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Decent benchtop multimeter for beginner?

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Aldo22:

--- Quote from: MiroS on August 19, 2024, 11:22:36 am ---They were sold on local market for 2-3 EUR some time ago. I think they all finished in trash.
AN270 is high-tech rocket comparing to 'that'. I do not think it is RMS mutimerer, most likely not at all.
USSR technology was modern in building tanks, prisons, spy factories, atom bombs terror,  poisons,
economical exploataion occupied countries,  but never in area of multimeters.
I would not touch this device, this plastic can be toxic, USSR did not care for such little things like heath.

--- End quote ---

Oh yeah, it's old, ugly and it stinks, but it pretty much shows the same values ​​as the oscilloscope for Vrms up to 50kHz.
That's definitely something the AN870 does not.

MiroS:

--- Quote from: Aldo22 on August 19, 2024, 11:45:33 am ---Oh yeah, it's old, ugly and it stinks, but it pretty much shows the same values ​​as the oscilloscope for Vrms up to 50kHz.
That's definitely something the AN870 does not.

--- End quote ---

Vrms? My guess is that this is not the case. AN870 can do RMS at least up to 1-3 kHz. That one most likely only for 0 Hz.
Btw using it would be like hearing German radio from III Reich era with big black eagle on front panel. 
Personaly I do not see the difference between both regims and their artifacts.

Aldo22:

--- Quote from: MiroS on August 19, 2024, 12:21:21 pm ---Vrms? My guess is that this is not the case. AN870 can do RMS at least up to 1-3 kHz. That one most likely only for 0 Hz.

--- End quote ---

It certainly matches the VRMS value for sine (Not True RMS).
Perhaps "average rectified value" is more appropriate?
https://en.wikipedia.org/wiki/Average_rectified_value

tszaboo:

--- Quote from: Aldo22 on August 19, 2024, 10:19:04 am ---A bit off-topic, but aren't we anyway?  ;)
I just found out that my very old USSR multimeter (1978) can do something that my modern DMMs cannot: It can measure AC voltage at 20kHz. Even at 100kHz it is still within 3dB.
In the picture it should show 1.77Vrms. The reading is about 1.78Vrms @20kHz sine (5Vpp).
My An870 is completely useless at 3kHz already.

So every little meter has its raison d'être.  :)

--- End quote ---
Even a 34401A is going to measure 300KHz with 4% accuracy. 100KHz is 0.5% or 0.04dB.

Aldo22:

--- Quote from: tszaboo on August 19, 2024, 12:41:09 pm ---Even a 34401A is going to measure 300KHz with 4% accuracy. 100KHz is 0.5% or 0.04dB.

--- End quote ---

I don't know what you're trying to say.
I'm talking about a rotten 50 year old analog meter sitting in the basement and you're talking about a $1000 top of the line DMM.
What's the connection?

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