[amsat-bb] Re: One questiong for ant hombrewers...
kc6uqh at cox.net
Tue Jul 24 21:41:07 PDT 2012
You may want to consider a one wavelength one turn QFH. Its best gain is
below 30 degrees above the horizon. The pattern is still omni.
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Pável Milanés Costa co7wt
Sent: Monday, July 23, 2012 5:14 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] One questiong for ant hombrewers...
Hi to all.
I'm Pavel Milanes, CO7WT, from Cuba, member of the GROS.
I have a question in my head and I have not enough arguments to decide, I
have to BUILD my own antennas, so having this into account:
What is the most cost effective (cost / gain / difficult in building / omni
pattern) that can I build?
I have in plans to build a LNA from a servian pdf using the BF998 MOSFET,
that will be at the antenna point, Andrew Heliax LDF-4 50 ohms for the
download to the shack and of course this is a FIXED antenna, with NO rotors.
I have heard of and modeled all this ones and all have his pros and cons...
- Turnstile dipoles
- Turnstile moxons (100 ohms)
I think (correct me if I'm wrong) that the best election will be the QFH,
because his really omni pattern, beside the fact that I will have to build
two of them (rhcp and lhcp switched properly with a relay) and the lower
gain will be 'compensated' with the LNA...
Please, I don't want to start a flag war, only heard about some experiences
to decide my self.
Last tip, TRX on 70 cm will be a Kenwood channelized TK-382N for FM (5W) and
TRX on 2m will be a Alinco DR-130.
Este mensaje ha sido enviado mediante el servicio de correo electronico que
ofrece la Federacion de Radioaficionados de Cuba a sus miembros para
respaldar el cumplimiento de los objetivos de la organizacion y su politica
informativa. La persona que envia este correo asume el compromiso de usar el
servicio a tales fines y cumplir con las regulaciones establecidas.
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB