[ICOM] IC756 Pro III Filters

[Mike McCarthy, W1NR]

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
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