Thanks to everyone who responded, it was most helpful. I did end
up getting a couple BNC->phone adaptors and sticking them on some
cheap cables, and things are working fine. I think the actual
measurements are probably off by 10x or whatever, but that's not
really what I need it for scoping MOTM audio.
Speaking of which, I already had a chance to put it to good use the
other day (and by good I mean "as something other than a light show")...
I was getting confusing results from a module as seemingly obvious as
the 910 multiple -- I had misinterpreted the less-than-crystal-clear
note on the product page and signals were showing up where I didn't
expect them and vice versa. Five minutes on the scope and I was able
to see exactly where signals were coming out correctly and where they
were adding together unpredictably, and eventually I divined the
mysteries of the jack logic.
--- In motm@yahoogroups.com, "jneilnyc" <jneil@...> wrote:
>
>
> This might be the ticket:
>
>
http://www.testpath.com/Items/BNC-Female-to-14-in-Audio-Phone-Plug-Adapter-112-130.htm
>
> --- In motm@yahoogroups.com, JAMES GALLANT <middlearthling@> wrote:
> >
> >
> > The way I did it way too many moons ago was to get a BNC to RCA
> adaptor and then use a cable with an RCA connector on one end and a
> 1/4" connector on the other. Another option is BNC-RCA adaptor -->
> RCA-RCA cable --> RCA-1/4" adaptor.
> >
> > James
> >
> >
> >
> >
> > To: motm@: jneil@: Thu, 29 Jan 2009 05:50:04 +0000Subject:
> [motm] Re: Scope question
> >
> >
> >
> > I was hoping it was as simple as this! But seeing all the
> funkylooking probes out there with all the odd connectors and
> built-inelectronics I just assumed that I was being naive thinking I
> couldjust make a cable.The Tektronics probes that came with my scope
> have BNC connectors withadditional contact pins coming out of them - I
> take it these aren'tnecessary in a homebrew cable?--- In
> motm@yahoogroups.com, David Abbey <abbeysynth@> wrote:>> Beg, borrow,
> make or buy yourself a coaxial cable with a BNCconnector on at least
> one end. Solder a 1/4" phone plug to the otherend (tip to center
> conductor and sleeve to the braid, but be carefulnot to over heat the
> braid and melt the dielectric). You can breakout a signal with a
> multiple by routing your signal into one jack,taking it out of another
> in that multiple and plugging your 'scopecable into a third. I made 2
> for my 'scope (A and B channels). Ialso made one with bananna plugs on
> one end to use with my DMM.> > > > > ________________________________>
> From: jneilnyc <jneil@>> To: motm@yahoogroups.com> Sent: Wednesday,
> January 28, 2009 8:24:37 PM> Subject: [motm] Scope question> > > > I
> finally sat down tonight at got my Tektronix to give me some> waveform
> views of one of my oscillators. There was more than a little>
> trial-and-error at first, but once I got in the ballpark I was able
> to> zero in on clear, static waveforms that changed shape in
> predictable> and expected ways, which was immensely satisfying (and
> will no doubt> impress my musical buddies, for whom a MOTM cabinet is
> already like> seeing something out of Close Encounters - this now adds
> that last mad> scientist touch). > > And I got the onboard frequency
> counter working, which is a nice plus.> > All this was done using a
> rather painful method whereby I clipped the> ground to one exposed
> terminal on the end of a phone cable and touched> the probe to the
> other. While this worked, it was not at all easy to> do one-handed,
> and clearly not a long-term methodology. What I really> want is to
> make this kind of connection permanent, ie just have some> sort of
> probe terminating in a phone plug that I can tap into any jack>
> without worrying about fiddly connections. Does such a thing exist,>
> either ready-to-use or in some combination of probes+adaptors? > >
> What do people who know what they're doing do? (he said, and not for>
> the first time...)> > Thanks!> JN>
> >
>