Hi all,
Here are the related documents for the 2 additional PCBs I made.😉
I am also reminding you, these PCBs are brand new and although I tried to pay as much attention I could while designing those for the purpose of this GB, a yet to be discovered hidden mistake remains a possibility. Hopefully there will be none present but .....
So feel free to review and feedback if you see any mistake (schematics or parts).
-- Eric
Here are the related documents for the 2 additional PCBs I made.😉
I am also reminding you, these PCBs are brand new and although I tried to pay as much attention I could while designing those for the purpose of this GB, a yet to be discovered hidden mistake remains a possibility. Hopefully there will be none present but .....
So feel free to review and feedback if you see any mistake (schematics or parts).
-- Eric
Agreed. Alex's spreadsheet is probably the place that all updates should go as there is too much chance for error in this format. Mine isn't right for starters:
guyisme +2
Oneminde +1
emyeuoi +2(also 2x salas shunt pcb)
fencki +2(also 2x salas shunt pcb)
Pars +3 (also 3x Salas shunt pcb pairs)
astromo +1
JoeyDD +1? (also 1 or 2 extras of the board to substitute in a current UGS)
carsten.witt +1
Stanney2017 +1
myl +1
vannhoem +2(also 2x salas shunt pcb)
Boydk +1
Torvbakkane +1
HelmutHolz +1
Awh +1
Dennis Hui +1(and an extra for an older UGS kit)
ItsAllInMyHead +1
axelcs +1
elwood625 +1
Stones +1?
schultzsch +1(also the salas shunt psu pcbs)
finwbu +1
drpro +1
twitchie +1
miksi +1
Redjr +1
Analogdiy +1
Potepuh +1
Gyuri +2
total 36 pcbs
Last edited:
guyisme +2
Oneminde +1
emyeuoi +2(also 2x salas shunt pcb)
fencki +2(also 2x salas shunt pcb)
Pars +3 (also 3x Salas shunt pcb pairs)
astromo +1
JoeyDD +1? (also 1 or 2 extras of the board to substitute in a current UGS)
carsten.witt +1
Stanney2017 +1
myl +1
vannhoem +2(also 2x salas shunt pcb)
Boydk +1
Torvbakkane +1
HelmutHolz +1
Awh +1
Dennis Hui +1(and an extra for an older UGS kit)
ItsAllInMyHead +1
axelcs +1
elwood625 +1
Stones +1?
schultzsch +1(also the salas shunt psu pcbs)
finwbu +1
drpro +1
twitchie +1
miksi +1
Redjr +1
Analogdiy +1
Potepuh +1
Gyuri +2
trung224 +2 (also the salas shunt psu pcbs)
total 38 pcbs
Oneminde +1
emyeuoi +2(also 2x salas shunt pcb)
fencki +2(also 2x salas shunt pcb)
Pars +3 (also 3x Salas shunt pcb pairs)
astromo +1
JoeyDD +1? (also 1 or 2 extras of the board to substitute in a current UGS)
carsten.witt +1
Stanney2017 +1
myl +1
vannhoem +2(also 2x salas shunt pcb)
Boydk +1
Torvbakkane +1
HelmutHolz +1
Awh +1
Dennis Hui +1(and an extra for an older UGS kit)
ItsAllInMyHead +1
axelcs +1
elwood625 +1
Stones +1?
schultzsch +1(also the salas shunt psu pcbs)
finwbu +1
drpro +1
twitchie +1
miksi +1
Redjr +1
Analogdiy +1
Potepuh +1
Gyuri +2
trung224 +2 (also the salas shunt psu pcbs)
total 38 pcbs
guyisme +2
Oneminde +1
emyeuoi +2(also 2x salas shunt pcb)
fencki +2(also 2x salas shunt pcb)
Pars +3 (also 3x Salas shunt pcb pairs)
astromo +1
JoeyDD +1? (also 1 or 2 extras of the board to substitute in a current UGS)
carsten.witt +1
Stanney2017 +1
myl +1
vannhoem +2(also 2x salas shunt pcb)
Boydk +1
Torvbakkane +1
HelmutHolz +1
Awh +1
Dennis Hui +1(and an extra for an older UGS kit)
ItsAllInMyHead +1
axelcs +1
elwood625 +1
Stones +1?
schultzsch +1(also the salas shunt psu pcbs)
finwbu +1
drpro +1
twitchie +1
miksi +1
Redjr +1
Analogdiy +1
Potepuh +1
Gyuri +2
trung224 +2 (also the salas shunt psu pcbs)
leejh +2 (also the salas shunt psu pcbs)
total 40 pcbs
Oneminde +1
emyeuoi +2(also 2x salas shunt pcb)
fencki +2(also 2x salas shunt pcb)
Pars +3 (also 3x Salas shunt pcb pairs)
astromo +1
JoeyDD +1? (also 1 or 2 extras of the board to substitute in a current UGS)
carsten.witt +1
Stanney2017 +1
myl +1
vannhoem +2(also 2x salas shunt pcb)
Boydk +1
Torvbakkane +1
HelmutHolz +1
Awh +1
Dennis Hui +1(and an extra for an older UGS kit)
ItsAllInMyHead +1
axelcs +1
elwood625 +1
Stones +1?
schultzsch +1(also the salas shunt psu pcbs)
finwbu +1
drpro +1
twitchie +1
miksi +1
Redjr +1
Analogdiy +1
Potepuh +1
Gyuri +2
trung224 +2 (also the salas shunt psu pcbs)
leejh +2 (also the salas shunt psu pcbs)
total 40 pcbs
Great Eric,
what is the purpose of R14, R104, R11, R102, C5, C105 ? They are not in the original Salas's design.
Also i do not see Rf at the input before C1, C101..
Attachments
These are just compensation network to address potential stability issue.
I have preferred to add these based on one report of a trend to oscillate by one end-user and its way to cure the issue.
It is far easier not to solder a part that to add one that was no planned.😉
Here is the effect of such filter on the output impedance of the shunt regulator in function of different C5,C105 values.
So bottom line you may try without it also or with lower C values.
Though, not sure it makes any sonic difference.
The global post rectifiers filter approach is different, I used common mode choke instead of Rf.
Attachments
Thanks Eric. A quick message on my side to tell that I am very busy again and late on a lot of MP. Apologies and I am trying to catch up and move on the payment phase over the weekend.
No worries, its better to be late than never and in the end, we got a nice bonus from Eric... so I am not complaining 🙂
no reason to hurry or explain.
whenever you are ready. we can wait.
this time is good for all of us to enjoy and chillout...
stay safe and thaank you!
Hi all. Could you let me know if you put Salas board inside the UGS box and apply 24V for UGS, the connecting diagram be like this:
Right_preamp v1.2 Note.pdf - Google Drive.
Sorry for my English.
Right_preamp v1.2 Note.pdf - Google Drive.
Sorry for my English.
When it says "full kit" in the spreadsheet, does it then include the filtering board along with the salas shunt?
The Salas board takes place in between the logic supply board and the preamp board.
On the preamp board, you have just to configure it for +/-24V operation (see the description inside the BOM of the preamp board).