[WT-support] Problems with Windows 7 and MK2R+

[Bob Wilson, N6TV]

First, I don't understand what "brum" means.  Distortion or hum?  RF
feedback?

There are several ways to use the MK2R+'s sound cards with Win-Test.  You
can configure it as a Windows sound card and use the Win-Test "Internal
sound card DVK", or you can configure it as an external DVK controlled by
LPT pins or the microHAM control protocol.  Which method are you using?  Did
you try the other method?

If you record and play back a message using the Router's DVK tab, does it
sound any better?

Are you using an older, unmodified Elecraft K3?  There are known RFI issues
with the front panel mic. jack on that radio, especially if you use a mic.
plug originally wired for a Kenwood.

So far all of the problems you have described sound like microHAM Router /
device driver / CODEC software issues, or maybe mic. plug issues, not
hardware problems with the laptops.  You shouldn't be using the laptop's
sound card for anything if you have an MK2R+; the laptop hardware is
probably not the issue unless you have a bad USB hub or something.

You might also try disabling any AntiVirus "auto protect" features to see if
that is causing problems with USB I/O.

73,
Bob, N6TV

On Sun, Oct 17, 2010 at 8:17 AM, Toni Lindén <oh2ua at oh2u.com> wrote:

> After some more investigations, looks like it's not Win7 or Vista
> issue but issue with new laptops...
>
> After uninstalling Win 7 from laptop and replacing it with XP, same
> problems appears still.
>
> So far the same problems (audio brum and misbehave of audio codes)
> have appeared with Fujitsu lifebook P3110 and two individual Lenovo
> T61 laptops. All of those laptops are only a couple of months old. So
> maybe there's been some changes USB-devices of laptops?
>
> 73 de Toni, OH2UA
>
>
> 2010/10/17 Toni Lindén <oh2ua at oh2u.com>:
> > Hi!
> >
> > I know this is not Win-Test related issue, but hope to have some help
> this way.
> >
> > We're trying to get MK2R+ and Windows 7 work together, but there's
> > some issues we haven't been able to deal with. We have latest router
> > version and MK2R+ FW. The exactly same setup works perfect with Win
> > XP. We're actually having XP and Win 7 computers here side by side
> > just to make sure that this really seems to be Win 7 related issue.
> > Also the same problems we're having with Win 7, does appear in Windows
> > Vista computer:
> >
> > 1) Bad TX audio quality in MK2R+ voice keyer.
> > - When recording the voice message, there's always audio brum in
> > recording. Even if mic is disconnected from MK2R+, there's clearly
> > audible brum making recording quality bad. This problem does not
> > appear with XP.
> > - Things we've tried do far to make audio sound better:
> > * removed all audio effects from USB audio and Voice codec
> > * set audio levels from Win7 according to microHam manual
> > * tried with different recording quality settings from Win7
> >
> > 2) Every once in a while router have lost the audio codecs.
> > - The codecs are still visible in router, but no recording or playback
> > are possible. If one press the rec or playback button, light in button
> > just flash but no recording or playback begins. Also everything else
> > seems to be working OK, like radio control or winkey. Removing the
> > USB-cable and plugging it back makes things work again.
> > - What we've done so far:
> > * Removed computer own power manager SW to let Windows take care of
> > all power control
> > * Disabled all USB-power saving options
> > * Checked all BIOS settings for USB
> > * Disabled all other software or processes that may try to use
> > USB-audio or -voice codecs.
> >
> >
> > Have anyone else noticed anything similar with Win 7 (or Vista)? As
> > said, everything works in XP...
> >
> >
> > 73 de Toni, OH2UA
> >
>
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