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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

I had a PDP8I in a 19" 6ft high rack and when we moved in to a new house it occupied the spare bedroom. The mains is 240v in the uk. I would feel a "tingle" when I brushed my hand over the frame.

Many decades ago, while working at Motorola, one of the engineering workbenches gave me a very slight tingle. I traced down the reason: The hot wire was interchanged with the ground wire! As a result,

In that same vein, my electronics lab had several features I added after working on OH and CH downhole tools. Fashioned a Deadman Pedal that had to keep pressed to energize tool with 200-400vdc @

I don't know if this is still taught, but in vacuum tube days, where lethal voltages were often exposed, they used to say to have a walking-cane nearby.? It must be wood.? And with the curved

And eliminating all the tracking nonsense: https://www.amazon.com/Oscilloscope-Multiumeter-Bandwidth-Automobile-Maintenance/dp/B09T96DH39/ref=sr_1_9 Please be aware that [often/usually] everything

Andy, It’s this model (excstly) :

A few comments on taking measurements on AC Mains. With the exception of rated battery operated DVMs or neon testers, don't unless you know exactly what you are doing, what you are measuring, why you

There weren't any harmonics but the audio sounded, and I hate this discriptor, muddy, smeared. There might have been a very weak comb effect. I fed band width limited white noise, sharp cut off at

Exactly as I suspected. That means THERE IS harmonic distortion on a simple assembly. Thanks for confirming! Can I ask if you noted any of the harmonics at the audio part of the spectrum? Nuno T.

That seems like a very VERY bad idea!? As in, a severe safety hazard. But I may not fully understand what you are asking. To me, DMM style implies having no metal on the instrument'that the user can

I am trying to figure out if this is the start of a new conversation, or if it is meant to be a reply to another one.? Without any context, I assume it is the former. (It is quite challenging for me,

The new transistors are oscillating at about 1GHz, the frequency is frequency modulated by the incoming audio! The cure was a ferrite bead on the base and collector (now that's a first for me) and a

There are no license free bands or frequencies in the 700~800 spectra. At the moment, December 9, 2024, the FCC has allocated 902-928MHz for license free part 15 operations. There are many

Hi group, About an hear ago, I saw a portable (battery operated) 2 channel scope for approx $120-$200 (depending on max bandwidth) and bought one. While I never work on mains voltage, I figured it

MOTOROLA Model H18UCH9PW7AN 700/800 MHz Question: Can two of these units be used as 'walkie-talkies' around the house/homestead/farm without a license or a 'repeater etc?'

If someone knows that an electronic component can fail or misbehave under unusual but possible conditions, there is nothing off-topic about it. Andy

I apologize, I thought the helium kills MEMS oscillators to be vaguely related to electronics but not related enough to stay "live" and intended to provide enough information for those interested in a

Feedback. Coupling. Andy