----- Original Message -----
Sent: Saturday, May 05, 2012 6:11
PM
Subject: Re: LF: Flex 3000 sdr
radio
Op 5-5-2012 19:22, mal hamilton schreef:
MF/LF
First observations indicate that the radio is a good
performer on HF with appropriate antennas but on MF/LF with large antenna
arrays there is cross modulation and overload. This could be overcome with a
stepped ext attenuator or using smaller antennas on receive.
Some other radios that I havd tried are useless on
LF/MF with small antennas but very good with large antenna
arrays.
73 de mal/g3kev
Mal,
FlexRadio info, valid for Flex 5K
and 3 K (Flex 1k5 below 500 kHz)
Note 7: Customer provided
pre-selector or appropriate low pass filter(s) required to eliminate images
when used below 1.8 MHz
For a good performance of your SDR you need
a band pass filter for 136 kHz and 500 kHz, an attenuator is not enough to get
rid of all the ghost signals that show up on and around these
bands.
Albert
