[hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie

[Dominique DEHAYS]

Hi dave ,

 

so there is something stange on mine. I have just tried to lsn on a second 28Mhz RX taking care that it is not saturated. I TX on 28.1 and looking up the band I've found:+196/+251/+276/+451/+786/+1049/+1600Khz , and I suppose the same down the band below 28.1. I have not measured the relative levels yet , for sure the two I've written about in my previous message were -60 and -63 , I'll tell abt the others later.This is on the 10W output , but trying to reduce power changes nothing on the spuriois levels I've measured yesterday

 

73

Dom

 

 

> Message du 05/08/16 18:45
> De : "Dave" 
> A : "'Dominique Dehays'" , hpsdr at lists.openhpsdr.org
> Copie à : 
> Objet : RE: [hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie
> 
> Hi Dom
> 
> I saw nothing within -70dBC inband on my ANAN10 when using the xverter port
> on 28MHz . My Anan has been used on many 2/4m contests with a Transverter
> without complaints from my (VERY) locals
> 
> This port does however have bad harmonics see
> http://g4fre.blogspot.co.uk/2013/11/anan-10-as-transverter-driver.html 
> 
> Dave
> G4FRE
> 
> -----Original Message-----
> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of
> Dominique Dehays
> Sent: 05 August 2016 17:31
> To: hpsdr at lists.openhpsdr.org
> Subject: [hpsdr] ANAN 10 28Mhz tx spectrum and generated birdie
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> 
> Hello ,
> 
> after getting a local friend complaining about hearing me on several 
> frequencies , I've measured the anan 10 output spectrum , and was 
> surprised to find spuriis 295 and 590 Khz each side of the carrier at 
> -60db/-63dB. I know it is within FCC norms but it is really annoying.
> Another problem is that the anan generates a wide drifting birdie in my 
> 144Mhz receiver ( of course a separate receiver not the anan). Anyone 
> got the same problems?
> 
> 73
> Dom
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