Rather than use a filter capable of handling the transmit power, surely a
better solution for the K3 would be to use a separate 160m receiving antenna,
via a small filter on the BNC auxiliary antenna input.
73
Tom G3OLB
_
Topband Reflector Archives -
Has anyone used this High Pass Filter ?
http://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html
I found I have a 25KW AM 1520 Khz BC transmitter 12 miles from me , is
that close enough to interfere with me receiving weak signal DX on the
top Band ? I do hear some wide band hash
:50 AM
Subject: Topband: BCB interference ?
Has anyone used this High Pass Filter ?
http://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html
I found I have a 25KW AM 1520 Khz BC transmitter 12 miles from me , is
that close enough to interfere with me receiving weak signal DX
Hi Ed!
I've got a 1650 KHz 10 KW station about six miles away.
I am using a Clifton Laboratories Z10022A high pass filter for 160
meter reception. Works great and very reasonable price.
http://www.cliftonlaboratories.com/current_products.htm
Z10022A Medium Wave High Pass Filter
The
Hi Ed!
I've got a 1650 KHz 10 KW station about six miles away.
I am using a Clifton Laboratories Z10022A high pass filter for 160
meter reception. Works great and very reasonable price.
http://www.cliftonlaboratories.com/current_products.htm
Z10022A Medium Wave High Pass Filter
The
Solutions might have a transmit HPF now but I have not
looked into it.
73 Hardy N7RT
- Original Message - From: Ed Stallman n...@airmail.net
To: TopBand List topband@contesting.com
Sent: Monday, September 22, 2014 6:50 AM
Subject: Topband: BCB interference ?
Has anyone used
On Mon,9/22/2014 7:07 AM, Hardy Landskov wrote:
The catch is it has to be able to handle the transmit power too.
Not if you put the filter in the RX loop. That feature is part of the
KXV3 and KXV3A modules.
Also, many AM broadcast stations are licensed for a lot less power at
night than
Bill,
The HPF article was in QST, Feb 1978, p. 22.
Hardy
- Original Message -
From: Bill Wichers bi...@waveform.net
To: Hardy Landskov n...@cox.net
Sent: Monday, September 22, 2014 8:57 AM
Subject: RE: Topband: BCB interference ?
Do you have a link to that W3NQN article? I'm only
See also http://www.arraysolutions.com/Products/bcb_filters_top.htm and
http://arraysolutions.com/Products/bcb_filters_top1.htm .
73, Jim N7US
-Original Message-
Ed,
I have the same problem. A 25KW station at 1560 KHz just destroys the front
end of my K3. Elecraft did not do a vey good
I had a local BC station start to produce spurs that overloaded an external
preamp for my full size RX flag. The Array Solutions W3NQN RX filter did the
job. I tried an Array Solutions AS-402 BCB High Pass Filter but it doesn’t have
the brick wall response of the W3NQN design. For all I know,
On 9/22/2014 9:42 AM, Jim Brown wrote:
On Mon,9/22/2014 7:07 AM, Hardy Landskov wrote:
The catch is it has to be able to handle the transmit power too.
Not if you put the filter in the RX loop. That feature is part of the
KXV3 and KXV3A modules
73, Jim K9YC
Does this allow me to listen on
It operates like a send/return loop. You can toggle the signal routing from the
front panel to either use the external device or not. I know for a fact it will
work for the transmit antenna since that's what I use it for, but as far as I
know it can be used for *any* external antenna, but not
On Mon,9/22/2014 6:50 AM, Ed Stallman wrote:
Has anyone used this High Pass Filter ?
http://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html
The spec for this filter is ambiguous. Is the -40dB at all frequencies
below 1.6 MHz, or at 1 MHz? BIG difference. OTOH, the Dunestar
On Mon,9/22/2014 11:09 AM, Richard (Rick) Karlquist wrote:
On 9/22/2014 9:42 AM, Jim Brown wrote:
On Mon,9/22/2014 7:07 AM, Hardy Landskov wrote:
The catch is it has to be able to handle the transmit power too.
Not if you put the filter in the RX loop. That feature is part of the
KXV3 and
Date: Mon, 22 Sep 2014 11:21:29 -0700
From: j...@audiosystemsgroup.com
To: topband@contesting.com
Subject: Re: Topband: BCB interference ?
On Mon,9/22/2014 6:50 AM, Ed Stallman wrote:
I found I have a 25KW AM 1520 Khz BC transmitter 12 miles from me ,
is that close enough
Subject: Re: Topband: BCB interference ?
On Mon,9/22/2014 6:50 AM, Ed Stallman wrote:
Has anyone used this High Pass Filter ?
http://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html
The spec for this filter is ambiguous. Is the -40dB at all frequencies
below 1.6 MHz, or at 1 MHz
I have a 50 KW station on 1530, eight miles north of me. They have a six
element in-line array aimed south at Mexico... and me. They tore up every
rig I've had in the shack until I went to a K3. We have two K3s and have no
problem on either of them with BCB other than weak birdies on 1820
: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Chuck
Hutton
Sent: Monday, September 22, 2014 3:22 PM
To: topband@contesting.com
Subject: Re: Topband: BCB interference ?
Their description (to me at least) indicates an elliptic filter with a
stopband peak of -40 dB at 1 MHZ and ranging
I have a three-frequency 2.7KW BC station that is 350 yards from the
base of my 160m vertical.
The NQN BCB filter knocks out all problems - well except for the 2nd
harmonic of the 945KHz feed which sometimes turns up for a day or so.
I can't think of a single reason not to try one if you
On Mon,9/22/2014 5:51 PM, ch...@g3svl.com wrote:
I can't think of a single reason not to try one if you have BCB, they
are cheaper than almost any rig accessory you're likely to buy!
Their effectiveness will depend entirely on the frequencies within the
BCB you are trying to suppress. 945
PM
Subject: Re: Topband: BCB interference on 160
The problem would be that you need to trap out the BC signals BEFORE they
reach the tuning diodes. In the good ole days with signals that were no
more powerful than now, a small antenna, a coil, capacitor, and a diode
would produce enough
On 9/15/2011 6:58 AM, ZR wrote:
Some loops have such poor Q that they are wide open to interference
problems. The hardline I chose has the lowest C per foot and therefore the
highest Q with the resultant narrow bandwidth and need to retune for even a
small QSY. The preamp is very helpful and
Excuse me but dielectric loss is what determines Q and in this case it
is synonomous with capacitance. Conductor loss is lower also.
Dielectric loss of polyethylene coax at HF is negligible.
A lower dielectric constant does reduce conductor losses, so lower
capacitance corresponds to lower
Hi all,
I recently built a sheilded RX loop for 160 per N6RKs Contest Jouranal artical.
It is diode tuned and covers about 1.5-4 mhz. I am hearing two AM radio
stations on 1830 khz.
They are 640 and 1190 combined. 640 is a 50KW station about 12 miles east and
1190 runs about 1.5 kw at night.
The problem would be that you need to trap out the BC signals BEFORE they
reach the tuning diodes. In the good ole days with signals that were no
more powerful than now, a small antenna, a coil, capacitor, and a diode
would produce enough rectified audio to drive a pair of headsets WITHOUT any
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