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I'm not well versed on the subject, But I wonder if it would help to drive one channel of your scope through a well filtered say 6V transformer, then the other channel connected to the ac line with a

PID control is not required for PLL operation.? Your loop filter should be a simple low pass chosen such that the frequency sum terms are removed and frequency difference terms are preserved. This is

You clearly know what you are doing and have an extremely good reason for monitoring the AC Mains. You need to see near instantaneous changes in the input and output. Very few people have that

While there are ion chambers in smoke detectors that use a radioisotope, I was referring to an ion chamber designed to measure radiation. While I probably have more then a dozen "professional"

Hello, I have built a PLL system based on the article attached. In the scope photos we see the IF signal of the mixer. When the servo amplifier is ON as shown in photo 3 then the error signal ripple

Because my scope is the only accurate tool which I have during the last 2 decades. And I had to design and produce various power mains stabilizers. I am sorry for what happened to your friend.

Yup. It is critical to calibrate against a known source, and set HV accordingly. Arbitrarily choosing an HV based on 'gut instinct' might work with newly brand new, but after being in the hole at

Yup! -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A.

While the steak was great, helping a friend solve the "impossible" was a lot more rewarding.

Please don't get me started on the NEC or 'adopted by reference" to avoid complying with "laws can't be copyrighted." It is my favorite rant, outshining religion, politicians, economics or

Not necessarily. I've been doing AC wiring for a long time. Helped the landlord with outlets and lighting as he finished his basement, an electrician was called in to inspect afterwards, no

Thank for the feedback. Hope you enjoyed the meal! J Nuno T. Sent: 09 December 2024 22:43 To: [email protected] Subject: Re: [electronics101] Muddy audio in AF power amp There

Should read "new pain med" !!!

Some highly paid electrician. I've seen more miswired AC Mains outlets in my life then I can count. Reversed hot neutral, reversed neutral ground, reversed hot ground. And the NEC requires the

A safety hint. If you decide you've just got to look at the AC Mains with a battery powered oscilloscope, reconsider, if you still decide 'I just have to do this...' then consider using a AC mains to

This reminds me of one place where I used to live. We were in the upstairs apartment, and them downstairs mentioned getting a tingle from the washer or the dryer, I forget which. So I put a meter

I'm going to borrow your deadman peddle idea. I seldom work on tube/valve equipment today, everything is 5 or 12V. Which is safer in one way because I'm not constantly poking around in 300V

Sorry, the new pain me is useless and I didn't sleep last night so I'm a bit sleep deprived and making assumptions not backed up by reality.

For the benefit of those who might not know this: GM - Geiger-Muller.? As in, the key part of a Geiger-counter. Having a common vocabulary is always a good place to start. Andy

One major problem with using GM tubes for radiation monitoring is they can overload and either go dead or produce an extremely low count, much below normal background. Scintalation counters can