[Lowfer] WEB Received in Oklahoma

[John Reed]

----- Original Message -----
From: "Jay Rusgrove" <JRusgrove@comcast.net>
To: <jreed@alum.mit.edu>
Sent: Sunday, October 19, 2003 10:25 AM
Subject: Re: [Lowfer] WEB Received in Oklahoma



> Am also using an RF-590 (as well as several HP 3586Cs and an R-75) here
but
> without the noise blanker. From your post it sounds like the noise blanker
> does a good job for you. Wonder  if you might elaborate a bit more on what
> you've found with/without the blanker and the noise situation at you
> location.
>
> Jay Rusgrove, W1VD

Without the blanker, I wouldn't be able to receive much of anything.
There's a 120 Hz spike train here that comes in through the power system.
I've looked in our house for the source, but it is outside.  Sometimes it is
really strong, and other times weaker.  It seems to be weakest during early
morinings, but even then interferes with reception greatly.

Now, on the blanker - I spent a long time trying various blankers,
synchronous and asynchronous.  Asynchronous is the way to go.  With
synchronous you spend all your time adjusting the controls.  Some of these
were written up in past issues of the Lowdown.  I thought briefly about
getting one from Harris since this is an add-on.  However the price quickly
made me forget about that option.  They wanted $2000 for the plug-in board
and documentation.  I ended up building one for the Harris.  See the
Lowdown, June 2001 and a follow up in Sept, 2002.

John Reed

>
> ----- Original Message -----
> From: "John Reed" <jreed@alum.mit.edu>
> To: "lowfer" <lowfer@mailman.qth.net>
> Sent: Sunday, October 19, 2003 10:12 AM
> Subject: [Lowfer] WEB Received in Oklahoma
>
>
> This morning I was able to copy WEB here in Shawnee, OK.  I started
hearing
> it at 1054 UTC and it faded into noise at 1115.  Frequency was 189949.8
Hz.
> Reception was with 1 meter homebrew whip antenna, Harris RF-590 receiver
> with noise blanker (absolutely necessary) and HP 3561A signal analyzer.
> Reception bandwidth was .2 Hz on a 20 Hz span around the BFO frequency.
>
> I timed the rise and fall of the signal's spectrum line, then converted to
> dits and dahs.  Sure enough, it was WEB.  UWL was also seen this morning
but
> much stronger.
>
> John Reed
>
>
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