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General Discussion / How to choose the right PDB and how to use it
« Last post by beno20192019 on June 09, 2019, 10:52:56 AM »
Hey, need some help with PDB (Power Distribution Board). my power supply input is six 12S (44.4v) batteries, and my output is six ESCs. The nominal current I use is 350 Amps, and the peak is 600 Amps.
I've searched online for a fitting PDB. the thing is, all the PDBs I find have 2 batteries input (whereas I need 6) .
Now I figured I could attach three batteries via their cables, or just use two copper plates (+,-) and use it as a power panel.
I dont really know if any of my ideas would work, need some guidance.
Any thoughts?
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Product Reviews / Re: DMM Beta 1760/RMS
« Last post by Mr Eastwood on May 11, 2019, 04:27:06 PM »
Rebranded means same hardware, different package, right?

I think generally it means a different look;  i.e, a different logo / case colours,  but to me a re-brand doesn't include different dials settings;  I'm not sure it's a rebrand of the MT1887 as the dial settings are different which indicates the pcb is different;  a lot of meters can use the same chipsets and so they can appear similar in core features;  a popular chipset is "Cyrustek", which is the one in the Beta 1760/RMS DMM.
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Product Reviews / Re: DMM Beta 1760/RMS
« Last post by Whittis on May 08, 2019, 08:34:04 AM »
Rebranded means same hardware, different package, right?
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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by ProBang2 on May 02, 2019, 10:15:04 PM »

Happy to see the second unit works fine, too!   :)
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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by Mr Eastwood on May 02, 2019, 06:03:12 PM »
Hi,   

"When was the current source built? My guess would be: Pretty much 40 years ago."
Quite possibly, they used the same case design I think for a good few years.

"BTW: Regarding the readings from your second Solartron 7150: 0.29 mA, 3.88 mA.
Is there sadly a problem in the lower current range? "

VERY good point!  looking at the service manual there is only 1 range for current and that is 2A;  so a big jump like that looked quite odd;  so i left both meters on for about 5 hrs; then re-did the readings for #1 and #2;  but this time both meters were NULL'd and then i switched on the FILTER.

Basically much better readings.



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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by ProBang2 on May 01, 2019, 11:24:27 PM »
Hello!

Thank you for your efforts. It seems, the 505 DC current source is still pretty well in spec.  :)
(Maybe a little on the low side, but that could easily caused by the resistance of the test leads and the current shunts. The tolerances of the DMMīs are added anyways.)

So I have to say: I am really very impressed from this device.  :o

When was the current source built? My guess would be: Pretty much 40 years ago.
And works still fine...
I donīt expect such a long lifetime from the items, nowadays produced.

BTW: Regarding the readings from your second Solartron 7150: 0.29 mA, 3.88 mA.
Is there sadly a problem in the lower current range?  ???

Greetings
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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by Mr Eastwood on April 27, 2019, 01:52:56 AM »
That is mean!    >:(  Somehow it would be interesting to me, what the connected DMM shows...    :'(

ProBang, I know that was really mean of me,  it was wrong wasn't it! :)  SO to try make it up to you I have posted some readings; 

the dial settings were set at: 4000 on .9999, 9.999 and 99.99 mA ranges respectively matching the images (left to right) or (top to bottom)

the meters used were:  idm 305 (1), idm 305 (2), idm 305 (3) and solartron 7150 (1) and solartron 7150 (2)

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YouTube Video Episodes / T4D #136 - Almost there...New studio almost ready!
« Last post by SeanB on April 19, 2019, 02:49:31 PM »
T4D #136 - Almost there...New studio almost ready!

https://www.youtube.com/watch?v=8O6JIzP7Ajk



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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by ProBang2 on April 16, 2019, 04:20:05 AM »

That is mean!    >:(

Somehow it would be interesting to me, what the connected DMM shows...    :'(
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Older Technology / Re: Time Electonics - Model 505 D.C Currrent Source
« Last post by SeanB on April 13, 2019, 04:37:06 AM »
Very nice looking unit.
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