Hi Rick,
I would also think that peak radiation angle of the RX antenna versus the
arrival angle of the desired signal is also a big variable that would not
allow the relationship you heard on the webinar to be true under all
conditions. As you said it probably is too much of a generalized
statem
In this webinar, it was asserted (without explanation) that
for every 1 dB increase in RDF, you get 1.5 to 2.0 dB
improvement in S/N ratio. I've never heard that before
and don't even see how it makes sense. Actually, I don't
even know how you can make generalizations like that
unless you are de
Consider making your own filters
-Original Message-
From: Roger White
Sent: Thursday, March 03, 2016 10:59 AM
To: topband@contesting.com
Subject: Topband: BCB High Pass Filter
Anyone have a BCB High Pass Filter that they would recommend? Seems like
there were a number of sources for t
I noticed a bit of BC inter-mod so built a 9 pole Chebyshev high pass filter
dead bug style in a small diecast box with some internal screening made from
double sided pcb stock. I designed it with the excellent RF filter design
package from Iowa Software, and used an LC meter to get the capac
> Mike - I agree the objective, but the reality is a little harder!
>
> The 160 allocations across Europe, for example, vary widely. 1800-1810 is
not generally part of the allocated spectrum. Various countries have various
parts of the band with varying power privileges (you'll have seen
http://www
Hi Roger,
if you would not like to waste money then look and build this filter:
http://www.ok1rr.com/index.php/technical-topics/40-an-efficient-mw-band-stop-filter
73 - Petr, OK1RP
http://ok1rp.blogspot.com
http://160mband.blogspot.com
On Thu, Mar 3, 2016, at 05:46 PM, Roger White wrote:
> Ev
Sorry, that article is for the TX BPFs
W3NQN receive BPFs are in the July/Aug 1999 issue of QEX.
On 03/03/2016 01:54 PM, Eric NO3M wrote:
Ed published a two (2) part article in May / June 1998 QST that
discusses the design background (available in ARRL QST archives).
_
Concur; the plug-in filters at the bottom right of the signal
conditioner photo I sent earlier are homebrew BPFs based on W3NQN design
criteria. Ed published a two (2) part article in May / June 1998 QST
that discusses the design background (available in ARRL QST archives).
The ones I built a
Ok, very nice filter! Thanks!
Roger White
Murphy, TX
> On Mar 3, 2016, at 11:35 AM, donov...@starpower.net wrote:
>
> Hi Roger,
>
> The inexpensive 160 meter W3LPL receive only bandpass filter
> provides more then 20 dB rejection at 1700 kHz, more than 30 dB
> below 1600 kHz, more then 40 dB be
I highly recommend the Array Solutions W3NQN BCB.
I had a local BC station a few miles away developed problems resulting in IMD
with an external preamp ON connected to a flag that rendered 160 unusable.
The W3NQN BCB completely fixed the issue. Notified but I’ve no idea if the
offending BC stat
On Thu,3/3/2016 10:12 AM, Jay Terleski wrote:
We sell allot of them.
Jay, WX0B
The W3NQN-designed filters that Jay sells are excellent.
73, Jim K9YC
_
Topband Reflector Archives - http://www.contesting.com/_topband
Everyone, thanks for the info. I really only need a Rx only filter.
Roger since your nearby, common down and try one out.
http://arraysolutions.com/Products/AS160HPF.htm
We sell allot of them.
Jay, WX0B
Jay Terleski
President
Array Solutions
214 954 7140
On Thu, Mar 3, 2016 at 11:00 AM, wro
That mirrors my experience. I've also got a pair of the ICE BCB receive
only filters and would only recommend them if you don't need very deep
attenuation.
73, Barry N1EU
On Thu, Mar 3, 2016 at 12:25 PM, Jim Brown
wrote:
> Most of the bandpass filters I reviewed and published in NCJ a few year
Hi Roger,
The inexpensive 160 meter W3LPL receive only bandpass filter
provides more then 20 dB rejection at 1700 kHz, more than 30 dB
below 1600 kHz, more then 40 dB below 1500 kHz and more
than 60 dB below 1400 kHz. Depending on the frequency of
your nearby AM broadcast station, you may n
I have one from Heros Technology in UK, bought 12 years ago, they are
still in business and have some interesting products. I checked the
filter yesterday with my VNWA and it is exactly as advertised.
Array Solutions also has a W3NQN design with better specs at the high
end of the BCB.
Gran
Most of the bandpass filters I reviewed and published in NCJ a few years
ago provide very good rejection on the AM broadcast band. The ICE
bandpass filter is the exception.
http://k9yc.com/BandpassFilterSurvey.pdf
At the end of the article there are links to response plots for each of
the fil
$28.00 for this one...
http://www.iceradioproducts.com/filtersrf.html
From: Topband on behalf of Eric NO3M
Sent: Thursday, March 3, 2016 10:09 AM
To: topband@contesting.com
Subject: Re: Topband: BCB High Pass Filter
It states on the Clifton Labs homepa
It states on the Clifton Labs homepage:
"Clifton Laboratories is no longer in business.
No products are available for sale or repair."
However, the PDF manual including the schematic for the BCB high pass
filter is here:
http://www.cliftonlaboratories.com/Documents/Z10022A%20Manual.pdf
It is
Everyone, thanks for the info. I really only need a Rx only filter. The DLWC
BCB filter looks nice.
BTW, does anyone know if Clifton Labs still in business? I thought I saw
somewhere they no longer sell products. I remember years ago they had some high
quality products.
Roger White W5RDW
Murph
I like this filter: http://www.dxengineering.com/parts/dlw-fl1718
73, Barry N1EU
On Thu, Mar 3, 2016 at 10:59 AM, Roger White
wrote:
> Anyone have a BCB High Pass Filter that they would recommend? Seems like
> there were a number of sources for these a number of years ago, but Google
> only ca
Anyone have a BCB High Pass Filter that they would recommend? Seems like there
were a number of sources for these a number of years ago, but Google only came
up with a few now.
Roger White W5RDW
Murphy, TX
_
Topband Reflector Archives - http://www.contesting.com/_topband
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