015 QO-100 Satellite Receiving Technology And Explanation of a PLL (Part 3)

[@ramjin82]

Very informative and love the way all the information is broken down for us to understand…

[@HB9BLA]

Glad it was helpful!

[@charleswebb5022]

Enjoying this series. Learning a lot. Thanks

[@HB9BLA]

Glad you enjoy it!

[@matambale]

Good to see the CD4046 (early 1970s vintage, I think) is still put to use!

[@HB9BLA]

These functions probably never die!

[@santorcuato]

Such a PLL master class... Thanks Andreas.

[@HB9BLA]

PLL is a very important thing, I think...

[@dufflepod]

Great series.

[@HB9BLA]

Thank you!

[@maximus6884]

A clear video indeed. Thanks for breaking down the details for us the lazy.

[@HB9BLA]

Glad it was helpful!

[@TokkanFX]

Nice, a good simple explanation for the uninitiated.

[@HB9BLA]

Glad you think so!

[@lesourire511]

Thanks so much for this info

[@HB9BLA]

You are welcome!

[@aimeiz1]

Hello. Thank You for this nice video. Good explanation and interesting also for ones already active on QO-100. 73!

[@HB9BLA]

You are welcome! Maybe I once make a QO-100 meeting with some viewers...

[@PhG1961]

Waw, cool stuff ! I always loved the CD4xxx series, so much fun to work with !

[@HB9BLA]

True. They still are available.

[@phillipneal8194]

Very good explanation of PLLs. Thank you.

[@HB9BLA]

Glad you liked it

[@chrisv.7866]

What always amazed me (and I never really understood) about a PLL is how both frequencies at the comparator get in phase-sync. The vco can adjust frequency as much as it wants, if it is not in sync with the clock of the local oscillator, the comparator will always see a difference and the loop will never "lock". Cool concept though. My first encounters with it date from over 40years ago when I was tinkering with my CB transceiver (before I got my ham license)

[@HB9BLA]

The VOC always changes it’s frequency if not locked. Otherwise it would be as you write.

[@forextraderradioman]

Thank you! vy73, Dietmar, DL4HAO :)

[@HB9BLA]

You are welcome! 73

[@chuxxsss]

Morning Andreas, I hope you are well, mate. I loved fixing PLL s in the day with audio noise.

[@HB9BLA]

I am ok. Winter goes away and spring comes here...

[@chuxxsss]

@HB9BLA Wireless Autumn is on it way here. Time for a glass house, mate. Gold hunting tomorrow.

[@shakerileiwat4341]

Very useful information Thank you ♥

[@HB9BLA]

Welcome 😊

[@volkersch1083]

Sehr schönes Video - vor allem die PLL Erklärung. Bin bereits QRV per QO-100 ein tolles Projekt wie ich finde. Gruß auf Franken - DG5NDK

[@HB9BLA]

Ich finde ebenfalls dass wir extrem privilegiert sind ein so teures "Werkzeug" zu benutzen.

[@dave_dennis]

I sure wish the footprint of this satellite was viewable from North America. Andreas, I would love a deep dive on PLL design sometime. I’ve made them work but only through trial and error. I want to know the math behind calculating the corner frequency of the loop filter.

[@HB9BLA]

You maybe find a more specialized channel for the PLL topic. I do not plan to cover it here. And maybe A satellite operator has mercy with you and gives you access to a spare transponder, too.

[@zyghom]

I am here sir! ;)

[@HB9BLA]

Thanks for coming!

[@radioamateurjz]

The Ham Radio with the Swiss Accent rocks! Very interesting. Do you know any good online electronics course? To get more deeply into the theories behind this kind of circuits.

[@HB9BLA]

Unfortunately, I do not know such a course. I usually select a project to learn

[@radioamateurjz]

@@HB9BLA Thanks for the answer. Yes, that way is the best. 73!

[@catalinalb1722]

Hello Andreas, dose it matter if I supply 12v from a Clean Battery or from a switching power supply? Thank you & 73!

[@HB9BLA]

If your power supply is clean, it does not matter. I use this test to find out if my power supplies are clean: Compare it with a battery. I once made a video about cheap power supplies on my first channel. Maybe I cross-post it here.

[@DAVIDGREGORYKERR]

What about building the receive part of a ZERO IF transceiver and use a Raspberry Pi IV to demodulate AM and FM signals, if you only want FM then what about getting an old CYBERNET 928 CB transceiver

[@HB9BLA]

We do SSB on the QO-100 because it is more efficient.

[@phillipneal8194]

Are there LNBs for the HF (Amateur) bands ?

[@Richardincancale]

They aren’t needed because HF = 3-30 MHz and can be received directly by a low cost SDR, eg RTL-SDR for a few dollars.

[@HB9BLA]

And on the lower bands we often need attenuators rather than amplifiers because of strong signals...

[@kittony71]

show the connection from lnb to sdr receiver

[@HB9BLA]

Just a coax cable. with a Bias-T to feed the 12 volts for the LNB

[@kittony71]

@@HB9BLA great easy i will try too

[@mcconkeyb]

:-)

[@HB9BLA]

:-)