Author Topic: Finally chosen a power supply! Siglent vs Rigol :-) (Read 9514 times)

carl0s · « **on:** July 17, 2018, 12:39:18 am »

I have been battling with myself. The DP832 just seems so big, so then I look at the DP711, and it looks great, and tidy, and less weird (odd one-colour LCD) than the DP832,, but it's really tall (twice the height of the DP832 and all of Siglents units). So I tune in on the Siglent single-output unit - it's not double-height like the Rigol 711, so I'm almost sold.

But I can't shake the feeling that one day I'm going to wish I had just one more output.. at least one more output anyway.

Anyway then I decided to check the size of the bigger Siglent out, vs the Rigol. Jesus! I'm sold on the Siglent SPD-3000X-E (-E being the lower resolution version).

Now, being an IT tech person, I really ought to have been able to do this on computer, but... I got the masking tape and tape measure out. Check out the size difference between these two. Also the siglent is 12mm shorter in height.

bingo600 · « **Reply #1 on:** July 17, 2018, 04:38:11 pm »

Sometimes

Smaller cabinet means noisier (faster spinning) fan

/Bingo

TERRA Operative · « **Reply #2 on:** July 17, 2018, 05:13:41 pm »

Don't forget to check how deep they are too, and compare to the depth of your bench/shelf space. Maybe the Siglent is deeper than the Rigol to provide a similar-ish internal volume?

I just had to swap a 250mm shelf with a 300mm shelf to fit my new Agilent 34461A.

carl0s · « **Reply #3 on:** July 17, 2018, 06:20:54 pm »

Quote from: TERRA Operative on July 17, 2018, 05:13:41 pm

Don't forget to check how deep they are too, and compare to the depth of your bench/shelf space. Maybe the Siglent is deeper than the Rigol to provide a similar-ish internal volume?

I just had to swap a 250mm shelf with a 300mm shelf to fit my new Agilent 34461A.

No, look, you can see the depth there! The Siglent is smaller in every way. Although, it doesn't have current limit control on ch3. ch3 is pretty basic if I understand correctly, but that's fine. I only need 1 or 2 really. 3 may add some convenience.

It's being delivered tomorrow anyway

DaJMasta · « **Reply #4 on:** July 17, 2018, 07:13:59 pm »

Quote from: bingo600 on July 17, 2018, 04:38:11 pm

Sometimes

Smaller cabinet means noisier (faster spinning) fan

/Bingo

Not really in this case, though. Been using my SPD3303X-E for about a year now and the fan barely even turns on until you start drawing a lot of power from it. A lot of the size of the rigol is actually the mounting feet and stuff, whereas the Siglent is just a box. An adjustable third rail and current readout for it is great, but the Siglent is cheaper, smaller, and otherwise pretty comparable.

carl0s · « **Reply #5 on:** July 17, 2018, 09:48:28 pm »

The Rigol is 42cm deep, vs 28cm for the Siglent. It's a huge difference.

And the Siglent is also narrower and less tall. (is there a word for that? shorter??)

bd139 · « **Reply #6 on:** July 17, 2018, 09:55:53 pm »

You’re in the UK. Look at TTi power supplies:

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F113107476949

Not mine for ref.

100% silent under full load. Will run at full whack or short indefinitely unlike some cheap end chinese crap. Full service manual available. Dual tracking 30-0-30v @2A, parallel 30v @4A, series 60v @2a or both floating. Not crazy deep so fits on the bench. Current limit. Current damping. Also acts as convenient shelf for digital scope

. Oh and made in UK.

And only £150 (or less if you shop around).

And if you need more outputs plug down £50 in the future for a single channel one. I’ve got two single channel units I paid less than 40 for each. (PL310 and PL154).

National Physics Laboratory use the same units for the cesium beam clock they run.

carl0s · « **Reply #7 on:** July 17, 2018, 10:02:08 pm »

Quote from: bd139 on July 17, 2018, 09:55:53 pm

You’re in the UK. Look at TTi power supplies:

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F113107476949

Not mine for ref.

100% silent under full load. Will run at full whack or short indefinitely unlike some cheap end chinese crap. Full service manual available. Dual tracking 30-0-30v @2A, parallel 30v @4A, series 60v @2a or both floating. Not crazy deep so fits on the bench. Current limit. Current damping. Also acts as convenient shelf for digital scope . Oh and made in UK.

And only £150 (or less if you shop around).

And if you need more outputs plug down £50 in the future for a single channel one. I’ve got two single channel units I paid less than 40 for each. (PL310 and PL154).

National Physics Laboratory use the same units for the cesium beam clock they run.

Well it's a bit late now!! :-) but thanks !

I was previously looking at new TTi stuff from Farnell, but they were pricey.

Anyway, in case my masking-tape on floor-tiles diagram wasn't very clear, I did some improvements to it in ms paint..

bd139 · « **Reply #8 on:** July 17, 2018, 10:04:04 pm »

DP832 is noisy. I didn’t buy one because of that.

Plus also it has some weird referencing across the three power supplies. Have a look in the manual.

carl0s · « **Reply #9 on:** July 17, 2018, 10:04:45 pm »

Quote from: bd139 on July 17, 2018, 10:04:04 pm

DP832 is noisy. I didn’t buy one because of that.

Yeah I did hear of people swapping out fans.

tautech · « **Reply #10 on:** July 17, 2018, 10:12:58 pm »

Quote from: carl0s on July 17, 2018, 10:04:45 pm

Quote from: bd139 on July 17, 2018, 10:04:04 pm
DP832 is noisy. I didn’t buy one because of that.

Yeah I did hear of people swapping out fans.

You will be happy with SPD3303X-E noise as DaJMasta has said, they're very quiet unless hammered and then more a whoosh rather than a howl.
Bit more grunt than the TTI unit for when you need it too.

Getting some SPD1168X's today so will post more about them later in their thread. Power ON overshoot screenshots and that sort of thing.

bd139 · « **Reply #11 on:** July 17, 2018, 10:18:07 pm »

I’m interested in the SPD1168X. Would make a good radio bench supply as my PL154 could do with some more amps. Please post a link to the thread on the TEA one or PM me

tautech · « **Reply #12 on:** July 17, 2018, 11:59:31 pm »

Quote from: bd139 on July 17, 2018, 10:18:07 pm

I’m interested in the SPD1168X. Would make a good radio bench supply as my PL154 could do with some more amps. Please post a link to the thread on the TEA one or PM me

Unboxing stock now but it'll be a bit before I get onto this so don't wait up and I should have something for you for your breakfast time.
https://www.eevblog.com/forum/testgear/new-spd1168x-siglent-psu/

Leiothrix · « **Reply #13 on:** July 18, 2018, 01:44:08 am »

Quote from: carl0s on July 17, 2018, 12:39:18 am

Anyway then I decided to check the size of the bigger Siglent out, vs the Rigol. Jesus! I'm sold on the Siglent SPD-3000X-E (-E being the lower resolution version).

That's the exact same reason that I got the Siglent too.

Comparing specifications, interface and reviews it gets a bit hard to decide. "Will it fit on my desk" is a nice binary decider though.

carl0s · « **Reply #14 on:** July 18, 2018, 12:53:12 pm »

Quote from: Leiothrix on July 18, 2018, 01:44:08 am

Quote from: carl0s on July 17, 2018, 12:39:18 am
Anyway then I decided to check the size of the bigger Siglent out, vs the Rigol. Jesus! I'm sold on the Siglent SPD-3000X-E (-E being the lower resolution version).

That's the exact same reason that I got the Siglent too.

Comparing specifications, interface and reviews it gets a bit hard to decide. "Will it fit on my desk" is a nice binary decider though.

:-) yep, it is!

It's arrived today, I had a quick look at it while at the office and it's a beauty! Back in the box in my car now, and will be finding a spot on the desk for it tonight

JanJansen · « **Reply #15 on:** July 18, 2018, 03:13:12 pm »

That is the one with the loose plugs.

carl0s · « **Reply #16 on:** July 18, 2018, 06:22:05 pm »

Quote from: JanJansen on July 18, 2018, 03:13:12 pm

That is the one with the loose plugs.

Yes but this has been discussed on the forums and it's not actually a problem.

What I don't understand though, is why the PSU is telling me it's in CC mode, when it's actually supplying a constant voltage as the current draw is under the set value.
I can't do anything to make it change from CC. Except switch the channel off - then it says CV.

I am a total newb, so am I missing something?

carl0s · « **Reply #17 on:** July 18, 2018, 06:24:32 pm »

I tried the same test on CH2 and it behaves as I would expect. Hmmm

carl0s · « **Reply #18 on:** July 18, 2018, 06:56:37 pm »

Seems I have a duffer :-/

The display/indication on CH1 will not change from CC to CV. Ch2 is fine. I've just downgraded firmware to 1.01.01.02.03 and that's made no difference.

tautech · « **Reply #19 on:** July 18, 2018, 08:01:27 pm »

If a PSU goes into CC mode it's normally an indication that you haven't got enough current dialed in or there a problem with the load itself.
For now you should dial in the full A output in the Set box and see how it behaves then.

I've got one here if we need to work through this online somehow.

carl0s · « **Reply #20 on:** July 18, 2018, 08:25:29 pm »

Quote from: tautech on July 18, 2018, 08:01:27 pm

If a PSU goes into CC mode it's normally an indication that you haven't got enough current dialed in or there a problem with the load itself.
For now you should dial in the full A output in the Set box and see how it behaves then.

I've got one here if we need to work through this online somehow.

Just uploading a video for you to check out... 10 mins.. Thanks

carl0s · « **Reply #21 on:** July 18, 2018, 08:45:30 pm »

https://youtu.be/O1HJAVE-b4E

and a follow-up:

https://youtu.be/1ivjeXsOMNY

carl0s · « **Reply #22 on:** July 18, 2018, 08:50:45 pm »

God damn auto-focus

I'm not a video maker ;-)

tautech · « **Reply #23 on:** July 18, 2018, 08:55:43 pm »

Vids were fine and display issue clearly, thanks.
Give me a bit to get a unit out and check some stuff....

carl0s · « **Reply #24 on:** July 18, 2018, 09:04:17 pm »

The only change I made to the unit before switching on, was to change it from 220v on the back to 230v, because I am in the UK. I suppose there could be some obscure bug where doing that destroys some part of the circuitry. Seems a bit far out though.


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Author Topic: Finally chosen a power supply! Siglent vs Rigol :-) (Read 9514 times)

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