Re: Stupid RF newbie has a question...
From: Dave (db5151_at_hotmail.com)
Date: 10/14/04
- Next message: Spehro Pefhany: "Re: OT: US BLEW IT IN IRAQ- Wall Street Journal Reporter Finds"
- Previous message: Dirk Bruere at Neopax: "Re: OT: US BLEW IT IN IRAQ- Wall Street Journal Reporter Finds"
- In reply to: Charles Schuler: "Re: Stupid RF newbie has a question..."
- Next in thread: Terry Pinnell: "Re: Stupid RF newbie has a question..."
- Messages sorted by: [ date ] [ thread ]
Date: Wed, 13 Oct 2004 19:51:41 -0500
"Charles Schuler" <charleschuler@comcast.net> wrote in message
news:RMmdnfmPCo81WPDcRVn-oA@comcast.com...
>
> "Dave" <db5151@hotmail.com> wrote in message
> news:ckk9bu$28c@library2.airnews.net...
> >I am wanting to build a simple RF amplifier to boost the signal to my
> > television, and then use the knowledge I gained in that project to build
a
> > second RF amplifier to boost and filter the signals I receive on my
> > Shortwave radio (which I connect to a random-wire antenna up on the
roof.)
> > I have a background in electronics (with the exceptions listed earlier)
> > and
> > would like to keep on learning in this new direction. I do have a
simple
> > workshop set up (again, after 20 years) and am basically seeking to pick
> > up
> > the hobby again.
>
> Wideband RF amplifiers are not a beginner's project. Not trying to
> discourage you, but to cover 54 to 800 MHz with decent noise performance
and
> gain is not easy. If you want to boost one channel (or so) that's more
> manageable. Short wave covers 2 to 30 MHz and many preamps are already
out
> there. By the way, the sensitivity of many modern receivers is such that
> little can be gained (pun) with a preamplifier. Ramsey electronics might
> have some kits. Nothing wrong with kits for a beginner. Also, you can
> Google for some schematics.
>
> Again, the ARRL handbook is a gem if you really want to learn RF.
> Electronics can be a fun hobby. It's just not as easy as it once was to
> come up with anything significant at home.
>
>
Hmm. I have a schematic I intend to follow for the SW part (MFJ 1020A) and
have already purchased the discrete components, but realized I don't know
much about actual construction, which is the basis of what I am wanting to
pursue. For the TV part, I am thinking only of channels 2-69, or something
like that. 54 - 450 Mhz is what I have in mind. The reasoning behind this
is that our old VCR gave us fantastic reception, but the new one doesn't
(same antenna but in a different location- it used to be mounted on the
carport, and is now in back.) I've been told repeatedly that VCR's don't
amplify the incoming signal, but that VCR did (signal quality dropped
significantly when I was taken out of the circuit.) For the TV RF amplifier
I am planning on using a couple of NTE10 VHF/UHF amplifiers, equivelant to
the 2SC3510. I figured I would come up with my own schematic after
digesting Wes Hayward's book, and perhaps Christopher Bowick's. (I have
time on my hands, and don't mind the research.) If you have a suggested
source for schematics I am all ears. For that matter, I'm all ears anyway.
I am just trying to pursue my old high-school hobby of tinkering and using
what I learn to build something usefull.
Thanks,
Dave
db5151@hotmail.com
- Next message: Spehro Pefhany: "Re: OT: US BLEW IT IN IRAQ- Wall Street Journal Reporter Finds"
- Previous message: Dirk Bruere at Neopax: "Re: OT: US BLEW IT IN IRAQ- Wall Street Journal Reporter Finds"
- In reply to: Charles Schuler: "Re: Stupid RF newbie has a question..."
- Next in thread: Terry Pinnell: "Re: Stupid RF newbie has a question..."
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
