Beiträge von DB8TF

Its time for leila to start working.

Many stations with far to much pwr on the uplink

73s DB8TF

What is now with the TX Power Level?

When i transmit a CW Signal it is About 10dB above the PSK telemetry.

Is that to much Uplink power ?

vy73 DB8TF

RX 130cm Offset + Octagon unmodified with software drift correction : 17db NB TP Floor. Fully sufficient.

TX 80cm Offset + 4 winding Helical feed @ 20 W : abt 4db weaker than the most other Signals (Maybe Helical is not properly mounted in the feedpoint, will check that soon)

vy73 DB8TF

Software Drift Correction locked on the lower EB works perfect!

VY73 DB8TF

My Little MRF21045 died after only 5 min

But now the Motorola SSPA is working well

vy73 DB8TF

Zitat von DB8TF

Looks like Goonhilly NB websdr is on the EB freq, instead of the P4A TP freq?

73 DB8TF

i see now they changed it to the right freq

Looks like Goonhilly NB websdr is on the EB freq, instead of the P4A TP freq?

73 DB8TF

Maybe a small segment of the transponder can be temporarily "reserved" for test purposes.. Could be useful..

YL3AKC : i hope you adjust & test your TX equipment on the ground, and not over the P4A transponder.

I wonder what sat this is: (sec 57)

DL5RDI

Link: 20W WiFi Booster module for 2.4 GHz

Dieselbe Frage hatte ich auch schon gestellt.

Der Verstärker scheint kein RX Pfad zu haben.

vy73 DB8TF

There are many ways to get the right dimensions.

Helical feeds are really forgiving about small changes in dimensions.

I found the hardest part of the assembly to get a good SWR, but after some fiddling with the small metal plate near the N-connector i get a good match.

How this feed will perform in practise we'll see when we are allowed to TX to EH2.

vy73 DB8TF

Hello all,

because a OM has asked me about the construction details of my helical dish feed i packed some detail photos into a Zip archive.

Maybe someone here finds it useful for a diy helical dish feed.

In the also enclosed PDF the calculations for the dimensions are described. Document fm W1GHZ.

vy73 DB8TF

I am still searching for somebody who can write a sdr# plugin for the 1-stick solution, or for any other SW running on M$.

Simon from SDR-Radio said he will look at a this function for his SW but that takes some time and he has much more features to implement prior to this.

My 2PC + 2Dongle + external controller solution works well but a easier solution would be great.

vy73 DB8TF

Maybe someday some kind of chat is implemented to this forum so we can go deeper in technical details without "flooding" the forum

I'm optimistic MELCO has done a very good job on this and the TP will work very well.

But now back to the initial topic uplink "power regulation".

vy73 DB8TF

Allright, its similar like AM mod silent carrier. If you want a clean mod you need to swing up and down in pwr, but if you already have the power close to or at the max transmitter power you can't go further up and never get a good mod.

Thank you, i'm smarter now in sat tech

Whats that "OBO" thing in the satellite?

My setup is close to those specs, 80cm dish @ 15w.

Leila won't talk to me