[WriteLog] MMTTY plug in problem

Wed Mar 1 00:11:19 EST 2006

Interesting! My plugs on both input and output are mono, not stereo.  I'll
have to scrounge around in the junk box and find some stereo ones and give
that a go.  Thanks for the heads up.
Gary AL9A

----- Original Message ----- 
From: "David Hachadorian" <k6ll at adelphia.net>
To: <writelog at contesting.com>
Sent: February 28, 2006 5:27 PM
Subject: Re: [WriteLog] MMTTY plug in problem

> Here's something to check. The mic input jack is a monaural
> input, but it requires a stereo plug, with audio on the tip,
> and shield on the shell. There should be no connection to
> the ring. There is a dc voltage on the ring that is used to
> power electret mics, such as the usual computer mics. You
> cannot connect a mono plug to the mic in jack. The plug has
> to be a stereo plug, even though the ring is not used.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
>
> ----- Original Message ----- 
> From: "Gary Senesac AL9A" <al9a at pobox.mtaonline.net>
> To: "Writelog Reflector" <writelog at contesting.com>
> Sent: Tuesday, February 28, 2006 10:38 PM
> Subject: Re: [WriteLog] MMTTY plug in problem
>
>
> > Charlie,
> > Computer is a Compaq Presario laptop running WinME.  I
> > seriously doubt the
> > problem is the sound card driver, as the card works fb on
> > PSK31, CW, and
> > SSB.  It also works without a problem on the MMTTY stand
> > alone software.  It
> > is only when running the MMTTY plug in with WL that the
> > card apparently gets
> > overloaded and desensed.
> >
> > I've played with it a bit more today, with no success.  I
> > feed the receive
> > audio to the MIC IN of the soundcard from the fix audio
> > output pin on the
> > ACC1 jack on the back of my IC-756PRO.  Because this is
> > generally too much
> > audio for the card I first route it to a Radio Shack
> > stereo mixer where I
> > can use a slider control to adjust the output going to the
> > soundcard.  When
> > testing the differences between MMTTY stand alone and
> > MMTTY plug in I notice
> > that the MMTTY stand alone will take significantly more
> > audio input from the
> > mixer than MMTTY plug in will before the Overflow
> > indicator comes on.
> > Again, no clue why that would be.
> >
> > After transmitting with MMTTY plug in for WL, the spectrum
> > display
> > continuously displays Overload, the tuning indicator is
> > just a blob of white
> > dots and the audio wave indicator remains relatively flat
> > never showing the
> > mark and space peaks for tuning.  I suspect RFI of some
> > sort, but darned if
> > I can understand why one program is immune and the other
> > goosey!  I tried
> > putting more turns on the torrid core on the input line to
> > the soundcard
> > ,but it didn't make any difference.  I will have to
> > scrounge up more torrids
> > and ferrite bars out of the junk box and trying adding
> > more chokes on the
> > audio out to the radio too I guess.  I know AA5AU's
> > tutorial mentions RFI
> > problems on RTTY so I suspect this is going to take some
> > time to correct
> >
> > Now to get ready for the SSB test this weekend.  Hopefully
> > there won't be a
> > problem with that now too!  Murphy lives!
> > Gary AL9A
> >
> > ----- Original Message ----- 
> > From: "Charles Morrison" <cfmorris at bellsouth.net>
> > To: <al9a at pobox.mtaonline.net>
> > Sent: February 26, 2006 8:33 AM
> > Subject: RE: MTTY plug in problem
> >
> >
> >>
> >> Gary,
> >>
> >> What type of computer are you using?  Is this a homebrew
> >> or "built" one,
> > or
> >> is this a store bought box like Dell or Gateway?  The
> >> important thing is
> > the
> >> soundcard.. Is it stock or is it an addon?  The reason I
> >> ask is because I
> >> fought similar problems with my "built" computer using an
> >> OEM soundcard
> > that
> >> I bought on Ebay.  There were no drivers for it, and
> >> although for playing
> >> windows sounds and such, generic Microsoft Drivers
> >> worked, I found that
> >> there were strange problems when I hooked the radio to
> >> it.  Investigation
> >> with the serial number turned up several possibilities,
> >> but the FCC id
> > gave
> >> me the manufacturer (Creative) which wasn't stamped on
> >> the card.
> >>
> >> >From there, futher digging on the Creative site found me
> >> >the correct
> > driver,
> >> which I used to replace the Microsoft driver and things
> >> worked fine.  With
> >> the MS Driver I found:
> >>
> >> 1.  Audio input was present regardless of if I used the
> >> Line In or the Mic
> >> In, and chose either one in the audio panel.  IE: I could
> >> plug the radio
> >> into Line In, and in the sound panel on the computer
> >> choose Mic but I
> > still
> >> had audio.
> >> 2.  There was a weird "residual" noise, whereby I had
> >> audio showing up
> > even
> >> if the rig was turned off, NOISE!
> >> 3.  Level settings didn't seem to work correctly.  I
> >> could turn the inputs
> >> all the way down and still have audio present in MMTTY.
> >> This is what
> > really
> >> blew my mind.
> >>
> >> Changing the driver fixed this permanently.  Now, if Im
> >> plugged into the
> >> Line In and select Mic, the waterfall and such in MMTTY
> >> goes to a "dot",
> > no
> >> audio present.  The inputs work correctly as well.
> >>
> >> I dug around on Google with the Model number printed on
> >> the card, used the
> >> FCC website to ID the card definitely by its FCC ID, and
> >> then found the
> >> correct drivers on Creative's site.
> >>
> >> Charlie
> >> KI5XP
> >>
> >>
> >>
> >> > Message: 3
> >> > Date: Sat, 25 Feb 2006 13:06:23 -0900
> >> > From: "Gary Senesac AL9A" <al9a at pobox.mtaonline.net>
> >> > Subject: [WriteLog] MTTY plug in problem
> >> > To: "Writelog Reflector" <writelog at contesting.com>
> >> > Message-ID: <003f01c63a57$b765b6a0$6401a8c0 at presario>
> >> > Content-Type: text/plain; charset="iso-8859-1"
> >> >
> >> > Way too late to get started on this, but I've been
> >> > trying to
> >> > run the NA QSO Party RTTY edition using the MMTTY plug
> >> > for
> >> > WL.  At first my problem was no receive in MTTY.  The
> >> > band
> >> > scope remained unchanged no matter where I tuned, the
> >> > waterfall didn't work and the tuning indicator also
> >> > wouldn't work.
> >> > Fiddled around a bit and tried changing the sound card
> >> > buttons from Mono to Left to Right.  Finally got the
> >> > sound
> >> > card to wake up and got receive going.
> >> > However, whenever I transmit, 100W, and go back to
> >> > receive
> >> > the I'm back to no receive!  Clicking on the sound
> >> > board
> >> > buttons again restores it.
> >> > Transmit and it dies!
> >> >
> >> > My first suspicion was RF getting back into the sound
> >> > card,
> >> > but I already have a big torrid choke on the line in
> >> > and RF
> >> > feed back is not a problem on either CW or SSB.  I shut
> >> > down
> >> > WL and fired up MMTTY stand alone.  Receives and
> >> > transmits
> >> > just fine.  No problem switching back from transmit to
> >> > receive.  Why would the stand alone work OK and the
> >> > plug in
> >> > be a brick???
> >> > Same hook up for both so I'm thoroughly stumped.  Any
> >> > suggestions gratefully accepted.
> >> > Gary AL9A
> >> >
> >> >
> >> >
> >>
> >
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