Recent Posts

1

Security / Re: Microsoft repackages apps with a telemetry .NET wrapper

« Last post by radiolistener on Today at 11:15:50 pm »

Actually you can.

Unfortunately Windows has a lot of different telemetry subsystems and some of them are hardcoded into kernel DLL's and cannot be removed or disabled.

But you can still run it without telemetry if you turn off ethernet cable and wifi adapter   

2

Buy/Sell/Wanted / Re: The Bad Shopping Experience Thread

« Last post by ttx450 on Today at 11:15:08 pm »

Scam warning.  I was scammed in the sell/buyer thread by this person purchasing a Leader 3217.  It was finally resolved by paypal on my end.   I hope Admins will back list him, not sure where to post this?



M3Knight - EEVblog user name
harveygrout75@gmail.com - Another Email account
markevans56@yahoo.com - Mark Evans is the paypal recipient

3

RF, Microwave, Ham Radio / Re: Transistor tester

« Last post by coppercone2 on Today at 11:15:07 pm »

you should try this in the repair forum since a germanium transistor is a device present in much more stuff then radios. the audio people know, and people are VERY concerned about their germanium transistors

4

Projects, Designs, and Technical Stuff / Re: 3D printing company similar to PCBWAY for circuit board

« Last post by Someone on Today at 11:14:49 pm »

then you discover subtractive metal enclosures are about the same price....

5

Test Equipment / Re: A look at the Uni-T UT210E

« Last post by ceut on Today at 11:14:03 pm »

A quick follow up of a problem of one of my 2 UT210E (the one I have given to my brother).
I have to fix his FAAC D600 motherboard which has failed and some burned part on it.

So, after having fixed it at home, I have gone to his home, and when I have rechecked the power voltage line, his UT210E reads 51V DC    (for a 24AC 86VA transfomer, which I have checked at home at 24.85V RMS on my Keysight U1233A and with my Siglent DSO 68V peak-peak (34V max and -34V min)).

=>So big fail for this 6 years UT210e old that I have flashed and contributed for mod it here  https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg1316832/#msg1316832

I have worked on it for about 3 hours, reflashing other 24C02 calibration file, checking many parts etc..
All other functions worked well.
Then I have removed fully the motherboard, and found the issue 
==> Wear of the rotary switch !   
2 traceshave lost their solder mask  as you will see on the photos.
I have put a piece af tape, and it is working again, with the good calibration I have made 6 years ago 
Now I have to find how I can isolate this traces... will try some UV solder mask

6

Beginners / Re: LC filtering for combined Vref/VDD of ADC

« Last post by temperance on Today at 11:12:20 pm »

You can power the ADC from a proper shunt reference with a voltage between 3...3.1 V. The digital part of the ADC can tolerate at its input Vcc +0.6V (absolute maximum rating)

As long as the difference between the SPI interface maximum voltage and the shunt ref. minimum voltage stays within 0.3 V, it will work fine and the SPI interface clamping diodes will not conduct.

An LM4040 is a popular shunt reference available in 3 V, 0.1 %, 100ppm. A REF2030 is 0.05 % and 8ppm.

7

Other Equipment & Products / Re: Pace ADS200 soldering station

« Last post by Hydrawerk on Today at 11:08:17 pm »

It is probably made of steel and/or aluminium. Pace MBT450 looks a lot more industrial than any today's JBC station.

8

General Technical Chat / Re: new propellantless drive company

« Last post by coppercone2 on Today at 11:06:59 pm »

That is no reason to investigate an effect. Then its just boring physics instead of popsci physics.

I recall reading that it was significantly above photon drive levels though (according to their experiments), IIRC the whole point was that there is a force that is bigger then the force expected from photons.

The usual problem, that is high power electronics lol. the ones that a experienced engineer sees it as a running lawn mower engine hanging on some springs, being measured with a caliper

9

Beginners / Re: Convert US standard 115V to International 230V

« Last post by IanB on Today at 11:03:04 pm »

I insist that with lower frequency (everything else being equal) the voltage at the filter capacitor falls further. Model an AC voltage source, followed by a rectifier bridge, a capacitor and a constant current load. My prediction is that the voltage at the capacitor and load falls further with decreasing frequency. It must be obvious to anyone.

I understand what you are saying, but surely the design would have to be very marginal before this had an impact on the following section of the power supply?

10

Repair / Re: Please help! TANNOY PRECISION 8D dead

« Last post by Valden on Today at 10:59:55 pm »

Hello to owners of Tannoy Reveal 6D and 8D monitors. I've just completed another repair, which is written up in the link below where there's a useful thread. Rather than duplicate, here it is ...

https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-audio-equipment/15433-tannoy-reveal-6d/page10?view=thread