[ICOM] IC756 Pro III Filters

[Mark K3MSB]

First thing I tried.    I know the LED on the switch functions as I can
adjust any of the filters and the LED goes on;  pushing the PBT Clear
causes the LED to go off and the same bottom of the barrel audio to be
heard.

Mark K3MSB

On Fri, Sep 30, 2016 at 11:21 AM, Mike McCarthy, W1NR <lists at w1nr.net>
wrote:

> Clear the twin passband tuning? (PBT Clear)
>
> Mike, W1NR
>
> On 09/30/2016 10:54 AM, Mark K3MSB wrote:
> > Hello
> >
> > I've owned my radio for quite a few years (purchased new) and it's worked
> > without issue.
> >
> > Recently, I noticed that when I go to the 500 and 250 Hz filter settings
> on
> > CW,  the audio is like what you'd hear in the bottom of a barrel.
> >
> > Prior to this, when switching between the 1.2 Khz,  500, and 250 Hz
> filter
> > settings while copying a signal,  the signal was always centered.   Now,
> > for the 500 and 250 positions I have to adjust the main tuning slightly,
> > and the signal is not sharp and distinct.
> >
> > I've performed a reset on the radio which did nothing.
> >
> > Now, a few weeks ago during an electrical storm I heard a "pop" from the
> > radio bench.   All antennas were (of course) physically disconnected.   I
> > forgot to remove the power plug from the outlet strip, but the strip was
> > turned off.     Afterwards, as is currently the case,  aside from the
> > filter issue,  the radio works fine.
> >
> > Any ideas?
> >
> > Thank you
> >
> > Mark K3MSB
> > ----
> > Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/
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> >
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>