Shortwave Radio Listeners (SWL) : Are Your Antenna and Ground Really Working Together ?
- From: RHF <rhf-newsgroups@xxxxxxxxxxx>
- Date: Wed, 18 Feb 2009 19:23:04 -0800 (PST)
On Feb 18, 12:41 am, BCBlazysusan <gk...@xxxxxxxxxxxxx> wrote:
On Feb 18, 1:35 am, RHF <rhf-newsgro...@xxxxxxxxxxx> wrote:
On Feb 16, 4:02 am, BCBlazysusan <gk...@xxxxxxxxxxxxx> wrote:
I'm almost embarrased to ask this question but I want to hear what
some of you all have to say.
I know the importance of grounding, I'm a grounding freak (when it
comes to the antennas), be it here at my QTH or in the vehicle. But I
have never actually grounded any of my receivers itself. By that I
mean I have never actually grounded the radio before at my home.
I did over the weekend and I am curious - - does this make a
noticeable difference on the receiving end? I don't know if it's just
been a good listening environment over the weekend or did my grounding
of the radio make the difference.
I have noticed a 'very' low noise floor (almost to nothing) on both
the shortwave bands, especially 60 meters and also on the BCB bands.
Luckily I live out in the country away from a lot of the rf problems
people have in the city and I can't believe that I could get the noise
floor even lower than it usually is. Just good conditions this weekend
or did the grounding of the radios actually help in this?
BCB LZS,
What you are looking for is better Signal-to-Noise
[S/N] Ratio from your Antenna & Ground System :
1 - Good * Sometimes the Signal Level will Improve
and the Noise Level may go down a little.
2 - Not-So-Good * Often the Signal Level will improve
and the Noise Level will also go up.
3 - Better * Then Again Sometimes the Signal Level
will be reduced some what and the Noise Level
will go down a lot.
4 - No Change * Nothing Changed {Oh Well}
.
If between your Antennas and your Radio Shack you
are running Coax Cable and your Coax is Grounded :
Then 'effectively' the Radios connected to your
Antennas via the Coax are already Grounded TOO.
.
The First Reason for a Radio Shack Ground and
Having Your Radios and Equipment Grounded IS
Electrical "Safety".
.
Someone will most likely suggest that you use
a Ground Window or Single-Point-Ground for
your Radio Shack's Radios and Equipmenthttp://www.comm-omni.com/edcoweb/grndw.htmhttp://en.wikipedia.org/wik...
.
Other will recommend that you "Bond" All
Your Grounds per the NEC.http://www.mikeholt.com/mojonewsarchive/GB-HTML/HTML/Grounding-Part-1...
.
-imho- An 8-Foot Ground Rod in the Earth as
close to your Radio Shack as possible and
"Bonded" to your House's Electrical System
is a good beginning for having a 'Safe' Radio
Shack. ~ RHF
.
Alpha Delta DX-SWL Shortwave Sloper Antennahttp://www.alphadeltacom.com/pg7.htmlhttp://www.universal-radio.com/C...
-iirc- the DX-SWL Shortwave Sloper Antenna
does not use a Matching Transformer.http://groups.google.com/group/rec.radio.shortwave/msg/ea0bc32528e305...
Shortwave Antenna Safety Tipshttp://www.universal-radio.com/CATALOG/sw_ant/safeswl.html
.
hope this antenna & grounding info helps
- - - iane ~ RHF {pomkia}
Twain Harte, CA -USA-
.
Are You Interested in building a better Shortwave Listening
(SWL) Antenna ? {SWL Group} =http://tinyurl.com/ogvcf
GoTo =http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
RHF's Standard "Shortwave Radio Listener (SWL) Antennas Group"
Reference Message Signature-Line =http://tinyurl.com/25zbrghttp://groups.google.com/group/rec.radio.sho...
.
* Remember 55.5% of Shortwave Radio Listening (SWL)
is the Shortwave Antenna =http://tinyurl.com/ogvcf
.
RHF's Radio Shack in Twain Harte, California -USA-
SHACK INFO =http://tinyurl.com/2skmxm
Shortwave Radio / Receiver and SWL Antenna Info
.
Shortwave Listener QSL Reports Newsgroup : SWL : INFOhttp://groups.google.com/group/shortwave-listener-qsl-reports/
.
-= 6GZ4GB + 32UCPM + OGVCF + 25ZBRG + 2SKMXM =-
.
.- Hide quoted text -
- Show quoted text -
Thanks for the links. I was just grounding them.....because. ;-) You
know what I mean? I wasn't doing it to try an improve anything. I have
everything outside grounded as well as one can do IMO. I was just
surprised that I could tell a difference, like I said, I actually
thought the antenna wasn't connected. That is a pretty low noise floor
IMO. ;-)
SWLs : ARE YOUR ANTENNA and GROUND . . .
REALLY WORKING TOGETHER ? ? ?
.
1 - With both the Antenna and the Radio Ground
'connected' to the Radio and the Radio "On" :
* Find a good strong S9 Signal Frequency X,xxx kHz
+ 10 kHz {no signal} background band noise. [S_]
-- 10 kHz {no signal} background band noise. [S_]
.
2 - Remove the Antenna and keep the Radio Ground
'connected'
* Same Frequency X,xxx kHz for that S9 Signal
^ Signal Level now 'changed' to [S_]
+ 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
-- 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
.
3 - Re-Connect the Antenna and Remove the Radio
Ground 'connected'
* Same Frequency X,xxx kHz for that S9 Signal
^ Signal Level now 'changed' to [S_]
+ 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
-- 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
.
4 - Remove the Antenna and Remove the Radio
Ground 'connected' [Plugged into AC Power Only]
* Same Frequency X,xxx kHz for that S9 Signal
^ Signal Level now 'changed' to [S_]
+ 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
-- 10 kHz {no signal} background band noise.
^ Any 'change' to the background noise level [S_]
.
FWIW - Some Do #4 First.
.
NOTE - Your results for 120m, 90m and 75m Shortwave
Radio Bands may be 'different' then for 22m, 19m and
16m Shortwave Radio Bands.
.
RESULTS - What every gives you the Best Signal
and the Lowest Noise Levels on a given Shortwave
Radio Band is what works best for you {Best S/N Ratio}
.
it's always nice to know that your antenna and
ground are working together - iane ~ RHF {pomkia}
Twain Harte, CA -USA-
.
Are You Interested in building a better Shortwave Listening
(SWL) Antenna ? {SWL Group} = http://tinyurl.com/ogvcf
GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
RHF's Standard "Shortwave Radio Listener (SWL) Antennas Group"
Reference Message Signature-Line = http://tinyurl.com/25zbrg
http://groups.google.com/group/rec.radio.shortwave/msg/411dac3b4a1798e0
.
* Remember 55.5% of Shortwave Radio Listening (SWL)
is the Shortwave Antenna = http://tinyurl.com/ogvcf
.
RHF's Radio Shack in Twain Harte, California -USA-
SHACK INFO = http://tinyurl.com/2skmxm
Shortwave Radio / Receiver and SWL Antenna Info
.
Shortwave Listener QSL Reports Newsgroup : SWL : INFO
http://groups.google.com/group/shortwave-listener-qsl-reports/
.
-= 6GZ4GB + 32UCPM + OGVCF + 25ZBRG + 2SKMXM =-
.
.
.
- References:
- Grounding Question
- From: BCBlazysusan
- Re: Grounding Question
- From: RHF
- Re: Grounding Question
- From: BCBlazysusan
- Grounding Question
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