[amsat-bb] Re: External Amplifier Legality Questions
zleffke at vt.edu
Wed Mar 19 13:24:13 PDT 2014
Haha! I knew I was going to get questions about the peak power levels.
I should have mentioned this in the first email, but it was already
pretty long winded (so here goes a long winded reply).
First up about my original question about legal issues:
It looks like the consensus is I'm good to go. Right now based on
calculation, I should be legal with enough suppression. I will measure
the system performance before going on the air to ensure that I am legal.
To address the numerous concerns about peak power:
So the 100W figure is the peak power the amp can deliver. I will /not/
be operating this amp anywhere near its peak power levels when working
the birds. So do not fear! I won't be blasting the birds.
However, increasing the scope of my interests in the hobby a bit from
Amateur Satellites to Amateur Radio in general, having a canned system
capable of about 100W (a little higher at VHF, and just about 100W at
UHF) could come in handy for things like VHF and up contesting. This
system has overlapping amateur radio goals, of which satellites are one.
I am not using a traditional hardware radio, but rather an SDR (ettus
research B210) my wife bought me for my birthday (best present ever)
that only puts out about +10dBm (plenty to drive this amp).
I'll be using M2 Antennas products with "gobs" of gain, further reducing
the needed TX power requirements. I do want to experiment in the future
with some homebrew omnis (lindenblad, eggbeater, etc..) and being able
to bump up the power a bit on TX without having to worry will be a nice
To address Paul's note about control:
My involvement to date with the Fox project is with the camera card, not
with control ops. However, I am VERY interested in the possibility of
joining the Operations team and becoming a control station for AMSAT for
the Fox series (and beyond). However, for all my "book-learning," and
LOTS of RX only ops on the birds, I only have a handful of actual
contacts under my belt. So right now I'm just trying to get a station
up and running to increase my activity on the birds. Maybe down the
road when the bugs have been worked out of the system and I am a little
less green, then I'll look at control ops a little more closely, and
having a decent amp could come in handy there as well (assuming of
course the AMSAT ops team needs/wants me to participate in control ops).
Thank you very much to everyone for the quick feedback. I appreciate
everyone taking the time to help educate me.
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