| |
PA2AGA > HDDIG 01.01.00 04:37l 244 Lines 7725 Bytes #-9631 (0) @ EU
BID : HD_99_324E
Read: DL6KCF GUEST
Subj: HamDigitalDigest 99/324E
Path: DB0AAB<DB0SL<DB0FSG<OE7XWR<DB0SHG<DB0SM<PI8DAZ<PI8GCB<PI8WNO<PI8HGL<
PE1NMB<EA7URC<PE0MAR<PI8VNW
Sent: 991231/2156Z @:PI8VNW.#ZH2.NLD.EU #:40314 [HvHolland] FBB7.00g $:HD_99_32
From: PA2AGA@PI8VNW.#ZH2.NLD.EU
To : HDDIG@EU
Received: from pa2aga by pi1hvh with SMTP
id AA27391 ; Fri, 31 Dec 99 20:31:08 UTC
Received: from pa2aga by pa2aga (NET/Mac 2.3.67/7.5.3) with SMTP
id AA00017371 ; Fri, 31 Dec 99 17:33:32 MET
Date: Fri, 31 Dec 99 17:19:10 MET
Message-Id: <hd_99_324E>
From: pa2aga
To: hd_broadcast@pa2aga
Subject: HamDigitalDigest 99/324E
X-BBS-Msg-Type: B
> >
> > Most people use one of the channels of the sound card's LINE INPUT and
do
> > NOT use the sound card's mic input for good reason.
> >
> > IN ANY EVENT, EVEN IF one is going to connect a cable from a Radio's
audio
> > output to the Computer's sound card LINE INPUT, I strongly suggest that
one
> > uses a STEREO connector and ONLY use the centre ring which carries the
> > audio to the sound card and the lower ring for the mic ground return.
> >
> > DO NOT USE the TIP of the connector. Leave it unconnected!
> >
> > This is the best approach! If you accidentally plug this cable into the
MIC
> > jack of the sound card instead of the LINE INPUT, you will not cause any
> > damage to your sound card! In fact, the cable will even work and
provide an
> > audio signal from the radio to your sound card!
> >
> > (If you don't follow this recommendation, you MIGHT damage your sound
card.
> > It depends on whether your sound card has any short circuit protection
etc)
> >
> > 73's
> > Rob
> > VA2FB
>.
------------------------------
Date: 24 Dec 1999 00:17:55 GMT
From: Hamish Moffatt <hamish@rising.com.au>
Subject: Connecting sound card to Computer
In rec.radio.amateur.digital.misc Rob K. <NoEmail@Pse.com> wrote:
> But as you pointed out many mic input jacks have preamplifiers which can
> distort the signal. Fortunately, many sound card mixer programs (or other
> programs on your Windows Control Panel) have the option to TURN OFF the mic
> preamplifier which I highly recommend!
Excellent advice. I was not aware that you could usually turn these off.
In W98, I can see an advanced option called "Microphone Gain Control"
(on or off) which might be it.
> Many thanks for raising the mic preamplifier issue!
Cheers
Hamish
--
Hamish Moffatt Mobile: +61 412 011 176 hamish@rising.com.au
Rising Software Australia Pty. Ltd. http://www.risingsoftware.com/
Phone: +61 3 9894 4788 Fax: +61 3 9894 3362 USA: 1 888 667 7839
>.
------------------------------
Date: 25 Dec 1999 22:09:44 GMT
From: Hamish Moffatt <hamish@rising.com.au>
Subject: Connecting sound card to Computer
In rec.radio.amateur.digital.misc Bob Lewis <aa4pb@erols.com> wrote:
> Do the sound card mike preamplifiers distort the signal even if you
> don't overdrive them or are you saying it's best not to use them
> because they are easy to overdrive? If the sound card design is that
The latter. I've never tried to work with them.
Hamish vk3sb
--
Hamish Moffatt Mobile: +61 412 011 176 hamish@rising.com.au
Rising Software Australia Pty. Ltd. http://www.risingsoftware.com/
Phone: +61 3 9894 4788 Fax: +61 3 9894 3362 USA: 1 888 667 7839
>.
------------------------------
Date: Sun, 26 Dec 1999 19:30:07 -0500
From: Gary Coffman <ke4zv@bellsouth.net>
Subject: Connecting sound card to Computer
On Sat, 18 Dec 1999 20:29:33 -0500, "Bob Lewis" <aa4pb@erols.com> wrote:
>> I also heard if you just used a mono plug for the sound card's line
>output
>> (or speaker output), it will short out one of the channels and may
>cause
>> distortion. It is best to use a stereo plug and only use one of
>the
>> channels. Is this good advice?
>
>Good advice! A mono plug will short one output. It may not cause
>distortion in the other channel, but it's never good practice to
>short an output unless you know for sure that the circuit design can
>handle it.
It blew the sound chip on my card when I accidently did this.
Gary
Gary Coffman KE4ZV | You make it |mail to ke4zv@bellsouth.net
534 Shannon Way | We break it |
Lawrenceville, GA | Guaranteed |
>.
------------------------------
Date: Tue, 21 Dec 1999 08:30:08 -0500
From: Chris Smolinski <csmolinski@erols.com>
Subject: Connecting sound card to Computer
Apple avoided this problem by using a modified (longer) plug for the
microphone. The DC power is at the tip, but since the jack is designed
for a longer plug, a normal plug won't reach it. The center ring is
longer, and connects to both left and right channels, for blended mono
recording. Yet a stereo plug could also be used, for true stereo
recording.
73's
Chris
N3JLY
Rob wrote:
>
> IMPORTANT -- CORRECTION -- PLEASE READ
>
> The mic jack on a sound card is a MONO circuit but uses a STEREO JACK with
> one channel carrying the audio to the sound card from the mic and the other
> channel carrying a DC voltage to power a mic.
>
> I made a big mistake. THE TIP OF THE MIC CONNECTOR CARRIES THE DC NOT THE
> AUDIO AS I SUGGESTED IN MY LAST POSTING!
>
> Most people use one of the channels of the sound card's LINE INPUT and do
> NOT use the sound card's mic input for good reason.
>
> IN ANY EVENT, EVEN IF one is going to connect a cable from a Radio's audio
> output to the Computer's sound card LINE INPUT, I strongly suggest that one
> uses a STEREO connector and ONLY use the centre ring which carries the
> audio to the sound card and the lower ring for the mic ground return.
>
> DO NOT USE the TIP of the connector. Leave it unconnected!
>
> This is the best approach! If you accidentally plug this cable into the MIC
> jack of the sound card instead of the LINE INPUT, you will not cause any
> damage to your sound card! In fact, the cable will even work and provide an
> audio signal from the radio to your sound card!
>
> (If you don't follow this recommendation, you MIGHT damage your sound card.
> It depends on whether your sound card has any short circuit protection etc)
>
> 73's
> Rob
> VA2FB
>.
------------------------------
Date: Sat, 25 Dec 1999 10:08:09 -0500
From: "Bob Lewis" <aa4pb@erols.com>
Subject: Connecting sound card to Computer
Do the sound card mike preamplifiers distort the signal even if you
don't overdrive them or are you saying it's best not to use them
because they are easy to overdrive? If the sound card design is that
poor, doesn't it call into question the remainder of it's audio
chain? On one setup I have a very low audio output and use the mike
input. I've not noticed any problem but of course that's a sample of
only one sound card and others could perform quite differently.
>.
------------------------------
Date: Sat, 18 Dec 1999 11:43:03 -0600
From: Richard Kriss <kriss@spec.com>
Subject: CQ NET/Mac iMac User de KD5VU
---- correction with right address -----
The subject almost says it all. I would like to talk to anyone that has
been able to run NET/Mac on an iMac or any Mac with a USB port. Please
contact Dick, KD5VU using kd5vu@ausgw.n5smn.ampr.org
>.
------------------------------
Date: Tue, 28 Dec 1999 07:04:23 -0500
From: wd1v@amsat.org
Subject: CW Over the Net?
Is there software that creates a "Virtual CW Transceiver" that
would let folks send & receive CW over the net? Sort of like
Instant Messaging but using their space bars as straight keys
or other keys as a paddle?
This could be a great way of advancing interest in CW and giving
people actual practice, real thrills from actual contacts, and
foster more interest using the medium of the day.
73
((( \
\x 0__~\
\x_\@_^\__*)
O \o
John Seney, WD1V [FN42]
http://www.qsl.net/wd1v
Manchester NH 03103 USA
FISTS #5014 QRP Macnet
FAQ Host Radio & Scopes
>.
------------------------------
Date: Mon, 27 Dec 1999 19:45:19 +0100
To be continued in digest: hd_99_324F
Read previous mail | Read next mail
| |
