Electronics > Beginners

Lower bandwidth probes for a higher bandwidth oscilloscope - bad?

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fazeka:
Hi all,

I have an older Tektronix 2445A 'scope that needs a new pair of probes. The only work I do is in the audio realm. Highest frequency I would test would be the bias frequency of an analog tape recorder (432 kHz).

My friend has a set of Pomona 6493 probes he would consider selling me. I did some research and found that these are 60MHz. The Tek 2445A is a 150MHz scope.

I've researched online, seems everyone suggests going with probes that are higher bandwidth.

What's issues would I encounter (for audio work, if it matters) with using 60MHz probes with a 150MHz scope?

Thanks!

jadew:
For audio work you can use coat hangers and it would still work.

That said, why not get 150 MHz probes and be able to use your scope to its full potential when you need it? I think there are plenty of low cost options for that range.

fazeka:

--- Quote from: jadew on December 30, 2019, 08:26:27 pm ---For audio work you can use coat hangers and it would still work.

--- End quote ---

 ;D


--- Quote from: jadew on December 30, 2019, 08:26:27 pm ---That said, why not get 150 MHz probes and be able to use your scope to its full potential when you need it? I think there are plenty of low cost options for that range.

--- End quote ---

I know I said friend "would consider selling me"... I should have said "he owes me"...  ;D

fazeka:
One thing:

Is it going to be a problem if the new Pomonas have a compensation range of 15 pF to 40 pF whereas the original Tek probes had a compensation range of 10 pF to 25 pF?

tautech:

--- Quote from: fazeka on December 30, 2019, 08:45:10 pm ---One thing:

Is it going to be a problem if the new Pomonas have a compensation range of 15 pF to 40 pF whereas the original Tek probes had a compensation range of 10 pF to 25 pF?

--- End quote ---
Nope.
If anything a wider compensation range for the probes is more desirable.

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