[Elecraft] P3 Broad Birdie & straw men...

[Joe Subich, W4TV]

> The second receiver is MUCH better shielded than the first receiver
> and has virtually zero birdies of its own, but in my opinion the
> second receiver contributes greatly to the birdies that occur in the
> first receiver.

I don't agree ... based on my two K3s - both have subreceivers.

I have very few birdies that I can't track to specific Ethernet devices
somewhere in the house.  Perhaps I've been lucky in the way I installed
the subreceivers but I did not take any undue care in routing cables.

One of these days I will go on a search and destroy mission for all of
the offending devices.  I will remove/disable all of the unused network
cards and shield/choke/replace switches and wireless access devices as
necessary.  I hope that that improving the antenna system and getting
away from the 30' high Windom that hangs directly over the shack will
help with the Ethernet birdies <G>.

73,

    ... Joe, W4TV


On 6/13/2011 4:34 PM, David Gilbert wrote:
>
> I don't have a P3 so can't comment there, but I do own a K3 and spent a
> lot of time trying to eliminate birdies when I first got it (before the
> arrival of the excellent SIG RMV software feature).  The second receiver
> is MUCH better shielded than the first receiver and has virtually zero
> birdies of its own, but in my opinion the second receiver contributes
> greatly to the birdies that occur in the first receiver.  In general
> (but not always), I found it important to keep cables away from the
> shield of the second receiver to minimize the birdies in the first
> receiver.
>
> Several other K3 owners who only have the first receiver have made the
> same comment that you just did, so I'm not surprised to hear it again.
> And of course, if you listen for the birdies while having an antenna
> connected to the antenna port, band noise will mask many of them.
>
> 73,
> Dave   AB7E
>
>
>
> On 6/13/2011 1:09 AM, Stephen Prior wrote:
>> I can only assume that either the majority of the birdies arise as a result
>> of the second RX (which I do not have) or I'm just plain lucky, as I haven't
>> recognised any spurious signals at all in my 3 years of ownership of the K3.
>>
>> Stephen G4SJP
>> K3 #980
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