The PMD660 is one I am looking at, what I read about it said that it
is not designed to use CF cards bigger than 1gb, that may be the
reason the noise went away with the smaller card. I dont know what
the manual says, I am just repeating what I have read so it could be
wrong.
Tony Greif.
--- In wrote:
>
> Interesting exchange recently on another list, which I thought may
have
> interest for the people investigating the noise floors of inputs on
CF recorders:
>
> Subject: PMD 660 incompatibility
>
>
> We received 3 Marantz PMD 660's for our reporters a little while
ago. I
>
> also purchased 3 Kingston 2GB flash cards to go with them. The
Kingston
>
> cards don't mix with the recorder! Every time the recorder sends
out a
>
> write burst to the flash card, the mic amps pick up a chirp. I
popped in
>
> the cheap 64 MB card that came with the recorder (Renesas) and the
>
> problem went away.
>
> Have you noticed this chirp problem? (It's noticeable in the mud
about -30 dB
> with the pots wide open.)
>
> -----Later message:
>
>
> I spoke with the folks at Kingston. They were actually very
helpful. The
>
> particular cards I had use a Sanyo controller chipset. Kingston
>
> apparently also produces their cards using several other chipsets.
They
>
> are sending me replacements with another chipset no questions
asked. If
>
> that doesn't work, they said they would refund me, even though they
had
>
> no clue about flash cards being used in audio recorders. Now that's
a
>
> good company!
>
>
> My previous flames towards Kingston were a bit premature. The
>
> frustration factor is near 100% today after locking myself out of
my
>
> office.
>
>
> Thanks for everyone's advice, If the replacement cards they send
don't
>
> work I'll look into some of your suggestions.
>
>
> - Tom
>
>
> Hi Tom,
>
>
> My guess is the large capacity Kingston cards draw a bit too much
peak
>
> current when writing and the mic pre-amps are being driven by the
same power
>
> source. So the cross-talk noise probably isn't the fault of the
memory card
>
> but is an inadequately decoupled pre-amp power supply in the
Marantz. You
>
> should complain to Marantz and let their R&D folks improve their
product.
>
>
> --Ira
>
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