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I might be able to help with that part. Have a look here: https://sites.google.com/view/sark100

Had someone bring one of these and it had indeed impact damage. One of the SMD capacitors was cracked. I replaced that one and .. it still didn't work. As it's all SMD's I just left it at that.. didn't have the time (or energy) to troubleshoot it further.

Ran it for a bit over 2 hours on the powerbank during which I upgraded the firmware to the latest 1.0.4 and ran a pretty long self calibration. The battery now is at 22%, so I guess that 3 hours is a bit optimistic, but maybe if it isn't running full steam all the time it's possible.

I don't know about the Siglent, but the Rigol runs Android 7 (from 2016, End of Life in 2019) underneath. As I'm a software engineer.. that's just not acceptable to hook up to a network IMO. Way too old and Rigol doesn't actually offer regular firmware updates, nor do I believe they are patching...

The USB-C power part on the Rigol was one of the things I actually liked. Already bought a powerbank for it, so that I can use it by running it from the powerbank. Forgot to test that, but I just booted the scope from the powerbank, it certainly works. :) Another thing I did like was that you...

Wow.. I think you bought the right one. The Siglent has a sample rate of 2 GSa/s versus 1.25 on the Rigol. Also the memory depth is 100 Mpts/ch versus 50 Mpts on the Rigol. Both when there's a single channel active. I've got swayed by the 250MHz bandwidth on the Rigol versus the 200MHz on the...

No need to stop linking videos as far as I'm concerned, learning a lot here. Thanks!

Those are cool too, very handy. But one thing at a time, hot air station on my way. lol

That was amazing. I need a hot air station :) Thanks!

Another option is getting these from Stef, he's specialized in Ham International (aka cybernet) parts. https://www.ham-international.eu/pages/VCO.html That's where I get my cybernet VCO's.

It was 9K2ES, yes around that frequency, but about 3 weeks ago. I thought it was pretty cool that he could hear me reasonably well (with some QSB) while I was only using 5 Watt. Most people down there seem to be using 1KW or more. Last night around midnight CET I heard him on 40 meters, didn't...

Pretty much. I laugh about that with my wife and call it "can you hear me now?" calls. Although I do admit that I will partake if it is a country I've never reached, like Japan last week on 50 Watts, that was a first. Or.. when I'm QRP and able to contact Kuwait or the US. But yes.. just...

This user is clearly not very active on here, you might be better off sending him an email via the address that the has on his QRZ page. If you don't have a QRZ account then I can PM you his email address so you can try to contact him there.

A while ago I got some $20 cleqee P2200 probes from AliExpress, they seemed ok-ish. Using the word "seemed" as I've only used them a few times on my old boat anchor Philips PM3260E. The reason I only used them a few times was because usually when I needed to use the scope, .. it wouldn't turn on...

The "Screwdriver's guide" from Franklin has a whole section discussing this. In principle it's a myth, but there's some specific cases (IIRC when the coax is intended to be part of the antenna system) when it does matter.

I hear you. While I'm fairly OK with soldering, replacing a 28 pin SMD chip requires experience in SMD soldering. If you never did that before, then I recommend to not try that as your first SMD experiment. There's too many pitfalls. That's why I looked around for somebody experienced in the...

Yes, these radios are actually really nice. One more note. In my case I only had one of these chips replaced and not the modification done. If you do opt for the zener mod, then beware that this apparently will negatively influence receiver sensitivity on 70cm. Maybe I'll add the zener mod...

Yes, this is a known issue with the TYT TH9800. I bought one on the cheap with this issue. It worked well, except no audio output on the 2m/70cm. As I didn't have my license at the time, it wasn't a big issue. But.. things changed and I needed it to work. So I researched this. There's two audio...

Thank you, exactly what I was wondering when I read that. I don't think I"ve started 5 threads, but otherwise... "I understand the rules and wish to enter the contest." :)

It's not you. The image just doesn't show. When I try to open the image by itself I get a insufficient credentials error. " Oops! We ran into some problems. You do not have permission to view this page or perform this action. " The image has been limited in some way. -- Skyline