Відео

I have never tried to use it somewhere else.

@@polymath.electronics probably it's a vga monitor, I want to try it, but I have no one🥲

In this video I used Keiba HA-D04.

These batteries have to be replaced once in every 10 years, so I don't see any problems in soldering them.

40dB is 10000 times less than expected. So it doesn't work okay. ;) Where did you measure the amplitude? Seems like cable/connector failure.

Thank you, William! These units are really undestroyable. ;)

$350 as of November 2021 if the web site is still active.

I've got this oscilloscope with a broken CRT, so I had to replace it with something. As it was really complicated to get an orginal CRT, I decided to retrofit it with LCD. What do I gain more? There some aspects like: weight, power consumpsion, no X-Ray. Does it matter? I don't know. Perhaps it's critical for somebody... ;)

@polymath.electronics okay, if it was broken, more then legit 😁 My remark was more of a question. What would be the resolution differences, or maybe some differences in refresh rate and that kind of stuff.

On analogue scopes, you're seeing the actual wave as it scans across the screen. On a digital scope, you're seeing a rasterised frame by frame image of the wave after it's been sampled and processed, so the deflection only needs to be as fast as any TV CRT.

Thank you! It's not far from the reality of HF-geek: I'm thinking about buying an electric screwdriver... ;)

The MOSFET is SHF0189. It's available on aliexpress: alii.pub/6on765

That mosfet as well as the HP amplifiers fail on these quite a bit, as all 6 units had pretty much same issues. Only one which was from factory bodge job wire on back plane they ran wire between pins and cause the attenuator control to short causing the ALC 110 error on 75 MHz and below. I kind of figured on that one was a attenuator control issue as signal looked good and tapping on the unit output was magically, correct? Sure enough wire rub though on pin next to it causing issue, now fixed and thankfully no other issues but going to do the Ram battery next. That one was the first oddball that wasn’t a amplifier issue. Normally use to the rohde & schwarz generators liking to cook the output amplifier and operational amplifiers as they ran them high and tend to cook themselves to the point have the full reel of those components laying around as usually going to need them at some point. You are very correct a very common issue they ran those amplifiers much higher then they were designed for.

You are welcome!

Did you have the same success unlocking your 754C?

Thank you!