LF: Re: £10 Dongel-SDR Direct sample on 504 KHz - S/N TEST

[Minto Witteveen <minto.witteveen@gmail.com>]

Hi Graham,

Interesting…  0.1 uV is not bad. Should be good enough. What type of tuner does your dongle have btw?  E400 or R820T. Maybe you mentioned it but then I forgot.
I just popped the hood on my dongle, it has the R820T. So for comparison I will order one with the E400?

73’s Minto pa3bca

 

--------------------------------------------------------------------------
Ceterum censeo Carthaginem delendam esse

 

From: Graham

Sent: Sunday, April 07, 2013 15:53

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Re: £10 Dongel-SDR Direct sample on 504 KHz - S/N TEST

 

Minto

 

Quick test  at  0.1 uV   pd  as  before  ,  dongle  agc = off  , gain = max

 

Good  tone  from the  speaker  at  this  level  , the  drift 433 MHz  is possibly   the  xtal oven in the  sig-gen  warming  up  as well  as  the  dongle

 

low  trace  at  999 MHz  , needed  about   0.3  0.4  uV for  'tone'   but  I would  not  be 100% sure the  dongle was  looking  at  the  indicated  level  from the  gen , also  the  coax  is  still  attached  , but   0.1 uV  to  give these  plots  at vhf  is  reasonable ?

 

73 -G,