Recent Posts

1

Repair / Re: Desoldering advice

« Last post by Psi on Today at 12:49:31 pm »

What soldering iron and iron tip are you using?
It sounds like one or both are not up to the task.

They make more of a difference than most people think.

2

Repair / Re: FLUKE 8920A RMS AC meter failure needs help

« Last post by daisizhou on Today at 12:44:20 pm »

I checked the fault according to the troubleshooting table on page 53 of the service manual.

3

General Technical Chat / Re: $20,000 dollars of software or licences on a thumbdrive ?

« Last post by MathWizard on Today at 12:41:10 pm »

I'll try and find that post, but I'm amazed at the prices some of this software. But yeah I forget even something like Matlab, has some $2,150 perpetual license on their website.

4

Test Equipment / Re: SDS800X HD Wanted Features

« Last post by mawyatt on Today at 12:36:01 pm »

A nice feature for all the Siglent DSOs that support Bode Plots and Math Functions would be to allow the DUT Input and Output selections to support not only Channels 1-4 but also the Math Function. With this added capability using the Bode Plots for Impedance and Admittance measurements/plots becomes more straight forward without the need for additional support equipment such as Current/Differential Probes.

For example, one could use the Math function to subtract the voltage probed across a Reference Resistor with a pair of Channels to use as the DUT current for the Bode Plot.

Best,

5

Repair / Re: datron 1071 error7 Seeking help

« Last post by MuShan on Today at 12:29:03 pm »

I suspect it's a problem on the DC board

6

General Technical Chat / Re: Your pet peeve, technical or otherwise.

« Last post by antenna on Today at 12:26:56 pm »

Amazon and Ebay begging for product reviews before I have a chance to test them out.  They think the review should be based on shipping and first appearances. I like to test things out first.  They could give me 2 weeks to get to know the product before filling my email box with junk.

7

Repair / Re: Desoldering advice

« Last post by antenna on Today at 12:25:00 pm »

The chipquik is low melting alloy (around 80°C), but it does not like going in my solder wick (MG Chemicals SuperWick #453).  I do have a propane torch soldering iron tip that is a half inch diameter, I will try that route.  The problem with heating the whole thing to the necessary temp is the surface mount parts under and near the relay. I also worry about lifting the foil off the PCB. There are many SMD parts around and under the relay and I cannot risk them all falling off.

8

Repair / Re: Keithley 2400 locks up when buttons are pressed

« Last post by tomn on Today at 12:22:45 pm »

Unfortunately SYST:MEM:INIT didn't make any difference.

Looking at the CPU32 manual, it seems quite possible to build a debugger for it. It would be nice to have a less valuable target to develop against, though.

9

Microcontrollers / Re: Attiny1606 burning out when connected to a drv8251

« Last post by lavaman on Today at 12:21:59 pm »

There should not be anything wrong with the components. I have installed a whole new set of brand new components

10

Repair / Re: Replacement for Fluke 845AB OPR switch?

« Last post by tatel on Today at 12:21:34 pm »

I found your videos about F845AB quite interesting.

It's perhaps a lesser bad that the broken switch is a quite simple one; after looking at the picture, one could think at least a couple way to fix it. Thanks for your suggestion, I'll look at it.