[Lowfer] qrp xiq in EN90xn

[John Langridge]

I've been playing with seriously compromised antenna for the past few weeks running some experiments.  Last night I was running 10 watts to the coax and had marginal results.  Eric copied me 24 times over the course of the night, best at -22.

Tonight I pushed the power up to around 50 watts and that seems to be the tipping point as results have been spectacular tonight.  

The normal antenna (72 ft T-top with 130, 100-foot radials) is detuned at the moment.  The 102" whip, which is actually a 1" aluminum pipe, 102" tall, is resonated with two coils in series, about 850 uH total (will measure when I disassemble it in a few days) and sitting over an old radial field which at one time had about 70 radials, each 45 -50 feet long.  The radial field has not been used in many years and the radials have not been maintained in some time so i don't know how many radials are actually active.

This setup is definitely working tonight.  So far in this series of experiments the best results were found with a 20m inverted vee (45 degree sloping angle) fed as a marconi with 25 feet of ladder line, resonated with a 5 gallon bucket vario and 4, 30-foot radials.  That test was conducted from a site 1-mile away from here so no chance of interaction with a resonant structure.

Its really been amazing what i am finding about the performance of small antennas on 630m...Don't get me wrong, I still prefer the big antenna but its been interesting dispelling the myths about small vertical performance...it does help that we average 30 mS/m in this area..

73,

John XIQ




________________________________
 From: Michael Sapp <wa3tts at verizon.net>
To: John Langridge <jlangridge at sbcglobal.net>; "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net> 
Sent: Thursday, January 23, 2014 9:30 PM
Subject: Re: [Lowfer] qrp xiq in EN90xn
 

John: Must be the ground system or whatever else you are coupling too, certainly not the mobile CB whip :)).....

Although this paper indicates it's possible.....

http://wwebmail.amwindow.org/tech/pdf/Short%20Ant%20CESmith%201947.pdf

Really did not expect to copy your signal at that level with the wet noodle in my back yard.....XJM and his phased beverages I can understand.....

73  Mike wa3tts


----- Original Message ----- From: "John Langridge" <jlangridge at sbcglobal.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Thursday, January 23, 2014 10:18 PM
Subject: Re: [Lowfer] qrp xiq in EN90xn


Thanks for the reports Mike.

I should also note that I am running a 102" whip tonight on TX.
73 and thanks again!

John XIQ




________________________________
From: Michael Sapp <wa3tts at verizon.net>
To: lowfer at mailman.qth.net
Sent: Thursday, January 23, 2014 9:14 PM
Subject: [Lowfer] qrp xiq in EN90xn


HI All: First time I recall capturing WG2XIQ at QRP power (2mw)......19 captures here since 0136 UTC,

best levels so far -25

2014-01-24 02:16   WG2XIQ   0.475666   -25   0   EM12mp   0.002   WA3TTS EN90xn   1743   55
2014-01-24 02:12   WG2XIQ   0.475666   -25   0   EM12mp   0.002   WA3TTS EN90xn   1743   55


I should snooze on the living room couch more often....(if it is going to help keep the band open, hi)


XJM must have his antennas another direction, I was hoping for some comparison info......

73 Mike wa3tts
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