Hi Umashankar!
Very many thanks for your detailed and informing reply. On the basis of you=
r information, I was brave enough to try again my CM-300 with initially the=
omni capsule. To my bemusement it worked perfectly. I then changed to the =
CP-4 shotgun capsule, and this worked perfectly also, with no nasty initial=
noises. I then tried my iRig with ME-66 but still no go; absolutely dead. =
But now to confession time; I had totally forgotten that I had to use a lea=
d/connector adaptor between the iRig lead and LS-10!!!!! I'm feeling unabas=
hedly, cringingly stupid about this, and apologise to the whole group for t=
his lapse. I will of course put it down to a prolonged 'senior moment'!!
In a way I'm sorry I found out, because I was just about to buy a new recor=
der!
Once again my apologies to you Umashankar. One thing I did find in my net t=
rawling was the following link which you may find of interest, if you weren=
't aware of it already; it mentions our friend Klas. See reply #11 here:
http://www.groupdiy.com/index.php?topic=3D27274.0
Cheers
Max
--- In umashankar <> wrote:
>
> dear max
> =A0
> this is a reply to both this and your next message.
> =A0
> I will first tell you what I know of the cm 300 - I own and have dismantl=
ed a few. it is a very good all round microphone, with low noise. input sen=
sitivity is dependent on battery voltage, and it needs an unusual cylindric=
al nine volt battery. I used to make mine out of rechargeable button cells =
used in older computer motherboards. The cm 300 has a transformer output, w=
ith a standard xlr male termination.
> =A0
> you can in fact use it balanced into a mixer. or unbalanced=A0 with a qua=
rter inch jack (into a Sony TCD5M cassette recorder), an XLR pair to stereo=
1/8 inch jack (to a WMD6 and later a minidisc recorder). I guess you can w=
ire it to any unbalanced input if you have the right jacks. . you should ha=
ve no trouble wiring pin 2 to tip and 1 and 3 to shield. if you are using a=
standard 3 pin 1/8 in jack, you have the option of connecting both pins of=
the jack to the pin 2 connection to get dual mono. with a four pin jack th=
ere are unfortunately a few variations. my suggestion would be to connect a=
bare jack, put on headphones, and see which pins are active. you solder th=
e wire from pin 2 (of the xlr) to them. it is likely that two of them are h=
eadphone outputs, and only one is the microphone input.
> =A0
> it is unlikely you have damaged your inputs. it is possible of course to =
cause physical damage by forcing a two pin 1/8 in jack into a 4 pin socket =
but I do not think so. and the nakamichi does not put out any output voltag=
e or draw any, so there is no possibility of damage to the electronics.
> =A0
> umashankar
> =A0
> umashankar
>
> From: Max <>
> To:
> Sent: Tuesday, August 20, 2013 6:43 PM
> Subject: [Nature Recordists] Re: Nakamichi CM-300
>
>
> Hi Umashankar,
> I was hoping to hear from you. What I need to know is, do I have to maint=
ain the wiring of the original lead (pin 2 to tip, pin 1 and 3 jumpered tog=
ether to shield), to use with my LS-10 direct?
> Cheers
> Max
>
> --- In umashankar <umashanks@> wrote:
> >
> > nakamichi cm 300 is a transformer output balanced microphone. it is 9 v=
olt battery powered, but phantom voltages will not damage it.
> > =A0
> > umashankar
> >
> > From: "brini@" <brini@>
> > To:
> > Sent: Tuesday, August 20, 2013 3:50 PM
> > Subject: [Nature Recordists] Re: Nakamichi CM-300
> >
> >
> > Max,
> >
> > I don't know this mic and haven't used an LS-10 so I'll be brief.
> >
> > The mic has an unbalanced output which means one wire is connected to
> > ground. Make sure you don't have phantom power on as this will put 48V=
> > across the input as it is no longer "phantom". Phantom power is 48V app=
lied
> > equally to both input wires with respect to ground.
> >
> > To make the mic "balanced" or "floating" which would isolate the signal=
> > wires from ground, you would need a mic transformer in circuit. Balance=
d
> > means equal plus and minus inputs and floating means these inputs have =
no
> > connection with ground.
> >
> > One way to check it out would be to wire the mic with loose lesds or
> > whatever into the live inputs without a ground connection. You will get=
hum
> > and interference but it may give a clue to whether a transcformer would=
> > help.
> >
> > David Brinicombe
> >
> >
> >
> > ------------------------------------
> >
> > "While a picture is worth a thousand words, a
> > sound is worth a thousand pictures." R. Murray Schafer via Bernie Kraus=
e.
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
> Yahoo! Groups Links
>
>
>
>
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