[RFI] Odd broadcast radio reception.

[kd6bzn at gmail.com]

Maybe out of band front-end overload?  The portables maybe lack filters the
countertop model has.

Talk 15: Resolving RF Interference: RF Front-end Overload Problems :
https://www.youtube.com/watch?v=zFDjdRgZi9o

Dave

-----Original Message-----
From: RFI <rfi-bounces+kd6bzn=gmail.com at contesting.com> On Behalf Of KD7JYK
DM09
Sent: Sunday, June 27, 2021 5:21 PM
To: RFI List <rfi at contesting.com>
Subject: [RFI] Odd broadcast radio reception.

Here's a strange one!  Giving the general description, in case anyone has
experienced such an occurrence.

Typical community, typical residential neighborhood.  I was talking on the
phone with a gal that has lived at the same location since 1938.  I lived on
the same street, and played radio for about 21 years.

Beginning around the first of June, she was sitting on her porch, as she
does daily, listening to a new portable AM/FM broadcast receiver a neighbor
bought for her.  It suddenly cut out.  No reception, AM, or FM bands.  No
apparent interference noises, nothing trying to come through, as she
described it, dead, just a slight background hiss, as if nothing was to be
heard at all.  Thinking her new radio had an issue, she pulled out one
another neighbor had given her several years ago, another AM/FM portable
broadcast receiver.  Same reception issue, nothing to be heard, just a
slight hiss across both the AM, and FM bands.  Thinking this odd, she pulled
out a THIRD radio, and older Radio Shack portable AM/FM model.  Same issue!
Nothing to be heard on either band, just a faint background hiss.

She did go into the house, and try a counter top AC model, about thirty feet
east of the porch, and that radio did work.

She tried all three radios on the porch repeatedly, for about two weeks,
and, about two weeks ago, suddenly all three began working again, AM, and FM
broadcast bands, as though someone flipped a switch, with no other issues
exhibited between all three portable radios, "they suddenly all started
working at the same time, and they still are, a couple of weeks later."

I gave her some pointers on comparing those four radios, and the one in her
vehicle to each other, as well as trying to determine the extent of the
issue, location-wise, and will get in touch with her later.

I have no further details at this time.  I've never experienced such a
thing.  Any speculation?

Kurt

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