MEGASAT Diavolo Twin LNB modification for external reference - QO-100

Directors Cut :)

The first upload had 3 little "jumps" in the video and while there is no function to replace a video, I uploaded it again.

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Hello and welcome back to my channel.

This video shows the "standard" modification of a MEGASAT Diabolo Twin Gold LNB v3 with NXP chip. While the LNB has a "butterfly oscillator" and needs for best performance a 0° + 180° Phase Signal, it is necessary (easiest mod) to use a balun. All about the balun you see and read in the video.

After the modification don´t forget to put new sealed to the LNB to keep it safe from negativ influences. I do this with high temperatur sealed from our Car store. Not the cheapest but it works perfect. If you need more info about that, write in the comments.

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Thanks for all.
Sandor
DM4DS

0:00 Einleitung
0:09 Removing original 25MHz XTAL
2:25 Desoldering connector for external reference input
5:17 The BALUN is made on ferrite toroid 4.1mm outer diameter by 2mm inner diameter.
5:46 Ferrite toroid material is 67 with a permeability of 40. Primary and secondary winding are turns each.
6:53 Soldering the BALUN' secondary wires in place of the XTAL
8:35 Soldering the BALUN' primary wires. One to ground, one goes to the reference input through a capacitor.
10:51 Soldering 1 uF SOV X7R SMD capacitor on the input pin of the F connector
11:45 Soldering the remaining free BALUN primary wire to input capacitor.
13:28 Insulating contacts with some adhesive tape strips.
14:08 The modification is done!
15:35 Don't forget to re-seal the LNB against atmospheric agents with silicone sealant.

#LNB #mod #modification