5052D4BAD603.jpg
Looking forward for your review.
I had the chance to deal w Fab on many occasions and he’s a very generous and kind person.
Good luck w your amp.
I had the chance to deal w Fab on many occasions and he’s a very generous and kind person.
Good luck w your amp.
Hi!
Looking good! Love the heatsink color!
What are the diameters of the test point holes on these pcb’s? 0.040 inches or 0.062 inches?
Thanks,
Anand.
Looking good! Love the heatsink color!
What are the diameters of the test point holes on these pcb’s? 0.040 inches or 0.062 inches?
Thanks,
Anand.
Last edited:
Hi
Thanks for interest and post 🙂
You seem to have nice and big heatsinks which makes it perfect to increase bias furthermore and especially if you have 4 ohms speakers to increase class A power. Or you can also slightly increase PSU voltage to get a little more power in class AB.
From your pictures I seem to notice a possible mistake for P2 and P4 which value seem to reversed. P2 should be 10k (103) and P4 should be 1K (102).
Remember that if you follow the manual and test each mounted section (CCS, input stage, medium stage, output stage) one at a time you normally get a working amp board at end of test procedure. Step-by-step testing makes it easier I believe.😉
Looking forward to seeing the final assembly (internal and outside).
Good luck
Fab
Thanks for interest and post 🙂
You seem to have nice and big heatsinks which makes it perfect to increase bias furthermore and especially if you have 4 ohms speakers to increase class A power. Or you can also slightly increase PSU voltage to get a little more power in class AB.
From your pictures I seem to notice a possible mistake for P2 and P4 which value seem to reversed. P2 should be 10k (103) and P4 should be 1K (102).
Remember that if you follow the manual and test each mounted section (CCS, input stage, medium stage, output stage) one at a time you normally get a working amp board at end of test procedure. Step-by-step testing makes it easier I believe.😉
Looking forward to seeing the final assembly (internal and outside).
Good luck
Fab
Nice to see another USSA 5 build underway. 🙂 And the color of the heat-sinks should make for a pretty distinct looking chassis.
Good luck with the build and keep the updates coming.
Good luck with the build and keep the updates coming.
Hello and thank you! I’m not sure how big the holes are. The pins I soldered on wobbled in the hole prior to soldering. Perhaps Fab or someone can chime in.
Bao
Hi bvtrinh, nice and congrats could you share the test point type or post a link were you find it,
Thanks
FR
Hello and thank you! I believe I purchased it here: Lot of 20 SAMTEC TS-109-G-C HEADER SIP VERT 9 PIN SOLDER FORK TERM .1C GOLD | eBay
- Status
- Not open for further replies.