K3 with KBPF3_ KVX3A works well at 500-KHz

[Edward R Cole]

I thought I would change the thread (title) a little.

I have been using my K3 on 500-KHz (running in the TEST mode) for
several months.  It is driving two buffer amps for 10mw to drive a
surplus NDB xmtr (non-directional beacon) as a 100w linear amp and
feeding a 43x130 foot inverted-L antenna.  I have determined my noise
floor is about --110 dBm (S3) with the K3 connected to the
antenna.  I use a Clifton Labs filter to reduce BC band signals to
eliminate RF splatter on the 500-KHz band, but without the filter BC
reception is very good.

I have not done much SWL on HF but the few times I check WWV,
reception seems to be equal the ham bands.

73, ED - KL7UW
My 3.24w ERP signal has been heard 1366 miles on 500-KHz;  I have
heard CW from Buffalo, NY on 500-KHz.
----------------------------------------------------------------------

Message: 1
Date: Sun, 5 Sep 2010 12:21:32 -0400
From: Guy Olinger K2AV <[hidden email]>
Subject: Re: [Elecraft] K3 RX Ant question
To: Alan Price <[hidden email]>
Cc: Elecraft <[hidden email]>
Message-ID:
         <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1

That sounds about right.

"Make a difference" is a problematic understanding unless you are
talking before and after installing.  Once installed in your K3 RX the
KBPF3 is invoked whenever you are listening on any frequency that
requires it.  So A/B testing is hard, unless you have the K3 opened up
and are putting it in and taking it out making comparisons.

The ham bands have pass band filters in use, and reception gradually
diminishes tuning into the HF broadcast bands.  Without the KBPF3,
this diminishment is gradually heard, but is not hugely noticeable,
say in the 40m commercial broadcast band, given the power levels some
stations are running. The AM BC band IS severely attenuated by the K3
through main ant jack(s) without the KBPF3 and RX and jumps up quite a
lot listening through the RX antenna and KBPF3.

73, Guy.



73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 144-QRT*, 432-100w, 1296-QRT*, 3400-fall 2010
DUBUS Magazine USA Rep [hidden email]
======================================
*temp
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html