Mine have exhibited the same problems, even cased. I'll try your suggestion and report back. I also had a strange high frequency oscillation as well in the low voltage version that I haven't tracked down.
thanks for the tip Andrew, i'll give that a shot in the next few days, I do prefer your idea of all negative reg layout though, as seems easier to convert that way while still using cheaper and more available devices.
cheaper and easier to find parts is my favorite
+1, but I do think that to keep this clear that perhaps it might be better if someone with better written english language skills did (or at least checked) this. no offense to Q H here, English isnt his first language
this is great info again AndrewT, especially as i'm just about to build a couple low Vout regs at 3v3, 1v8 and 250ma
x2 here, this would be fantastic!, this is what I love about Peranders superreg, t has alternate mappings for all refs and a couple different packages. I also I have about 300 3mm green LEDs. for now i'll just knock up a little perfboard 'patch'
I'm sorry but this went on for too long and changed way too many times for me to keep track. Also, last time I saw the price of the set, I couldn't really afford to pay for the boards I want anymore, so I'll remove myself from the list for now.
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Royalbee - 2 set
5 - h-wan - 3 set
6 - rothay - 3 set
7 - ben-jam-in-3 set
8 - Superluca71 - 2 set
9 - suburra - 2 set
10 - Joshua_G – 2 set
11 - dbratny - 4 sets
12 - rpeter - 3 sets
13 -Sunsun22: 2sets
14 - Sergelisses: 1 set
15 - Studiostevus: 2 sets (shipping after 15 january)
16 - qusp: 4 sets
17 - Kuka: 2 sets
18 - Ferrari: 4 sets
19 - cerfer: 2 sets
20 - leejh: 2 sets
21 - drspence: 2 sets
22 - albrerta: 1 set
23 - Bernie: 1 set
24 - Chul: 2 sets
25 - 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)
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - Komigenie - 2 set
3 - pop music - 2 set
4 - Royalbee - 2 set
5 - h-wan - 3 set
6 - rothay - 3 set
7 - ben-jam-in-3 set
8 - Superluca71 - 2 set
9 - suburra - 2 set
10 - Joshua_G – 2 set
11 - dbratny - 4 sets
12 - rpeter - 3 sets
13 -Sunsun22: 2sets
14 - Sergelisses: 1 set
15 - Studiostevus: 2 sets (shipping after 15 january)
16 - qusp: 4 sets
17 - Kuka: 2 sets
18 - Ferrari: 4 sets
19 - cerfer: 2 sets
20 - leejh: 2 sets
21 - drspence: 2 sets
22 - albrerta: 1 set
23 - Bernie: 1 set
24 - Chul: 2 sets
25 - 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 can't see the sense traces to monitor the output voltage.
You must change Vref to a minimum of 3 components: LED + Zener + resistor and if room an extra LED or optional VR.
All the jFET (sk170) locations could be changed to 4pad from the existing 3pad.
The alternative gate pads would connect to the opposite side drain/source pads. This simple one extra pad avoids the need to modify the jFET if converting polarity of the PSU. And requires no extra PCB space !!!
I like the new smaller size, 41 by 110 is more manageable.
You must change Vref to a minimum of 3 components: LED + Zener + resistor and if room an extra LED or optional VR.
All the jFET (sk170) locations could be changed to 4pad from the existing 3pad.
The alternative gate pads would connect to the opposite side drain/source pads. This simple one extra pad avoids the need to modify the jFET if converting polarity of the PSU. And requires no extra PCB space !!!
I like the new smaller size, 41 by 110 is more manageable.
Last edited:
Back in the days of this reg's development I have wrote in its own thread and in the phono's thread maybe, that the Vref regarding noise and drift is open to choice. I regard it as a sub-circuit with its own spec goals. There was a PCB artwork design we recommended (from an Australian member) that had a connector for a sub-board even. There were Zener (early phono), Leds (Hypno, Mez) also. The pros of the Norton variable ref are low and benign noise, easily filtered, and simplicity/cost. Good sonics for just a Jfet and a resistor also if someone trusts anecdotal experience. Some client applications are not sensitive in drift and settling time due to tempco(s) for their bias, some are demanding. Up to 10V-15V, Leds are a good and cheap solution, I also prefer them subjectively between other simple active VRef for that range, that is why I used them in DCB1s. Common Zeners are aggressive for pink like noise and unreliable between samples, also need high Idss to be 'grabbed' well, I have even seen near DC cyclic ups and downs if not. I would recommend LM329 but its almost single vendor, scarce and expensive these days especially for non Americans. $10 each even on Ebay. An agreable solution for good Tc would be a TL431 best run at about 1mA from a degenerated Idss source, variable with a trimmer up to 36V and shunted by a 1000uF very low ESR cap, because its noise will be much higher than an LM329 or Leds. As for simple Norton, 1W low ppm resistors (eg Dale) are helping for substituting the multiturn which is high ppm and has tiny wiper that runs not very cool. It all depends on judging the application or how exact someone wants to reach, the simple Norton proved not giving real practical problems to many users as far as I have gathered up to now and lends nice tonality non the less. Anyway that was just a short sum up of my experience with various Vrefs in this type of reg and its variations, I trust that the most demanding and experienced amongst you will find what suits you best. Happy new year to all!
Dear Quanghao
Did you consider that lay-out proposal (#226) , when you decided to make your own layout?
http://www.diyaudio.com/forums/powe...tic-salas-low-voltage-shunt-regulator-23.html
where has the sense gone? I concur with all AndrewT's suggestions with the jfet pads, which we have been talking about quite a bit and many agree. as I mentioned I would love to see optional TO220 pads for the diodes, takes up no extra space and means I can stop bending them to fit. of course sense lines can be hacked in by the end user, but its not ideal, I would love to see connections for AMC coax connectors there for the sense lines personally; a man can dream.
I remove my self too ...
Please Update the list yourselves when you type here:
1 - TFAN69 - 1set
2 - pop music - 2 set
3 - Royalbee - 2 set
4 - h-wan - 3 set
5 - rothay - 3 set
6 - ben-jam-in-3 set
7 - Superluca71 - 2 set
8 - suburra - 2 set
9 - Joshua_G – 2 set
10 - dbratny - 4 sets
11 - rpeter - 3 sets
12 -Sunsun22: 2sets
13 - Sergelisses: 1 set
14 - Studiostevus: 2 sets (shipping after 15 january)
15 - qusp: 4 sets
16 - Kuka: 2 sets
17 - Ferrari: 4 sets
18 - cerfer: 2 sets
19 - leejh: 2 sets
20 - drspence: 2 sets
21 - albrerta: 1 set
22 - Bernie: 1 set
23 - Chul: 2 sets
24 - dggs: 2 sets
25 - luvdunhill: 1 set
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 - pop music - 2 set
3 - Royalbee - 2 set
4 - h-wan - 3 set
5 - rothay - 3 set
6 - ben-jam-in-3 set
7 - Superluca71 - 2 set
8 - suburra - 2 set
9 - Joshua_G – 2 set
10 - dbratny - 4 sets
11 - rpeter - 3 sets
12 -Sunsun22: 2sets
13 - Sergelisses: 1 set
14 - Studiostevus: 2 sets (shipping after 15 january)
15 - qusp: 4 sets
16 - Kuka: 2 sets
17 - Ferrari: 4 sets
18 - cerfer: 2 sets
19 - leejh: 2 sets
20 - drspence: 2 sets
21 - albrerta: 1 set
22 - Bernie: 1 set
23 - Chul: 2 sets
24 - dggs: 2 sets
25 - luvdunhill: 1 set
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 hesitated to write something about this, but I felt like getting some more opinions..
I ordered 2 of the previous boards from QH, and I had a look at my paypal payment for these: it was 34$ for 2! boards. So I am wondering why nobody is wondering about this...
Price has doubled, and for me this seems to be not a group buy, but more of a normal business with the goal of making profit.
I cannot imagine a small PCB from Vietnam being more than 25$.
Am I wrong? Is this a real price?
I think that GBs are a wonderful way to come to very nice projects, and it is important to stay NOT COMMERCIAL in this thread, for many reasons. One would be, for example, to protect professional vendors, who pay taxes, give warranties, provide clear instructions, put a lot of time and effort in their products, which makes them more expensive of course.
In this case it is Salas wonderful design, members are asked to contribute to the project with their knowledge, to get rid of some bugs and provide variability; so this is a pure diy project, which is based to a big extend on trust.
And trust is exactly what I missing right now...So I do not order boards, and maybe I am not the only one who is thinking that way.
And, once more, maybe I am totally wrong, and this is the real cost, and i am just a suspicious nerd. In this case I apologize deeply to QH in advance, that I couldn't keep my mouth shut.
Cheers,
Juergen
I ordered 2 of the previous boards from QH, and I had a look at my paypal payment for these: it was 34$ for 2! boards. So I am wondering why nobody is wondering about this...
Price has doubled, and for me this seems to be not a group buy, but more of a normal business with the goal of making profit.
I cannot imagine a small PCB from Vietnam being more than 25$.
Am I wrong? Is this a real price?
I think that GBs are a wonderful way to come to very nice projects, and it is important to stay NOT COMMERCIAL in this thread, for many reasons. One would be, for example, to protect professional vendors, who pay taxes, give warranties, provide clear instructions, put a lot of time and effort in their products, which makes them more expensive of course.
In this case it is Salas wonderful design, members are asked to contribute to the project with their knowledge, to get rid of some bugs and provide variability; so this is a pure diy project, which is based to a big extend on trust.
And trust is exactly what I missing right now...So I do not order boards, and maybe I am not the only one who is thinking that way.
And, once more, maybe I am totally wrong, and this is the real cost, and i am just a suspicious nerd. In this case I apologize deeply to QH in advance, that I couldn't keep my mouth shut.
Cheers,
Juergen
Our thread title includes "Group-design".
What do we need?
Can one universal PCB satisfy the majority?
Where would we like the power FETs located?
along the edge of the PCB
or
in the middle of the PCB
or
?? some other places??
Do we want a universal PCB? All voltages <60Vinput(40Vac)? Convertible to either polarity?
We can take the best of features already posted and combine them into "our" version of a Salas type Shunt Reg.
What do we need?
Can one universal PCB satisfy the majority?
Where would we like the power FETs located?
along the edge of the PCB
or
in the middle of the PCB
or
?? some other places??
Do we want a universal PCB? All voltages <60Vinput(40Vac)? Convertible to either polarity?
We can take the best of features already posted and combine them into "our" version of a Salas type Shunt Reg.
Hi All!,
Last buy QH said he lost money,alot of people want shipping tracking,gold plating rose also,several people didn't get their boards,so those will hopefully be made up out of the second buy,I did get my 2 I ordered but my name went on and off the list so I crossed my fingers about dilervery MAYBE it's time for someone to design a different setup with a BOM and maybe ONE post to set it up and use it,
NOT throwing any rocks here,Group buys are good when they run smooth,but when not It's alot to handle.............
Last buy QH said he lost money,alot of people want shipping tracking,gold plating rose also,several people didn't get their boards,so those will hopefully be made up out of the second buy,I did get my 2 I ordered but my name went on and off the list so I crossed my fingers about dilervery MAYBE it's time for someone to design a different setup with a BOM and maybe ONE post to set it up and use it,
NOT throwing any rocks here,Group buys are good when they run smooth,but when not It's alot to handle.............
This was the original deal. Substantially different than the current one.
One question on behalf of the 5 individuals who didn't receive their boards, if shipment was via registered mail as suggested above why can't the missing packages be tracked ?
That said perhaps a breakdown of the price is in order. I assume the cost of the missing boards is being spread over the new orders. That would account for about a 10 % increase. It was mentioned that the gold was more expensive so that is a little. Perhaps the shipping will be insured this time. Still all of this added to a $16 board (3 or more price) isn't a 2x increase is it?
Lastly why is the board layout being changed in ways clearly detrimental such as the missing sense lines? Smaller boards are less expensive not more. I don't want to scare people off of this project but I do think we need to revisit the design. Some very good and valuable suggestions have been made by some very knowledgeable members. I would like to see these ideas incorporated. Perhaps those who have made suggestions should sign off on any design before we jump into the ordering stage. I also remind people of some of the shipping suggestions like an insured drop shipment to north america for distribution. Potentially no more expensive, certainly more reliable delivery. Others thoughts?
I think more transparency may help to solve the issues that have come up:
I think most of us don't like to deal with things like shipping etcetera, myself included.
So a 50 % higher price price (or maybe a fixed fee) for each PCB then actual cost in case of a high quantity GB would still be good for all individual buyers. Of course shipping cost plus Paypal fee needs to be added as well.
For a private project I am about two order 10 double sided (silkscreen also double sided) PCB's of 16 x 16 cm and the price is very accetable I can assure you.....
just my 2 cents
I can use 2 sets of boards...
Regards,
Jan
I think most of us don't like to deal with things like shipping etcetera, myself included.
So a 50 % higher price price (or maybe a fixed fee) for each PCB then actual cost in case of a high quantity GB would still be good for all individual buyers. Of course shipping cost plus Paypal fee needs to be added as well.
For a private project I am about two order 10 double sided (silkscreen also double sided) PCB's of 16 x 16 cm and the price is very accetable I can assure you.....
just my 2 cents
I can use 2 sets of boards...
Regards,
Jan
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