Dual tracking power supply

T

Trevor Wilson

Guest
I have need of a dual tracking power supply (my ancient, DIY effort has
finally decided to die). I note that prices for such things are quite
reasonable nowadays and hardly demand the effort DIY. Any thoughts?

I looked at this:

http://www.rigolna.com/products/dc-power-supplies/dp800/dp832/

and, whilst very impressive, it's more money than I care to spend and I
really don't need the features/performance offered. Still, I like my
Rigol 1054Z. It would look nice beside it.

Then again, an earlier thread alerted me to this seller and his product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.

--
Trevor Wilson
www.rageaudio.com.au

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Trevor Wilson wrote:

I have need of a dual tracking power supply (my ancient, DIY effort has
finally decided to die). I note that prices for such things are quite
reasonable nowadays and hardly demand the effort DIY. Any thoughts?

I looked at this:

http://www.rigolna.com/products/dc-power-supplies/dp800/dp832/

and, whilst very impressive, it's more money than I care to spend and I
really don't need the features/performance offered. Still, I like my
Rigol 1054Z. It would look nice beside it.

Then again, an earlier thread alerted me to this seller and his product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.
Click to expand...

** My idea of a "dual tracking" PSU is when a single knob varies both the negative and positive outputs in identical fashion.

The Rigol may well do that but are you sure about the other two ?

The blurbs only says the two outputs track in parallel mode.


.... Phil
 
On 8/06/2015 3:01 PM, Phil Allison wrote:
Trevor Wilson wrote:

I have need of a dual tracking power supply (my ancient, DIY effort
has finally decided to die). I note that prices for such things are
quite reasonable nowadays and hardly demand the effort DIY. Any
thoughts?

I looked at this:

http://www.rigolna.com/products/dc-power-supplies/dp800/dp832/

and, whilst very impressive, it's more money than I care to spend
and I really don't need the features/performance offered. Still, I
like my Rigol 1054Z. It would look nice beside it.

Then again, an earlier thread alerted me to this seller and his
product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT



And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT



Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.


** My idea of a "dual tracking" PSU is when a single knob varies both
the negative and positive outputs in identical fashion.

The Rigol may well do that but are you sure about the other two ?

The blurbs only says the two outputs track in parallel mode.


... Phil
Click to expand...

**Yeah, it's a bit confusing. I'll call the guy tomorrow. I hope he
speak English. :)


--
Trevor Wilson
www.rageaudio.com.au

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Trevor Wilson <trevor@spamblockrageaudio.com.au> wrote:
Then again, an earlier thread alerted me to this seller and his product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.
Click to expand...

I can't see anything on the Ebay power supplies to say that they can
output negative voltage. Both say 0-30V, not 30-0-30. I think I've
seen better deals for 0-30V dual power supplies.

There also doesn't seem to be any reference in the specs or description
about them actually being linear either, just the word in the titles and
pictures. Given the context, I'd also be very skeptical about that.
Assuming you want to avoid switch-mode of course.

The interfaces can be poor as well (it's amazing what they can mess up),
see this review/teardown/improvement of a cheap single bench PSU by Mike
Harrison (Mike's Electric Stuff) from a few years back:
http://www.youtube.com/watch?v=6LEN_HNFK40

--
__ __
#_ < |\| |< _#
 
Computer Nerd Kev wrote:

I can't see anything on the Ebay power supplies to say that they can
output negative voltage. Both say 0-30V, not 30-0-30.
Click to expand...

** Both PSUs have series, independent and parallel modes.

Series gives you +/-30 if you treat the common as ground.



There also doesn't seem to be any reference in the specs or description
about them actually being linear either, just the word in the titles and
pictures.
Click to expand...

** The weight is a big clue (13.1 and 9.5kgs) plus the size too.

SMPS would be much smaller and lighter.

Its safe bet they are both linear.


..... Phil
 
On 8/06/2015 3:01 PM, Phil Allison wrote:
Trevor Wilson wrote:

I have need of a dual tracking power supply (my ancient, DIY effort
has finally decided to die). I note that prices for such things are
quite reasonable nowadays and hardly demand the effort DIY. Any
thoughts?

I looked at this:

http://www.rigolna.com/products/dc-power-supplies/dp800/dp832/

and, whilst very impressive, it's more money than I care to spend
and I really don't need the features/performance offered. Still, I
like my Rigol 1054Z. It would look nice beside it.

Then again, an earlier thread alerted me to this seller and his
product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT



And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT



Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.


** My idea of a "dual tracking" PSU is when a single knob varies both
the negative and positive outputs in identical fashion.

The Rigol may well do that but are you sure about the other two ?

The blurbs only says the two outputs track in parallel mode.
Click to expand...

**The seller sent me an email indicating that all his models (3) are
dual tracking types. I try to get some kind of money-back guarantee
relating to this.



--
Trevor Wilson
www.rageaudio.com.au

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On 9/06/2015 8:36 AM, Computer Nerd Kev wrote:
Trevor Wilson <trevor@spamblockrageaudio.com.au> wrote:

Then again, an earlier thread alerted me to this seller and his product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.

I can't see anything on the Ebay power supplies to say that they can
output negative voltage. Both say 0-30V, not 30-0-30. I think I've
seen better deals for 0-30V dual power supplies.

There also doesn't seem to be any reference in the specs or description
about them actually being linear either, just the word in the titles and
pictures. Given the context, I'd also be very skeptical about that.
Assuming you want to avoid switch-mode of course.

The interfaces can be poor as well (it's amazing what they can mess up),
see this review/teardown/improvement of a cheap single bench PSU by Mike
Harrison (Mike's Electric Stuff) from a few years back:
http://www.youtube.com/watch?v=6LEN_HNFK40
Click to expand...

**Thanks for the link. Interesting. I didn't think of Tenma and, most
importantly, I didn't think of RS. I checked the RS site and their
prices are very competitive. I'd rather source my product from them,
because I trust their systems and back-up. Here's one from the RS stable:

http://au.element14.com/tenma/72-10500/power-supply-2ch-30v-3a-adjustable/dp/225194801

I'd prefer linear, due to serviceability, but I am also aware that SMPS
is more likely given the cost constraints.

--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
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On 9/06/2015 11:00 AM, Trevor Wilson wrote:
On 9/06/2015 8:36 AM, Computer Nerd Kev wrote:
Trevor Wilson <trevor@spamblockrageaudio.com.au> wrote:

Then again, an earlier thread alerted me to this seller and his product:

http://www.ebay.com.au/itm/131304464170?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


And this:

http://www.ebay.com.au/itm/271530861812?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


Thoughts on quality would be appreciated.

40-0-40 @ 5 Amps would be ideal, but 30-0-30 @ 3 Amps will likely
suffice for 99% of the time.

I can't see anything on the Ebay power supplies to say that they can
output negative voltage. Both say 0-30V, not 30-0-30. I think I've
seen better deals for 0-30V dual power supplies.

There also doesn't seem to be any reference in the specs or description
about them actually being linear either, just the word in the titles and
pictures. Given the context, I'd also be very skeptical about that.
Assuming you want to avoid switch-mode of course.

The interfaces can be poor as well (it's amazing what they can mess up),
see this review/teardown/improvement of a cheap single bench PSU by Mike
Harrison (Mike's Electric Stuff) from a few years back:
http://www.youtube.com/watch?v=6LEN_HNFK40


**Thanks for the link. Interesting. I didn't think of Tenma and, most
importantly, I didn't think of RS. I checked the RS site and their
prices are very competitive. I'd rather source my product from them,
because I trust their systems and back-up. Here's one from the RS stable:

http://au.element14.com/tenma/72-10500/power-supply-2ch-30v-3a-adjustable/dp/225194801


I'd prefer linear, due to serviceability, but I am also aware that SMPS
is more likely given the cost constraints.
Click to expand...

**Oops. That would be Element14, of course.


--
Trevor Wilson
www.rageaudio.com.au

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