[Elecraft] K3 - diversity reception question

[wayne burdick]

This is about an 8 dB drop. The first 3 dB can be attributed to the 
fact that main and sub are now sharing the main antenna path (the 
splitter gets turned on). The other 5 dB must be due to some 
combination of the other factors I listed:

> 1. band-pass filter alignment and losses
> 2. 1st mixer loss
> 3. crystal filter loss
> 4. crystal filter ripple
> 5. physical alignment of the SUB AF control (when used as main/sub 
> BALANCE)

Are the crystal filters in the two receivers matched? If not, you could 
be using a filter with a lot of loss in the sub vs. the main at a 
particular bandwidth.

I'll be out of town for a few days, so you might want to check with 
Gary about how to isolate which of the above is causing the loss. You 
can try different bands and filters, for example.

Wayne
N6KR

On Jan 31, 2009, at 3:06 AM, Dr. Werner Furlan wrote:

> I think I need some help with this.
> I have connected a noise gernerator to my ANT1 and I see AFV floating
> between 622 and 702 with SUB engaged,  and 1578 and 1719 without SUB.
> (this was on 3.670 kHz)
>
> 73! de Werner OE9FWV
>
>
>
>
> -- 
>  Foreploy: Any misrepresentation about yourself for the purpose of
>  obtaining sex.
>
>
> Email powered by Pegasus Mail free at <http://www.pmail.com>
> Homepage: <http://www.qsl.net/oe9fwv/>
> Fone +43 5522 75013
> Fax +43 5522 75013 15
> Mobile +43 664 6340014
> Elecraft K2 #5203 K3 #656
>
>
>
>

---

http://www.elecraft.com