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

from [Minto Witteveen] [Permanent Link][Original]
To: <[email protected]>
Subject: LF: Re: £10 Dongel-SDR Direct sample on 504 KHz - S/N TEST
From: Minto Witteveen <[email protected]>
Date: Sun, 7 Apr 2013 19:07:29 +0200
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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

 
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Ceterum censeo Carthaginem delendam esse
 
From: Graham
Sent: Sunday, April 07, 2013 15:53
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,
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