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Same stick Stefan
The layout is uff/vhf down
convertor feeding 28 MHz
A/D , every one started
using HF to VHF convertors , but they have
a problem as the off set qrg
approaches 'zero' in the oscillator
starts to leak into the signal path
At first there was very little
code data on the chips , but some one
managed to get the command listings and now , can
turn the down-mixer off or make
it idle - and with connecting directly
to the a/d , you now have a
HF radio
you need to google to buy
or for drivers etc ...
main chip set for dongle >> RTL2832U + E4000 Amazon ,
etc but some of the prices are now a
bit silly , some of the HongKong
sellers are adding plugs and software
HDSDR
SDRSHARP
This is the dongle I modified for HF ,
you can see C2 , linked to pin 1 of
the A/D , just connect to that ( if it was
a one way mod , you could remove the
cap to isolate the a/d)
Good luck ! if it go's bang ,
then its £10 wasted , not $1000
!
73-G.
Sent: Thursday, April 04, 2013 7:39 PM
Subject: Re: LF: Re: LF: £10 Dongel-SDR Direct sample on 504
KHz
I read about these TV dongles, mentioned a few months ago. But
this VHF stuff is uninteresting for me. However, if there are sticks that cover
LF and MF, this could be interesting.
So, what is the name of the stick?
Link? "Cozy Cave" leads me to that page http://www.calicavycollective.com/2012/04/cozy-cave-from-cozy-cavy.html
73,
Stefan
Am 04.04.2013 20:25, schrieb Graham:
UP Convertor ?
Pete
No need now , the latest drivers now
address the a/d (i/q) directly ,
those shots are only using the
dongle , with a wire to pin 1 of the a/d .the
e4000 convertor chip is not used , ,
to use vhf , need to simply change
the sample setting and connect
the vhf Ae to the normal
input
Direct sampling ... there is no
fall off past 1 mhz , that was
the 504 carrier to day , with qsb
showing on Spec-lab in 3D , had about 25 % cpu
left on the old P4 100MHz pc ,
will also run sdr +
Opera or Ros [ must drop
a dual core in some time !]
73 -G.
Sent: Thursday, April 04, 2013 7:07 PM
Subject: LF: Re: LF: £10 Dongel-SDR Direct sample on 504
KHz
Try Cozy Cave
TV DVB sticks have been available for 12months at about a tenner (that's Sterling; EU ?). Thought every
body had one by now. Using HDSDR with Balint Seber's plug in you can receiver from almost DC to light....... :o)
Using an up converter to 60megs plus, will give full HF coverage (LPF's help).
The Chip set also allows other tricks
that Graham describes look on You-tube.
There are other very expensive alternatives beware!
73 es GL Pete M0FMT IO91UX
G.. Unbelivable! Where can one buy that dongle? Do you have a
link for us? 73, Stefan/DK7FC Am 04.04.2013 15:01, schrieb
Graham:
All
£10 Dongel-SDR Direct sample on 504 KHz
The latest window drives for
the ultra-cheap sdr dongle
project , now have the 'direct sample'
option
all that is needed is a wire
to pin '1' of the AD chip , [ ie use
the decoupling cap as a terminal post]
select I/Q , and you have a HF rx ,
which tunes down to zero (ish)
This is the 504 carrier from my main Ae
via tuner , showing qsb
navtex from the south coast last night
518 ,100% copy , so not bad ..
73
-G..
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