Quite possibly , the dongle is only the
rf-head translating the rf to a data
stream , there seems to be some agc /
gain in the head , but all the filtering and
demodulation is handled by the software your
running on the pc , sdr-sharp puts up a good
show , there seems to be quite a big pool of
developers working on it , hdsdr looks
a bit more traditional in the way it 'runs'
there are some radio like features with
notch filters etc , you can run either
, hdsdr is a little more involved to
set up , but worth a look , http://www.hdsdr.de/
G,
Sent: Sunday, November 17, 2013 3:24 PM
Subject: Re: LF: Re: CQ anyone ? 472
also
It appears to be as good as the FLEX 3K on 24 es 28 Mhz CW and sensitivity
good and selectivity more than adequate.
I have a Datong converter IF 28 ES 144 Mhz so will have coverage right down
to the LF freq bands
Using a small 60 – 80 Mhz antenna at present so with the proper
resonant antennas for the desired bands it will be even better.
Using a fast laptop with 8 Gb ram and win 8
mal/g3kev
Sent: Sunday, November 17, 2013 11:52 AM
Subject: LF: Re: CQ anyone ? 472
Graham
Mine is performing fb this morning on 24 es 28 Mhz, no mods Antenna direct
into the dongle.
Cannot fault it so far and is also doing well on a test on the air
band
I have not tried the upper limit yet., good performer for less than
£10
73 mal/Scarboro
Sent: Sunday, November 17, 2013 11:17 AM
Subject: Re: LF: CQ anyone ? 472
Mal,
Its just a wire and a 0.1 uF to pin 1 (
?) of the A/D chip , fed from the
out put of the ATU , then select
direct sample in the software
a small pre-amp at a band pass filter
would help as the gain drop's off , for some
reason at MF , but for £6 its as good
as ft897d on 500
and better cross mod on top band /80 from the
local BBC MW station
Dont have any resolve on the win-7 , no one
on the user group seemed to have that problem , im
running win-xp-pro on this pc
73 -G,
Sent: Sunday, November 17, 2013 10:15 AM
Subject: Re: LF: CQ anyone ? 472
Graham
are you using a modified dongle ie wire bypassing the tuner for LF/MF
The dongle I have works fb with win8 but still having trouble on one
computer with win7 ultimate.
73 mal
Sent: Saturday, November 16, 2013 8:28 PM
Subject: LF: CQ anyone ? 472
Maybe some one is calling , but this is
all I can see , and that's before the flashing
lights are dug out of the attic
G,
and after a hour or so , it stops
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