Hello Graham,
Please see
below!
73,
Tom,DK1IS
Am 27.06.2014 22:52, schrieb
[email protected] [rsgb_lf_group]:
Tom,
At least its running !
Yes it
is and not so bad!
'' only the
q-input works''
This only means
that if you click the ExtIO button at the HDSR user interface "RTL Setting"
offers to you at Direct Sampling "Disabled" (for VHF/UHF), "I input" (no
stations at HF, only noise) and "Q Input" (stations at HF).
Do I assume,
that they are using a single ended feed
for the low band
?
Having no datasheet for the
RTL2832U I´m not sure about this. As you can see on the picture enclosed at the
lower side of the pcb there is a small ferrite toroid for the HF signal with two
output wires, first being fixed with silicone on the RTL2832U housing and then
going to two adjacent pins of the IC - whatever this means.
Is there
some form of pre-amp / pass band
filter before the input
?
There is no pre-amp but you
can see a two stage low pass filter on th left side of the ferrite toroid (two
coils and 6 capacitors)
