logo



Cluster Activity

Spots per uW band today:
UK spotter or spotted only.

Solar data:
SFI
4
A-Index
0
K-Index
132
Exp.K
eru
Sunspots
qui
Activity
no
GMF
Aurora?
M0DTS

My Weather

ArrayDate:12/04/22 Time:12:40
Temp:8.5C
Wind Speed:0mph
Wind Dir:337deg
Pressure:1005.26mB
Humidity:85%
Dew Point:5.5C
UKHASnet

After some chat with Charles i've made a plot of power curve of the combined RD06 and RD15 device...

gnuradio was used to ramp the output amplitude of a cw signal from the DATV Express.
A coupled output from the RD15 amp stage was fed into an rtlsdr dongle, the amplitude measured and plotted, the result is below.
The power is swept from very low o/p up to 9Watts.

Amplifier plot




In GNUradio right or wrong i've used the function probe to feed back the sawtooth signal from a signal source to a variable which is the value of the multiply const block.

GNURadio power sweep setup















Last page added:25/03/00 18:32
M0DTS.co.uk