[Elecraft] k3 - dual receiver & filters

[István Szabó]

On 2/9/2011 8:28 AM, Wayne Burdick wrote:
> Ralph,
>
> You're right: even if the filters don't have matched offsets, you can use diversity mode.
>
> But the main and sub synthesizer frequencies will usually be separated by a fraction of a Hz if the offsets are different, leading to a rolling sound in the receivers (phase precessing, a type of beat note). It can be distracting.
>
> This is why most users prefer to use matched filters.
>
> 73,
> Wayne
> N6KR
>
> ----
> http://www.elecraft.com
>
> On Feb 8, 2011, at 10:14 PM, Ralph Parker<ve7xf at dccnet.com>  wrote:
>
>>> If you plan to use diversity reception, then the matched filters are
>> necessary...
>>
>> C'mon, guys, this is not true!
>> I use diversity reception with one .400 8 pole and one .500 5 pole,
>> sometimes with one .250 8 pole and one .500 5 pole.
>> Better performance with matched filters = quite likely.
>> Necessary = not.
>>
>> Ralph, VE7XF
>>
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The effect can be heard on youtube, there is a diversity reception 
comparison of K3 and FTDX5000  from YO5...   
http://www.youtube.com/watch?v=iBGy5HNZxEc    K3 is an evident winner in 
diversity reception.

73,

István