[hpsdr] ANAN-10 28MHz generated birdie

[Dominique Dehays]

Hi all ,


just checked the low power output , 1st , to my surprise , there is RF 
there without switching anyhting , so when using the anan in 10w mode , 
this SMA connector wich is left open delivers RF!

The spectrum is the same : -60dBc spurris. I think I have to switch to 
the anan list cause I'm unhappy with the anan behaviour


73

Dom


Le 06/08/2016 à 14:40, Helmut a écrit :
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Ralph,
>
> the most important question is: Can you detect any significant birdie 
> in the mentioned offset or a drifting carrier on the 10 m band. Of 
> course we do have some spurs or harmonics (mostly outside the ham 
> bands) e.g. of 25 MHz Ethernet controller Xtal etc. When you mix this 
> spectrum with 116 MHz of your 2m transverter or even with another LO 
> frequency of 96/106 Mhz for the micro-wave bands you shouldn’t be 
> surprised about some ‘strange’ carriers. When these carriers are 
> dramatically drifting you should look for a SMPS device as causer.
>
> Successful hunting!
>
> 73, Helmut, DC6NY
>
> *Von:*Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] *Im Auftrag von 
> *Ralph
> *Gesendet:* Samstag, 6. August 2016 13:00
> *An:* hpsdr at openhpsdr.org
> *Betreff:* [hpsdr] ANAN-10 28MHz generated birdie
>
> I have had the same problem of a wide drifting birdie in my 144MHz 
> receiver.
>
> As I use the ANAN-10 to drive 144MHz transverters from 28MHz this 
> gives me the IF
>
> to use my DB6NT microwave transverters
>
> (I Have used various good quality 28-144MHz transverters with the same 
> result)
>
> It appears almost immediately on switch on and is noticable at the 
> bottom end
>
> of 144MHz which is my IF for Microwave bands. Drifting LF from about 
> 144.150
>
> down.
>
> The ANAN-10 I have was bought a few years back, direct from Apache 
> Labs India.
>
> and noticed from the first time I used it it had this Birdie. I 
> thought it may have
>
> been picked up locally from some source or other, but When Dom 
> mentioned it
>
> I realised it was not just my set-up or local RF environment.
>
> 73
>
> Ralph G4ALY
>
>
>
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