I'm getting interested in this, in spite of my resolution to not engage
in Any More Projects... ;-)
If relatively simple single-conversion receive converter were designed
using a sharp, passive preselector, 29mhz +7 dBm LO and a Mini-Circuits
passive mixer, you could figure about 3dB loss in the preselector and
5db in the mixer, for a total loss of ~8dB.
Not knowing anything about the 472-479 khz average noise floor and
propagation, is that good enough?
Thanks,
Jim N7CXI
On 2/23/2012 11:19 AM, Lloyd Berg N9LB wrote:
I have a 500 KHz low pass filter on the way from Clifton Labs. I will
test 600-630 meter receive capability with the FLEX-5000 and FLEX-1500.
I'll give the group a report once I've had a chance to install it and
run some tests.
Also,
Ralph, W5JGV - WD2XSH/7, has "run the numbers" on how much power you
will need in order to generate 1 watt effective radiated power. ( A 50'
vertical, no top loading, will need 102 watts of transmitter output to
generate 1W effective radiated power ).
Check out the numbers here: http://500kc.com/600_M_Vert_Ant_Chart.htm
73
Lloyd - N9LB
___
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flexradio.com/ Homepage:
http://www.flexradio.com/
___
FlexRadio Systems Mailing List
FlexRadio@flex-radio.biz
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
