Chul I do for you
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Ed LaFontaine - 2 set
12- Joshua_G – 2 set
13 - dbratny - 4 sets
14 - rpeter - 3 sets
15 -Sunsun22: 2sets
16 - Sergelisses: 1 set
17 - Studiostevus: 2 sets (shipping after 15 january)
18 - qusp: 4 sets
19 - Kuka: 2 sets
20 - Ferrari: 4 sets
21 - cerfer: 2 sets
22 - leejh: 2 sets
23 - drspence: 2 sets
24 - albrerta: 1 set
25 - Bernie: 1 set
26 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Ed LaFontaine - 2 set
12- Joshua_G – 2 set
13 - dbratny - 4 sets
14 - rpeter - 3 sets
15 -Sunsun22: 2sets
16 - Sergelisses: 1 set
17 - Studiostevus: 2 sets (shipping after 15 january)
18 - qusp: 4 sets
19 - Kuka: 2 sets
20 - Ferrari: 4 sets
21 - cerfer: 2 sets
22 - leejh: 2 sets
23 - drspence: 2 sets
24 - albrerta: 1 set
25 - Bernie: 1 set
26 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
removed from list
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - xxx
12- Joshua_G – 2 set
13 - dbratny - 4 sets
14 - rpeter - 3 sets
15 -Sunsun22: 2sets
16 - Sergelisses: 1 set
17 - Studiostevus: 2 sets (shipping after 15 january)
18 - qusp: 4 sets
19 - Kuka: 2 sets
20 - Ferrari: 4 sets
21 - cerfer: 2 sets
22 - leejh: 2 sets
23 - drspence: 2 sets
24 - albrerta: 1 set
25 - Bernie: 1 set
26 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - xxx
12- Joshua_G – 2 set
13 - dbratny - 4 sets
14 - rpeter - 3 sets
15 -Sunsun22: 2sets
16 - Sergelisses: 1 set
17 - Studiostevus: 2 sets (shipping after 15 january)
18 - qusp: 4 sets
19 - Kuka: 2 sets
20 - Ferrari: 4 sets
21 - cerfer: 2 sets
22 - leejh: 2 sets
23 - drspence: 2 sets
24 - albrerta: 1 set
25 - Bernie: 1 set
26 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Joshua_G – 2 set
12 - dbratny - 4 sets
13 - rpeter - 3 sets
14 -Sunsun22: 2sets
15 - Sergelisses: 1 set
16 - Studiostevus: 2 sets (shipping after 15 january)
17 - qusp: 4 sets
18 - Kuka: 2 sets
19 - Ferrari: 4 sets
20 - cerfer: 2 sets
21 - leejh: 2 sets
22 - drspence: 2 sets
23 - albrerta: 1 set
24 - Bernie: 1 set
25 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Joshua_G – 2 set
12 - dbratny - 4 sets
13 - rpeter - 3 sets
14 -Sunsun22: 2sets
15 - Sergelisses: 1 set
16 - Studiostevus: 2 sets (shipping after 15 january)
17 - qusp: 4 sets
18 - Kuka: 2 sets
19 - Ferrari: 4 sets
20 - cerfer: 2 sets
21 - leejh: 2 sets
22 - drspence: 2 sets
23 - albrerta: 1 set
24 - Bernie: 1 set
25 - Chul: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
Can someone please confirm what this GB is for?
GB1 was for 4 boards on one PCB; layout from Post 194?
Then, GB2 started and the last layout that I saw was from Post 550 which is missing the low voltage board (now only 3 boards).
When EdLafonaine asked about why there were only three boards, quanghao said (post 552):
Quanghao, can you please post the final layout of the boards that are going for printing so that there is no confusion?
Are you simply re-using the layout from GB1 or are you offering your newer, shorter PCB from post 550 that does not include the low voltage board?
Cheers,
Dave.
GB1 was for 4 boards on one PCB; layout from Post 194?
Then, GB2 started and the last layout that I saw was from Post 550 which is missing the low voltage board (now only 3 boards).
When EdLafonaine asked about why there were only three boards, quanghao said (post 552):
Quanghao, can you please post the final layout of the boards that are going for printing so that there is no confusion?
Are you simply re-using the layout from GB1 or are you offering your newer, shorter PCB from post 550 that does not include the low voltage board?
Cheers,
Dave.
Also, can I recommend that we wikify this GB? The whole thing with the "Please Update the list yourselves when you type here:" just makes for a massive thread that no only sucks to read through but is also very error prone.
I'll be happy to create the wiki page if that's the way you want to go... I just need the final BOM (post 400) and pictures of the final layout.
I'll be happy to create the wiki page if that's the way you want to go... I just need the final BOM (post 400) and pictures of the final layout.
Hi guanghao,
Thanks but that doesn't answer my question. Are you saying that the layout from post 550 (aka GB2) will just have one more pcb added to the right?
Also, the layout from Post 194 (aka GB1) is very different from the one in post 550 (aka GB2).
For instance, GB2 is missing C1 & C2. GB1 also had a completely different layout for the low voltage circuit (specifically, the addition of parts R2-R4, C6 and the removal of parts R5, L1-L3). Also, the newer layout is missing parts R18, C1-C4.
So the way that I read this newer layout is it is less flexible (leaves less room for fine tuning) than the first board. Perhaps I am reading it wrong?
Anyawys, that is why I asked you to post an image of the final layout.. so that I (and other people) know exactly what is going to the manufacturer. The image that you reposted does not do that and before I sign up for a group buy, I really do want to know exactly what I'm buying.
Thanks in advance,
Dave.
Thanks but that doesn't answer my question. Are you saying that the layout from post 550 (aka GB2) will just have one more pcb added to the right?
Also, the layout from Post 194 (aka GB1) is very different from the one in post 550 (aka GB2).
For instance, GB2 is missing C1 & C2. GB1 also had a completely different layout for the low voltage circuit (specifically, the addition of parts R2-R4, C6 and the removal of parts R5, L1-L3). Also, the newer layout is missing parts R18, C1-C4.
So the way that I read this newer layout is it is less flexible (leaves less room for fine tuning) than the first board. Perhaps I am reading it wrong?
Anyawys, that is why I asked you to post an image of the final layout.. so that I (and other people) know exactly what is going to the manufacturer. The image that you reposted does not do that and before I sign up for a group buy, I really do want to know exactly what I'm buying.
Thanks in advance,
Dave.
so nobody else was keen on AndrewT's idea of having all 'negative' regulators, which use more available and cheaper parts and can more easily be changed to positive or bipolar sets? I thought this was a very good idea
Qusp,
you can convert the +ve regs to -ve by using the -ve BOM components.
Take care to swap the semis around so that they face the correct polarity.
The jFETs used as CCS can have the middle, gate leg bent across and soldered to the source leg, the two legged device now fits the two outer pads of the sk170 location.
I have already tested this. It works.
you can convert the +ve regs to -ve by using the -ve BOM components.
Take care to swap the semis around so that they face the correct polarity.
The jFETs used as CCS can have the middle, gate leg bent across and soldered to the source leg, the two legged device now fits the two outer pads of the sk170 location.
I have already tested this. It works.
I have had to order up Pchannel devices to create +ve regs for a customer. What a waste of money !
Thanks. As far as I can see, all regulators can be either positive ones, or negative ones and positive regulator can be served also as a negative one and vise versa. Is that correct?
yes,
both can be converted to the other polarity, if you are very careful to use the correct BOM and reverse or not the semiconductors. Plus the CCS jFET mod.
These markings & pads could all be accommodated on the PCB to help avoid confusion, if the instructions were clearly written for "normal -ve" and for "converted +ve"
both can be converted to the other polarity, if you are very careful to use the correct BOM and reverse or not the semiconductors. Plus the CCS jFET mod.
These markings & pads could all be accommodated on the PCB to help avoid confusion, if the instructions were clearly written for "normal -ve" and for "converted +ve"
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Joshua_G – 2 set
12 - dbratny - 4 sets
13 - rpeter - 3 sets
14 -Sunsun22: 2sets
15 - Sergelisses: 1 set
16 - Studiostevus: 2 sets (shipping after 15 january)
17 - qusp: 4 sets
18 - Kuka: 2 sets
19 - Ferrari: 4 sets
20 - cerfer: 2 sets
21 - leejh: 2 sets
22 - drspence: 2 sets
23 - albrerta: 1 set
24 - Bernie: 1 set
25 - Chul: 2 sets
26 - dggs: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Atilla - 2 set
5 - Royalbee - 2 set
6 - h-wan - 3 set
7 - rothay - 3 set
8 - ben-jam-in-3 set
9 - Superluca71 - 2 set
10 - suburra - 2 set
11 - Joshua_G – 2 set
12 - dbratny - 4 sets
13 - rpeter - 3 sets
14 -Sunsun22: 2sets
15 - Sergelisses: 1 set
16 - Studiostevus: 2 sets (shipping after 15 january)
17 - qusp: 4 sets
18 - Kuka: 2 sets
19 - Ferrari: 4 sets
20 - cerfer: 2 sets
21 - leejh: 2 sets
22 - drspence: 2 sets
23 - albrerta: 1 set
24 - Bernie: 1 set
25 - Chul: 2 sets
26 - dggs: 2 sets
And ,
Please Update the list not get last PCB:
1. stephen1212 (ordered 10 received 0 need 4 sets )
2. fitzfish (received 1 set, still need remaining 3 sets)
3. ramallo
4. claudio
5. kp93300 ( 2sets)
I'm in favor of Andrew's terrific idea! Maybe quanghao can reconsider his approach when you're redoing/reizing the layout?
Last edited:
I have been testing a few low voltage versions of Quanghao's Salas reg.
all between 5V and 9V
I am finding that the resistor setting Vref is not holding a stable voltage due to variations in current through the CCS. It varies with input voltage and it varies with warm up.
I have not tried using them cased up, so don't know how well they hold voltage with changes in ambient temperature.
some of the semiconductors have a small -ve temp coeff. Some have a small +ve temp coeff. The CCS (Q3// to BJT) is very sensitive to temperature.
selecting different Idss reduces the sensitivity to temperature. But it far from good.
Replacing the Vref resistor with LEDs and/or diodes and/or Zener provides a much better Vref.
I have modified 4PCBs to incorporate 2 to 4 LEDs + low value VR (100r).
This holds voltage much better. It saves running out of jFETs with Idss 6.3mA to 7.5mA
I have a couple of PCBs that are hotrodded to 830mA and these are poor at holding the output voltage when this hot. They were very good at 162mA and 325mA <-0.01%output per Volt of variation at input. These are 8.4V with 4LEDs and 0r0 using 8.1mA Idss for Q3. I am still looking at what can be done to improve the hotrodded versions. I think I will compare to a resistor Vref to see how this behaves hotrodded.
The 830mA varies from 8.395V (at 20V input) to 8.484V (at 15V input). The input is from a regulated Lab Supply. Yes, a neg Volt coeff of -0.2% per volt
Many moons ago I suggested that Vref should allow locations for a LED + Zener + VR. I now request that this is a minimum requirement for a SALAS Vref.
Quanghao.
On your PCBs there is sufficient room where VR & L4 fit to place 4 3mmdiam LEDs and a resistor. It does not waste any more space but gives significant performance improvement.
all between 5V and 9V
I am finding that the resistor setting Vref is not holding a stable voltage due to variations in current through the CCS. It varies with input voltage and it varies with warm up.
I have not tried using them cased up, so don't know how well they hold voltage with changes in ambient temperature.
some of the semiconductors have a small -ve temp coeff. Some have a small +ve temp coeff. The CCS (Q3// to BJT) is very sensitive to temperature.
selecting different Idss reduces the sensitivity to temperature. But it far from good.
Replacing the Vref resistor with LEDs and/or diodes and/or Zener provides a much better Vref.
I have modified 4PCBs to incorporate 2 to 4 LEDs + low value VR (100r).
This holds voltage much better. It saves running out of jFETs with Idss 6.3mA to 7.5mA
I have a couple of PCBs that are hotrodded to 830mA and these are poor at holding the output voltage when this hot. They were very good at 162mA and 325mA <-0.01%output per Volt of variation at input. These are 8.4V with 4LEDs and 0r0 using 8.1mA Idss for Q3. I am still looking at what can be done to improve the hotrodded versions. I think I will compare to a resistor Vref to see how this behaves hotrodded.
The 830mA varies from 8.395V (at 20V input) to 8.484V (at 15V input). The input is from a regulated Lab Supply. Yes, a neg Volt coeff of -0.2% per volt
Many moons ago I suggested that Vref should allow locations for a LED + Zener + VR. I now request that this is a minimum requirement for a SALAS Vref.
Quanghao.
On your PCBs there is sufficient room where VR & L4 fit to place 4 3mmdiam LEDs and a resistor. It does not waste any more space but gives significant performance improvement.
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