On Thu, 2 Jul 2015, Mark Zacharias wrote:

"Ralph Mowery" wrote in message
...

"amdx" wrote in message
...
On 6/30/2015 5:13 PM, Dave Platt wrote:
If it's a dual binding-post/banana-jack on 3/4" centers, adapters are
easy to find. Try a search for "bnc banana adapter" on eBay.

Even if these adapters don't happen to have the right spacing for your
'scope, you can always buy one, and a couple of short jumper cables,
to make the connection.

Or, wire up a female BNC jack to a couple of wire pigtails.




yup,
http://www.pasternack.com/bnc-to-ban...-category.aspx


At the price of the adapters unless the probe is high dollar, you can get a
whole new probe rated over 50 MHz for the same price. I bought a coupld
to use with a 100 MHz scope and can not tell much differance in them an a
Tectronix probe rated for the same frequency range. That is why I said
just cut off the end unless he has a bnc connector laying around he can
just pigtail a couple of wires to.




Maybe overkill to buy a modern probe and try to "hack" it to use on this old
'scope.

Just use a set of conventional 4mm multimeter style test probes. The high
frequency limitations of such a probe arrangement aren't a concern with this
'scope, which probably has a bandwidth of perhaps 500 kHz.

I suppose the 1 meg input impedance might load down certain nodes in the
Arduino, though...

Here's another thought. One can often find a funtional dual-trace 50 meg or
so 'scope with probes in the 50-75.00 range on eBay.

Just a thought...

I've been wondering about the scope. If the bandwidth is so low, then it
may be an AC coupled scope, and lacking triggered sweep. Lots of fun as a
beginner, I got one of those when I was about 13 at a ham club auction for
five dollars, since it got me a chance to play wkth a scope. But for
practical purposes in 1972, the best it could do was display some audio
frequency waveforms. Not useful for that logic stuff coming in, not
useful for RF.

The conundrum is that the scope he has is available, and can he get
something out of it? Fifty to seventy-five dollars is not bad for a scope
you describe, but for a beginner, it may not yet be something he's wanting
to spend money on.

Michael