DC106 Cam TX

 DC105 + new HF Board  = DC106

Hier neueste DVB-T Sender Modul als USB Transmitter.
Here latest DVB-T transmitter module as a USB Transmitter,
Frequency range: 100MHz...2500MHz ( because this is broadband, bandpass or low pass filter is needed )

Size:   42mm x 42mm

Output Spectrum....

Test 2400MHz :
Soft set 0dB ---- Output 2mW ---- Shoulder 53dB
set -10dB ------ Output 0,25mW ---- Shoulder 56dB

Test 1280MHz :
Soft set 0dB ---- Output 6mW ---- Shoulder 53dB
set -10dB ------ Output 0,8mW ---- Shoulder 58dB

Test 436MHz :
Soft set 0dB ---- Output 9mW ---- Shoulder 54dB
set -10dB ------ Output 1mW ---- Shoulder 57dB

------------------------------ in use --------------------------------------------->

The DC-106 and OE7DBH Darko's 1W 70cm amplifier were part of a payload flown on a surplus weather balloon. 
It reached a burst altitude of 98,000 feet and maximum distance from the launch site was 39 miles. 
The transmit antenna was a 70cm 'Wheel' design on the bottom of the package and receive antennas 
were 11 element yagis with pre amps.
We were able to receive and record live QPSK, 4MHZ, 720P HD video during the flight from lift off 
until approximately 1 1/2 minutes before landing, a distance of 39 miles from the airport.

A few fun facts about the flight:
Launch: 10:25 AM
Burst: 11:57 AM - 97988 feet altitude
LOS of digital signal: 12:24 PM - 3500 feet altitude
Landing: 12:26 PM

Temperature readings in degrees F from inside the package:

Max: 96.9 10:32 AM - Shortly after launch - built up heat from the DVB-T amplifier
Min: 37 11:39 - 11:41 AM 78799 feet altitude for 2 minutes - clearly past the thermocline - must have taken 

time to warm up.

Attached are frame grabs 5 seconds before burst and the last video before landing.
Best,
Tom K5SAF