Menu

Transformer for longwire antennas to reduce noise problem?

Search this Thread

Prev

Previous Post

Next Post

Next

#5

Report Post

Old

September 26th 04, 11:18 PM

Telamon

Posts: n/a

Default

In article ,
(TheGnome) wrote:

Hey -

I posted in here recently about active shortwave antennas - well, I
managed to get 75 feet of #26 magnet wire on a perpendicular roof to
my window of my dorm room, and two runs of 15' speaker wire as a
counterpoise in my room. I'm getting a really bad noise problem,
however - so bad that I can't hear stations on 20 meters! There's a
pretty solid S9 noise floor that prevents me from hearing anything
other than WWV and the major broadcast stations. Now, I know I can do
better with the amount of wire I've got strung out there.

I was thinking about adding one of those 9:1 transformers or other
impedance matching things for longwires; would this reduce the noise
problem I'm having? Any other tips for reducing longwire noise? It
works enough, but I know I can do better...

Thanks in advance.

You are in a tough spot with all the computers and other electronics
around. A common mode antenna is the worst choice for you as the S9
noise floor attests.

A small active loop in the quietest spot in your room or on the roof if
you manage it would work the best. I would be surprised if a transformer
would help you much on the wire because I expect that the antenna itself
is picking up the majority of the noise. An exception to this would be
if that 75 feet of wire on the perpendicular roof is a garage and not
other rooms full of computer equipment.

--
Telamon
Ventura, California

Reply With Quote

Reply With Quote

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Posting Rules
Smilies are On [IMG] code is On HTML code is Off Trackbacks are On Pingbacks are On Refbacks are On

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
s9 noise problem related to position of antenna tuner?	tedoboxer	Antenna	5	March 1st 04 02:02 PM
Poor quality low + High TV channels? How much dB in Preamp?	lbbs	Antenna	16	December 13th 03 03:01 PM
Ten-tec vee beam	Tom Coates	Antenna	8	September 21st 03 12:47 AM
Automatic RF noise cancellation and audio noise measurement	JGBOYLES	Antenna	25	August 11th 03 01:07 AM

All times are GMT +1. The time now is 07:02 AM.

About Us

"It's about Radio"

Contact Us RadioBanter forum home Privacy Statement

Copyright © 2017