Problem transmitting with IC765 using beverage

reisert at reisert at
Sun Oct 22 19:09:02 EDT 1995

I need help!  W1JR has a bad problem with his IC765.  When he has the
beverage switched in on 80 meters, his transmit power drops to
nothing.  It soulds like the beverage is being overloaded, and it's
coupling in to the radio, shutting down the transmitter somehow.
Anyone solved this problem?

Thanks - Jim AD1C
reisert at

>From H. Ward Silver" <hwardsil at  Sun Oct 22 23:24:47 1995
From: H. Ward Silver" <hwardsil at (H. Ward Silver)
Date: Sun, 22 Oct 1995 15:24:47 -0700 (PDT)
Subject: JOTA
Message-ID: <Pine.3.07.9510221546.I12892-9100000 at>

Yep, all I could hear (and understand) was the other contesters.  Worked
W0CP with a handful of Webelos Cubs.  The 14-year-old in W0CP's shack was
mighty impressed to hear that the ski mfr. K2 is here on Vashon Island and
that one of guy's dad worked there.  They wanted to know all about the
antennas and see QSL cards, etc.  Fun!

73, Ward N0AX

>From H. Ward Silver" <hwardsil at  Sun Oct 22 23:31:28 1995
From: H. Ward Silver" <hwardsil at (H. Ward Silver)
Date: Sun, 22 Oct 1995 15:31:28 -0700 (PDT)
Subject: Broadcast Filter
Message-ID: <Pine.3.07.9510221528.K12892-b100000 at>

I've discussed my overload problems on 160 (and with any serious antenna
on 80 or 40) from the numerous local BC'sters.  I just got a BC reject
filter from Kiwa Electronics (kiwa at and let me tell you, it
does the job.  My overload level is 50dB over S9 and even some attenuation
and series traps can't get rid of it completely, without getting rid of
the signals in-band, too.  I popped this little box in the RX ANT loop on
the FT-990 and was thrilled to find the overload spanked down to the
expected S3-5 local noise level.

It also cleaned up a multi-station spur at 3550 and eliminates BC coming
down the line from the 40-2CD from upsetting the SWR-shutdown circuitry in
the amplifier output.  It slices, it dices...

The filter is in a die-cast aluminum box about 2x2x1.5 with PL-259s.  A
short 2xPL-259 is provided (nicely soldered, too).  The filter will NOT
handle the TX output; it's strictly receive-only.  Kiwa sells primarily to
the SWL/BC DXer, thus the no-TX design.  Attenuation of 1.8-2.0MHz signals
is <3.0dB.  BC signals below 1.6MHz are attenuated >60dB.  Total cost is
$60+$4 shipping.  Not a bad deal at all.

73 and CQ-160...

Ward N0AX

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