[Elecraft] OT: ICE still functioning?

[Alan Bloom]

One application for band-pass filters is explained in the article, HF
Yagi Triplexer Especially for ARRL Field Day" in June 2010 QST.  By
adding series-tuned filters to a set of store-bought band-pass filters
they were able to use a single tri-band beam with three transceivers at
the same time.

Here's an interesting comment from the article where they did some
interference tests using various transceivers with a dummy load for an
antenna.  That is a worst-case test since the QRM is not covered up by
band noise.

    "While this represented an artificial situation, nevertheless
    it was a useful way to expose underlying interference issues,
    which we did see in most cases.  The only exception was an
    absence of any interference between two Elecraft K3 transceivers."

:=)

Al N1AL


On Thu, 2011-04-28 at 13:23 -0300, gary bartlett wrote:
> In the interest of reducing interference from/to our K2/sK3s and
> the equipment of our friends at multi-transmitter events, I'd like to see
> the topic taken one step further:  a short explanation of why the need for
> band pass filters with Elecraft equipment exists in the first place.  
> 
>  
> 
> *         Whose radio am I protecting, mine or the other guy's?
> 
> *         What am I protecting it from?
> 
> *         Why doesn't the radio take care of this problem itself?
> 
> *         What is transmitted phase noise and what do I do about it?
> 
> *         Where does the K3 stack up in the world of transmitted phase noise
> in amateur radio equipment?  (I believe the answer is that the K3 is very
> quiet and that I am more apt to be to victim, rather than the source, of
> this problem]
> 
> *         Other relevant stuff I don't know about
> 
>  
> 
>             Can anyone point to a source of basic operational application of
> band pass filters explained at this level and with the emphasis removed
> about the insides of the filters themselves?
> 
>  
> 
>             73,
> 
>             Gary, VE1RGB
> 
>  
> 
>                         
> 
>  
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ron D'Eau Claire
> Sent: April 28, 2011 12:40 PM
> To: elecraft at mailman.qth.net; 'Rick Stealey'
> Subject: Re: [Elecraft] OT: ICE still functioning?
> 
>  
> 
> Rick, that has never been true in practice in the 10+ years I've
> participated in this reflector, nor can I find any mention of that in the
> official list guidelines at www.elecraft.com
> 
>  
> 
> IMX, anything related to Ham radio that someone owning an Elecraft rig might
> be interested in is welcome for discussion here. 
> 
>  
> 
> 73, 
> 
>  
> 
> Ron AC7AC
> 
>  
> 
> -----Original Message-----
> 
>  
> 
> With all due respect guys...........
> 
> If it is OT it BY DEFINITION doesn't belong on this reflector,
> 
> no matter how interesting, no matter that everyone in the ham
> 
> world is interested in the fascinating topic.  No matter that
> 
> the participants on this reflector are some of the most
> 
> knowledgeable people on earth (which they are), and also
> 
> the nicest.  If it isn't Elecraft related it doesn't belong here.
> 
> Eric has to come on here periodically and remind us all.
> 
> CME, ICE are not Elecraft topics.
> 
>  
> 
> There, I feel better now.
> 
>  
> 
> Rick  K2XT
> 
>  
> 
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