Searching for this
70T40G50 TWT Amplifier
How to make enough power on 47 GHz, anyone able to help me
with such an amplifier.
At the end of may 2020 I received my new pre-amp LNA to be placed in front of my transverter
Mny Tnx to all who made this LNA possible, it will be a very important improvement of my RX system
I will need to make some mechanical changes in my RX system to place the LNA in my RX chain
On 7 april I mounted the encoders for antenna readout and I measured moonnoise
Later that day I did moon noise measurements
My first moon noise measurement was at 17 degrees elevation 0,45 dB
The best measurements I did was at 25 degrees elevation with 0,58 dB, see picture above
During the testing of my gearbox I already found that it was turning much too fast for reliable tracking.
I searched for possible solutions and decided to try if a pulse width modulated power supply for the electromotor would help
I found these small PWM motor controllers and decided to try if this would give me the solution
On 12 march I received this unit and first indication during a test looked promising.
As soon as weather permits I want to test this on the gearbox and hope that it will work out as hoped for.
At 3 march 2020 I made my first solar noise measurement using the 1.8 mtr dish and my home made feed
I had, as can be expected. to optimize the position of the feed for best performance
My first solar noise measurement resulted in a bit more than 2
This is already a nice result after only 20 minutes of trying.
I also measured hot earth cold sky resulting in about 0.8 dB
In December 2019 I started with a first setup for 47 GHz EME
Hearing from several stations working to be QRV with low power I joined in and see what would be possible
My first trial will be to test RX on 47 GHz and see if my antenna would be useable
I had a gearbox available for this but it needed an other
electro motor because the original motor was turning
After removing the motor I build a replacement able to mechanical fit at to place of the old one
After the modification of the gearbox the antenna was still
turning much too fast.
I also had to make a feed holder. I started with the original
11 GHz feed which was a feedhorn for 11 GHz with a round feed and several
To understand the possibilities to make a 2 way QSO using WSJT or CW I tried to make calculations based on station parameters which are possible by now
My first calculation trial is based on 1Watt output and a
noise figure of 5 dB
I found a nice presentation from UA3AVR