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YouTube Video Episodes / T4D #138 - My fav bench kit, the well...and last tour!
« Last post by SeanB on August 01, 2019, 12:38:38 PM »
T4D #138 - My fav bench kit, the well...and last tour!

https://www.youtube.com/watch?v=1GcLi6Ixvlc

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Hi..It can be done but why would you want to do this? UPS system work exactly opposite. They use inexpensive commercial power and only switch to battery power in the event of a power failure at which time a generator starts and takes over.
A 100 watt off-grid solar can only power a regular desktop PC for only a few short hours in a day. So if this computer was running say 24 x7 or even say 10 hours per day a 100 watt system is not going to keep it powered up and will be running on AC most of the time.
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General Discussion / Are there any normal guys here?
« Last post by FannieVop on July 22, 2019, 05:24:24 AM »
As I understand it, Ill wait for an answer to my personal messages for a long time, so I am writing here!
 
Actually, Ive on your forum a long time ago, but I had to register again - why, Ill tell you later.
Recently, I broke up with my husband (some people know him here!), and I've been chatting on dating sites for 2 years. It's a shame, but it's true.
Dating sites disappointed me. Too many perverts and just dumb men. I like strong intellectuals. I am an engineer, but also I'm trying myself in the modeling business. ... ;)
 
Oh yeah, I'm 24, and I love online chat rooms))) instagram, skype. I'll reply only with a personal message! But I can answer in the evening only - I'm running away for a while!
I hope for a serious relationship. Write, maybe I'm lucky here.
 

 
Post changed:
Great, the photo didnt load! Does anyone know how to fix this?
In any case, my other photos can be viewed here, I will be glad to meet you, I love flirt))
 
http://luvandates.com/profile/FannieVop/
 
 
P.S. Ecobion! Dont write me again, dude! You're in ignore list!
___________
Post changed 22.07.2019
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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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