[hpsdr] Alex - Harmonics On 10m?

[Joe Martin K5SO]

Hi John,

As has been noted here by several others, a variety of "peculiar"  
signals, often accompanied by a higher-than-normal base line noise  
level, appears on 10 meters in particular if your Alex filter boards  
are not well grounded to the HPSDR system ground.  I could certainly  
see such "signals" here on 10 meters with improper grounding.

73,  Joe K5SO


On Nov 8, 2011, at 8:30 PM, John Westmoreland wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello All,
>
> Received Alex and have a question - has anyone seen harmonics on 10  
> meters?  Just wondering.
>
> I will run a proper VNA sweep on it later this week - but just want  
> to ask if there are any existing issues with harmonics on any of the  
> bands - namely, 10m.
>
> Note I think I saw something while receiving - I have not tried xmit  
> yet.
>
> 160m and 80m look pretty OK; haven't really looked to hard at the  
> other bands just yet.
>
> Hey - great work by you guys - this is a lot of fun.
>
> 73's,
> John W.
> San Jose, CA
> AJ6BC
>
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