Help with purchasing probes for my Tek 2465B

Thread Starter

AcousticBruce

Joined Nov 17, 2008
58
I just bought a Tek 2465b 400Mhz 4CH scope from a lady around the corner. It has no probes with it and I need to get some!

P6137
P6138
P6134

All of these are 400Mhz probes from Tek. I was looking on Ebay. A lot of these are from China, and frankly, I do not want to purchase this stuff from China. I was wondering, does anyone know of this brand?

http://www.amazon.com/Pomona-6498-M...8&qid=1395402313&sr=8-1&keywords=400mhz+probe

Is this a good probe, or should I stick with purchasing Used Tek Probes? Or any other Ideas.
 

bountyhunter

Joined Sep 7, 2009
2,512
Yeah. I am wondering if you are of the mistaken belief that you have to buy 400 MHz probes to use if the scope has 400 MHz bandwidth.....

If you are buying your lab equipment from a lady around the corner, I suspect 100 MHz probes would be more than adequate.

But if you are convinced you need 400 MHz probes, go for it.

BTW: the probe you listed from Pomona is a 100:1 ratio probe. For most general uses, the signal from it will be too small. It's typically used for HV apps or apps where even the slightest amount of capacitance will upset the circuit.

The Tek 6137 400 MHz probe is a 10X probe, not 100X.
 

crutschow

Joined Mar 14, 2008
34,285
You should consider a switchable probe that can used as either a 10:1 or 1:1 probe. The 10:1 probe is good for most purposes for minimum circuit loading but the 1:1 is useful for low level audio or other low frequency applications where you may need the additional factor of 10 gain a 1:1 probe give.
 

bountyhunter

Joined Sep 7, 2009
2,512
You should consider a switchable probe that can used as either a 10:1 or 1:1 probe. The 10:1 probe is good for most purposes for minimum circuit loading but the 1:1 is useful for low level audio or other low frequency applications where you may need the additional factor of 10 gain a 1:1 probe give.
+1 Definitely need that.
 

Thread Starter

AcousticBruce

Joined Nov 17, 2008
58
If you are buying your lab equipment from a lady around the corner, I suspect 100 MHz probes would be more than adequate.

But if you are convinced you need 400 MHz probes, go for it.

BTW: the probe you listed from Pomona is a 100:1 ratio probe.

I got lucky, the lady around the corner is from craigslist and I was looking for a 2400 series Tek scope just for bad-assness. I was reading somewhere that you can miss out on some inductive spiking at high MHz so more is always better.


I at least want one 400Mhz probe and yes 10:1 makes sense. Is there a 10:1 400Mhz probe you know of?
 
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