Recent Posts

1

Projects, Designs, and Technical Stuff / Re: more modern version of tl494?

« Last post by 2strokeforever on Today at 08:04:43 pm »

Thanks, thats exactly what I needed to know.

Software control is way above my pay grade, and I would rather have more reliability.


UC3525A has:

• Pulse-by-Pulse Shutdown
• Latching PWM to Prevent Multiple Pulses

TL598 has "Internal Circuitry Prohibits Double Pulse at Either Output"

from what I can tell the TL598 can be used to limit pulse current

and an extra error amplifier


So far I am leaning towards the TL598 unless someone has good reasons to that the UC3525A might be better

2

Computers / Re: Format a 256GB pendrive with FAT32 using a windows 10 pc

« Last post by magic on Today at 07:59:29 pm »

I haven't seriously used Windows in 20 years, but I strongly suspect that any "slowness" is a matter of using right options, such as disabling "full formatting" (pointless overwriting of all space on the drive). Run it with /? first.

3

Test Equipment / Re: TDS 5XXX Series Oscilloscope External screen no trace

« Last post by gianrisa on Today at 07:59:23 pm »

Hey you should have two vga output, one it is the PPC outout and the other one is the Main board PC output. The Tekscope doesn't allow high resolution on the screen if you increase the resolution of the external screen you will not see any waveform output.

4

Test Equipment / Re: SDS800X HD Wanted Features

« Last post by ebastler on Today at 07:58:49 pm »

I wonder how many use these buttons.

Any advanced user with some active Math channels.

If you find yourself with some spare time, why don't you embark on reading the second sentence of eTobey's post? I am sure you will make it through...

The particular situation shwon in eTobey's screenshot seems awkward, but is probably due to the large fonts he has enabled. The only reason for the arrows to be shown is that the arrows take up room, so the CH1 box cannot be fully shown. In this case, there should be no arrows and all four channels boxes fully visible.

With the regular, smaller fonts, omitting the arrows would not make enough room available to show an additional full info box, I believe. So in general, I am fune with keeping the arrows.

5

Repair / Re: Help repairing Klipsch KDA amplifier power supply and identifying smd component

« Last post by r2digital on Today at 07:50:46 pm »

this is great, thank you! I do believe FDC655BN is the part

6

Test Equipment / Re: new killer scope in town - a true game changer from R&S - RTB2002 & RTB2004

« Last post by Darkover on Today at 07:45:00 pm »

I did not know that there was a kind of RT-ZP03 with 1x/10x switch, but is using this kind of probe not a
pain in the ass with a scope that can not autodetect the switch position?
There are very few reason why you should need a 1x probe with the limited bandwith on a 300Mhz scope with 12Bit.

> and all three waveform adjustments are now inside the small enclosure at the BNC connector.

I think that means your probes are the older type. The newer type has only two adjustment. The
third one is hidden behind the sticker.

> Nonetheless my last Rhode and Schwarz purchase.

I can understand. This company was always good in asking high price, but they became now bader in delivering a value for the money.
If I pay for a mercedes I like to drive one and not a beetle. (no 50R termination, no probe detection, fat probes)

Olaf

7

Test Equipment / Re: SDS800X HD Wanted Features

« Last post by tautech on Today at 07:44:17 pm »

I wonder how many use these buttons.

Any advanced user with some active Math channels.

8

Repair / Re: Rigol DP712 Output Shorted; Fuse? / I Screwed Up

« Last post by macboy on Today at 07:38:43 pm »

The Thyristor (SCR) is part of the over-voltage protection circuitry. It is designed to protect the device connected to the supply from excessive voltage. Various things could cause over-voltage including failure of the power supply's regulation, but the protection works the same in all cases: when excess voltage (over the user-programmed limit) is detected, the SCR is triggered, which essentially shorts the output. Usually, when the power supply itself is the only source of energy at the output terminals, this is OK. When a high energy battery is connected, this is not OK!

9

Test Equipment / Re: Siglent SSA 3021X... Ooops

« Last post by tautech on Today at 07:37:17 pm »

Something very strange happened.

When I did the sweep, the SA barked at me with an overload.

I need to look at this more and make sure I'm not chasing bad data.

Good.
After a Preset all previous settings are set to factory and the analyzer attempts to protect itself.

Some wrongly use Manual attenuation to correct for external attenuation when instead they should shift the Ref Offset for Markers to display the correct level.
When set to Manual the analyzer is locked out from automatically managing its internal attenuation that varies with settings used.

10

General Technical Chat / Re: Is LinkedIn worth keeping?

« Last post by coppice on Today at 07:36:56 pm »

I had one headhunter phone my present day employer for a reference  The boss was freaked out of course. That was awkward - I phoned the recruiting company and flamed the manager, for hiring total bimbos. Headhunters are generally stupid and sharks that are only after the placement dollars and collecting candidates. I have a friend in that business and she tells me the stories. It's basically desperation to pimp you out, by people who have no idea about the technical skills names, meanings etc.
Within a headhunting company, they routinely backstab each other and steal candidates.

When you find an ex-engineer working in recruitment its such a wonderful experience. Most recruiters aren't just limited by their own understanding, they aren't even trying.