I built the AM BC filter that W1VLF made for one of my SDR servers as a test.
Works well, but users now can only hear/see the strongest of AM BC stations.
This is a RX only filter, not able to TX through it! I used axial-lead
inductors in mine and mounted it in a home-made box made from Copper
On 4/17/2020 6:22 AM, Joe wrote:
Is radio manufacturers that include steep filters and even attenuators
in their radios to block AM Broadcast band signals. Then advertise that
their radio covers from 50 KC to 60 Mhz!
Sorry NO IT DOES NOT!!!
It is extremely sad when a ten buck radio with
What makes me most angry?
Is radio manufacturers that include steep filters and even attenuators
in their radios to block AM Broadcast band signals. Then advertise that
their radio covers from 50 KC to 60 Mhz!
Sorry NO IT DOES NOT!!!
Yes make the filters and or attenuators but make them so
Most AM plants have been where they are for decades. I remember being
at the local 670 site several years ago. That tx site has been there
since the 1930s. This is a ~800 foot tower, now with two signals on
it, 670 and 780, each 50 KW which means the total peak power on
positive modulation is
Hi Rick,
Thanks for that - good point about Inverse chebyshev. and the toroids were dust
iron…
We’re fortunate in not having mega strong signals near the top of the MW band
here.
Jeremy
> On 17 Apr 2020, at 05:24, Richard (Rick) Karlquist
> wrote:
>
>
>
> On 4/16/2020 2:45 PM, Jeremy
On 4/16/2020 9:24 PM, Richard (Rick) Karlquist wrote:
10 dB down at 1579 kHz is not good enough for many QTH's.
I have a very strong local station at 1700 kHz,
for example, and another at 1530 kHz.
As Rick and Frank have observed, the operating frequency(ies) of the BC
stations you need to
On 4/16/2020 2:45 PM, Jeremy Maris wrote:
Make your own!
Use this site to design your filter.
http://www.iowahills.com/9RFFiltersPage.html
Attached are the values I used back in 2016 when the G4AQG FT-1000MP had
intermod problems with a new Beverage.
I built a 9 pole Chebyshev high pass
What RX loop to do have?
73! Mark KA6WKE
Website: https://www.ka6wke.net
On Thu, Apr 16, 2020, 11:34 Edward via Topband
wrote:
> Greetings,
>
> I am getting clobbered by a local BCB transmitter, making 160M unusable,
> even with a dedicated RX antenna.
>
> As for filters, I have narrowed it
Yeah a few of my earlier videos are used to cure insomnia. I'm still trying
to figure out my niche.
73! Mark KA6WKE
Website: https://www.ka6wke.net
On Thu, Apr 16, 2020, 14:49 Mike Waters wrote:
> Oh sure! I was just trying to say that some of your videos appear to be
> worth my time to
Here’s a link to the values I used, seeing as it doesn’t get through the
reflector.
http://www.g4aqg.sussex.ac.uk/9-pole-chebyshev-1500-exactvalues.tiff
Built in an evening in a diecast box with BNC sockets, dead bug construction
on single sided PCB and copper foil screening between sections.
To: donov...@starpower.net
Sent: Thursday, April 16, 2020 9:51:51 PM
Subject: Re: Topband: BCB Filter Recommendation?
Yes. I have a receive only loop. Thanks for the link. Will check it out.
> On 17 Apr 2020, at 00:49, donov...@starpower.net wrote:
>
> Hi Ed,
>
> Do you currently rou
Make your own!
Use this site to design your filter.
http://www.iowahills.com/9RFFiltersPage.html
Attached are the values I used back in 2016 when the G4AQG FT-1000MP had
intermod problems with a new Beverage.
I built a 9 pole Chebyshev high pass filter, designed with the excellent RF
filter
Nicely done, Mark. Plan to get ferrites.
> On 17 Apr 2020, at 00:46, Mark Schoonover wrote:
>
> I understand but text only would make it impossible to view the
> improvements.
>
> 73! Mark KA6WKE
>
> Latest Video: https://ka6wke.net/gmail
> Website: https://www.ka6wke.net
>
>
>
>> On
Oh sure! I was just trying to say that some of your videos appear to be
worth my time to watch. :-)
73 Mike
W0BTU
On Thu, Apr 16, 2020, 4:46 PM Mark Schoonover wrote:
> I understand but text only would make it impossible to view the
> improvements.
>
> 73! Mark KA6WKE
>
> Latest Video:
I understand but text only would make it impossible to view the
improvements.
73! Mark KA6WKE
Latest Video: https://ka6wke.net/gmail
Website: https://www.ka6wke.net
On Thu, Apr 16, 2020 at 12:26 PM Mike Waters wrote:
> This looks interesting, even though I would rather read text than watch
This looks interesting, even though I would rather read text than watch a
video. I just bookmarked it, and will watch some later. Thanks!
73, Mike
W0BTU
On Thu, Apr 16, 2020, 2:08 PM Mark Schoonover wrote:
>
> Website: https://www.ka6wke.net
>
_
Searchable Archives:
I had the same problem - 0.8 miles away from 50KW station on 760KHz. I
don't use a high pass filter on my main antenna but what I did do was wrap
as many turns as possible through a mix 76 toroid and that really knocked
down my problems. My problem was common mode on the outside of the coax.
73!
have
to be rated for 200 watts.
73
Frank
W3LPL
- Original Message -
From: "Edward via Topband"
To: topband@contesting.com
Sent: Thursday, April 16, 2020 6:34:21 PM
Subject: Topband: BCB Filter Recommendation?
Greetings,
I am getting clobbered by a local BCB transmitt
Greetings,
I am getting clobbered by a local BCB transmitter, making 160M unusable, even
with a dedicated RX antenna.
As for filters, I have narrowed it down to the ICE and the Kiwa. Kiwa seems to
be the more serious filter, as they publish their specs in great detail. ICE
does not.
Any
19 matches
Mail list logo
