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Old 20th June 2018, 11:53 PM   #21
fab is offline fab  Canada
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USSA-5 PCB GB
Quote:
Originally Posted by thimios View Post
If this option still available what color we ask for?
See post 101: red first , orange second
Fab
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Old 21st June 2018, 02:55 PM   #22
sledwards12375 is offline sledwards12375  United States
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Join Date: Oct 2008
Location: North Carolina
1) Patriz 1 set
2) nfsgame, Germany - 2 sets
3) baswamin, India - 3 sets (1 set each for baswamin, Samuel Jayaraj, Manniraj, common shipping to baswamin)
4)Thimios-2 sets(4 pcb)
5)ravid, India - 3 sets
6) BDL, Romania - 1 set
7) Luke - 2 sets
8) vvs07 - 2 sets
9) nounouchet - 1 set
10) PJN, US - 1 set
11) torb, Finland - 1 set
12) theoracle, New Zealand - 1 set
13) JJGB, Finland - 1 set
14) sledwards12375, US - 1 set
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Old 22nd June 2018, 03:34 AM   #23
e_fortier is online now e_fortier  Canada
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Join Date: May 2001
Location: Eastern Canada
USSA-5 PCB GB
1) Patriz 1 set
2) nfsgame, Germany - 2 sets
3) baswamin, India - 3 sets (1 set each for baswamin, Samuel Jayaraj, Manniraj, common shipping to baswamin)
4)Thimios-2 sets(4 pcb)
5)ravid, India - 3 sets
6) BDL, Romania - 1 set
7) Luke - 2 sets
8) vvs07 - 2 sets
9) nounouchet - 1 set
10) PJN, US - 1 set
11) torb, Finland - 1 set
12) theoracle, New Zealand - 1 set
13) JJGB, Finland - 1 set
14) sledwards12375, US - 1 set
15) e_fortier, Canada - 1 set
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Old 23rd June 2018, 04:10 AM   #24
stlblue is offline stlblue  United States
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Join Date: Feb 2004
Location: OH
1) Patriz 1 set
2) nfsgame, Germany - 2 sets
3) baswamin, India - 3 sets (1 set each for baswamin, Samuel Jayaraj, Manniraj, common shipping to baswamin)
4)Thimios-2 sets(4 pcb)
5)ravid, India - 3 sets
6) BDL, Romania - 1 set
7) Luke - 2 sets
8) vvs07 - 2 sets
9) nounouchet - 1 set
10) PJN, US - 1 set
11) torb, Finland - 1 set
12) theoracle, New Zealand - 1 set
13) JJGB, Finland - 1 set
14) sledwards12375, US - 1 set
15) e_fortier, Canada - 1 set
16) stlblue, USA, 1 set
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Old 23rd June 2018, 05:47 AM   #25
meanman1964 is offline meanman1964  Belgium
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Location: Belgium the land of chocolate
Fab ,
I've the red version of boards is there anything changed in the black boards version ?
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Old 23rd June 2018, 12:41 PM   #26
fab is offline fab  Canada
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USSA-5 PCB GB
Quote:
Originally Posted by meanman1964 View Post
Fab ,
I've the red version of boards is there anything changed in the black boards version ?
Meanman64,
Not that much. The black pcb was made a little bit smaller than previous version in order to fit within 100mm max length and get special price. However, when you select 2oz copper or non other basic parameter you do not get the rebate. The rebate is good for 1st prototyping exercice when you experiment. It was also done to adjust for easier fit on heatsink.

The changes from red to black:
1- different pcb size so the mounting holes are now perfectly aligned within 2 fins of heatsink (if you drill completely the holes before tapping). Red pcb still fit but closer to fins so more precision is needed.
2- input transistors in closer proximity to prevent having to bend the leads for thermal contact (thermal contact is more important for the USSA-3 with jfet inputs and not mandatory for ussa-5).
3- gate resistor for M2 closer to gate (although no problem has been experienced with red color Pcb)
4- removal of one unused cap
5- 2 mores holes for the USSA-3 to add components to adjust 2nd harmonic level
6- black colour Pcb

There may be a few other things and Project16 would know.

But in general the red pcb really fit for the purpose and both my USSA-3 and -5 are built with it

Fab

Last edited by fab; 23rd June 2018 at 12:45 PM.
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Old 23rd June 2018, 12:55 PM   #27
niner is offline niner
diyAudio Member
 
Join Date: Oct 2002
Location: USA
1) Patriz 1 set
2) nfsgame, Germany - 2 sets
3) baswamin, India - 3 sets (1 set each for baswamin, Samuel Jayaraj, Manniraj, common shipping to baswamin)
4)Thimios-2 sets(4 pcb)
5)ravid, India - 3 sets
6) BDL, Romania - 1 set
7) Luke - 2 sets
8) vvs07 - 2 sets
9) nounouchet - 1 set
10) PJN, US - 1 set
11) torb, Finland - 1 set
12) theoracle, New Zealand - 1 set
13) JJGB, Finland - 1 set
14) sledwards12375, US - 1 set
15) e_fortier, Canada - 1 set
16) stlblue, USA, 1 set
17) niner, USA, 1 set
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Old 23rd June 2018, 02:17 PM   #28
e_fortier is online now e_fortier  Canada
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Join Date: May 2001
Location: Eastern Canada
USSA-5 PCB GB
Hi Fab

Is the USSA5 pcb able to accommodate either the USSA5 or 3 or does the USSA3 requires a different pcb ?

Thanks
Eric
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Old 23rd June 2018, 02:56 PM   #29
fab is offline fab  Canada
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Location: Canada
USSA-5 PCB GB
Hi Eric
Yes same pcb for both versions.
Fab
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Old 23rd June 2018, 03:23 PM   #30
Project16 is offline Project16  France
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Join Date: Nov 2012
Location: Cognac
Quote:
Originally Posted by fab View Post
Meanman64,
Not that much. The black pcb was made a little bit smaller than previous version in order to fit within 100mm max length and get special price. However, when you select 2oz copper or non other basic parameter you do not get the rebate. The rebate is good for 1st prototyping exercice when you experiment. It was also done to adjust for easier fit on heatsink.

The changes from red to black:
1- different pcb size so the mounting holes are now perfectly aligned within 2 fins of heatsink (if you drill completely the holes before tapping). Red pcb still fit but closer to fins so more precision is needed.
2- input transistors in closer proximity to prevent having to bend the leads for thermal contact (thermal contact is more important for the USSA-3 with jfet inputs and not mandatory for ussa-5).
3- gate resistor for M2 closer to gate (although no problem has been experienced with red color Pcb)
4- removal of one unused cap
5- 2 mores holes for the USSA-3 to add components to adjust 2nd harmonic level
6- black colour Pcb

There may be a few other things and Project16 would know.

But in general the red pcb really fit for the purpose and both my USSA-3 and -5 are built with it

Fab
No, nothing more except the possibility of putting a input apacitor more bulky.
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