Hi
My friend designed two regulator with very small size. He is willing to offer PCB sample to member on diyaudio forum.
Dual regulator : SIZE: 82mm X 59mm
Positive regulator : SIZE: 65mm X 41mm
Supply voltage range : 5V -- 80V
here are the pics of the regulators:
dual
positive
This is the PCB:
dual
positive
Schematic:
dual
positive
The mounting on chassis:
each member from DIYAUDIO can ask for one sample PCB(dual or positive). Because the different voltage has different BOM, please tell me output voltage you need. Only 20pcs of samples for each reg.
Applyer only pays the registered airmail shipping fee 3.00USD.
My email address: coffin@diyzone.net
cheers
Coffin
My friend designed two regulator with very small size. He is willing to offer PCB sample to member on diyaudio forum.
Dual regulator : SIZE: 82mm X 59mm
Positive regulator : SIZE: 65mm X 41mm
Supply voltage range : 5V -- 80V
here are the pics of the regulators:
dual
positive
This is the PCB:
dual
positive
Schematic:
dual
positive
The mounting on chassis:
each member from DIYAUDIO can ask for one sample PCB(dual or positive). Because the different voltage has different BOM, please tell me output voltage you need. Only 20pcs of samples for each reg.
Applyer only pays the registered airmail shipping fee 3.00USD.
My email address: coffin@diyzone.net
cheers
Coffin
Hi
Sorry for my English. Is that called "bolt"? in Taiwan we call it "hat for screw" or "female screw"......
No offend to any female.....
And had been revised.....
cheers
coffin
Sorry for my English. Is that called "bolt"? in Taiwan we call it "hat for screw" or "female screw"......
No offend to any female.....
And had been revised.....
cheers
coffin
Hi Coffin,
PCB must be very cheap - you waste so much area by lying down RB caps?
How is performance of these regs?
Cheers,
greg
PCB must be very cheap - you waste so much area by lying down RB caps?
How is performance of these regs?
Cheers,
greg
amplifierguru said:
Yeah, I was getting a bit excited, sorry, I'm not interested in nuts. 😉
hey Coffin,
I was only having a little joke, it is perfectly clear that a female screw is a nut. Sorry, I should have been a little more respectful.
Hi
The performance of the PCB is pretty good!
Very low noise, low impedance.
The sound is very neutral and transparent.
Actually, the dual mini reg PCB now is the second version(the first version is color green, 2nd is purple), it sells very hot in Taiwan and HongKong.
cheers
Coffin
The performance of the PCB is pretty good!
Very low noise, low impedance.
The sound is very neutral and transparent.
Actually, the dual mini reg PCB now is the second version(the first version is color green, 2nd is purple), it sells very hot in Taiwan and HongKong.
cheers
Coffin
Hi
the english instruction and BOM are on!
http://circulator.bravehost.com/minireg.htm
cheers
Coffin
the english instruction and BOM are on!
http://circulator.bravehost.com/minireg.htm
cheers
Coffin
HI
I forgot to add Paypal fee(yes, paypal me the shipping fee) ........
So the postage is 3.5 USD.
sorry for the correction
cheers
Coffin
I forgot to add Paypal fee(yes, paypal me the shipping fee)
........So the postage is 3.5 USD.
sorry for the correction
cheers
Coffin
Hi
More SamplePCBs are sending out today.
Still limited samples are available......
cheers
Coffin
More SamplePCBs are sending out today.
Still limited samples are available......
cheers
Coffin
I have examined the pcb's and so far I'll notice this:
The vias are pretty small. I'll think the inductance will be a but less with bigger holes, may not be critical here
Power traces are a bit thin because there are not short circuit protection.
The C9, C10 should be in place I'll think but C10 and C19 are totally unnecessary. The regulator will most likely oscillate.
The pcb has a whole groundplane and I'll think it would be wise to at least make some "ditches" to lead currents away from the opamp and the other sensitive parts.
The fastest opamp in the partslist is OPA637 and I don't know if fast won't work, like the AD825, but it might.
Despite my remarks, excellent looking pcb's.
, the same quality feeling as my pcb's 
The vias are pretty small. I'll think the inductance will be a but less with bigger holes, may not be critical here
Power traces are a bit thin because there are not short circuit protection.
The C9, C10 should be in place I'll think but C10 and C19 are totally unnecessary. The regulator will most likely oscillate.
The pcb has a whole groundplane and I'll think it would be wise to at least make some "ditches" to lead currents away from the opamp and the other sensitive parts.
The fastest opamp in the partslist is OPA637 and I don't know if fast won't work, like the AD825, but it might.
Despite my remarks, excellent looking pcb's.
, the same quality feeling as my pcb's Member
Joined 2002
Any price on what you will charge for a board ?
Im interested in the board that will do both rail's on a single board.. the purple one 😀
Im interested in the board that will do both rail's on a single board.. the purple one 😀
I ment C19 and C20 are not necessary.peranders said:
The pcb's are really small, smallest so far but the price for this is standing parts and SMD parts on the solderside, not so productionfriendly.
jleaman, if you look here you'll see my complete dual supply super unit with transformer and everything.
Op-amps supplied directly from output regulated voltage?
Q4/Q14 surely not swaped.
I don't get it.
Q4/Q14 surely not swaped.
I don't get it.
This may be a problem or not. It depends on the pcb and used opampsdarkfenriz said:
It's correct, just check Jung's/Didden's articles.darkfenriz said:
Q4 is an emitter follower from the opamp if you don't realize it.