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EME in 2012 (85)
Chirp Sounders (63)
436MHz DATV Up-Converter (56)
22-25GHz Amplifier (56)
Portable Amplifier box *** (55)
ATV Contest 2007 (55)


Cluster Activity

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

Solar data:
SFI
71
A-Index
6
K-Index
1
Exp.K
1
Sunspots
12
Activity
qui
GMF
qui
Aurora?
no

My Weather

Date:18/01/18 Time:00:03
Temp:3C
Wind Speed:15mph
Wind Dir:135deg
Pressure:988.02mB
Humidity:118%
Dew Point:6.6C
UKHASnet
146MHz Amp Tests

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:07/01/18 10:15
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