No. I just know 20 mtrs is very noisy here.
Now its much better on a signal to noise ratio.
Every thing appears to be the same signal strengh on know frequencies.
Cheers
Jeff


"RHF" wrote in message
m...
JEFF-UK,

QUESTION - Prior to 'making' your Changes did you do any Reception
Testing and Record your Results ?

FWIW - Our Memories are "Poor-Recorders-of-the-Facts: When it
comes to all the 'factors' that make-up the Ojective Evidence
and Subjective Judgements like a Radio Broadcaster's Signal
Strength and the Background Noise Level {Signal-to-Noise Ratio}
of a Shortwave Band.
* Now multiply this by five to ten Broadcasters per SW Band.
* Then multiply this by five to ten SW Bands.
You now have 50 to 200 Observations to Memorize or Record.

I 'favor' the "Write-It-Down" Method.

Read Message # 556
Your ANTENNAS Journal-Ledger and Understanding the Shortwave Bands
http://groups.yahoo.com/group/SWL-AM...na/message/556

Read Message # 88
Hooking-Up a "Balun" [Matching Transformer] to a Random Wire Antenna
http://groups.yahoo.com/group/SWL-AM...nna/message/88


More Balun (Matching Transfromer Reading:

* MLB Theory
http://groups.yahoo.com/group/SWL-AM...na/message/340

* Magnetic Longwire Balun (MLB) - Help !
http://groups.yahoo.com/group/SWL-AM...na/message/173

* Magnetic Longwire Balun (MLB) - Build Your Own "DIY"
http://groups.yahoo.com/group/SWL-AM...na/message/177

* Balun / Matching Transformer Reading List ( Long 43 Links )
http://groups.yahoo.com/group/SWL-AM...na/message/337


iane ~ RHF
.
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/SWL-AM...na/message/502
I BELIEVE: On A Clear Night... You Can Hear Forever and Beyond !
.
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= = = "JEFF UK"
= = = wrote in message ...

Hi.
Further to my last post............
This weekend i messed about with my long wire receiving ( only ) antenna.
( Length 20Mtrs, coax fed , earthed 10 mtrs from house).
Yesterday i built a 9:1 balun / transformer.
Placed it at my earth rod out side.
I am not even sure if this is the right one for a long wire ?
Anyway.. reception on 20 mtrs now has much less noise now.
The signal to noise ratio has vastly improved.
Reception on other bands remains about the same as before i added
the balun.
(I used my Wellbrook loop antenna to compare signals.)
My question now is...
How do improve reception/noise on other bands ?
Do i need a different balun or change the length of my wire ?
What ever i have done seems to of peaked on 20mts ( 14Mhz).
It would be great to get rid of the noise on 80mtrs for example.
Any ideas or diagrams appreciated.
Interesting stuff this !

Regards
Jeff

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