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Re: LF: Re: GB4FPR 502 KHZ INTERNATIONAL MARCONI DAY 30/4/2011

from [Gary - G4WGT] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Re: GB4FPR 502 KHZ INTERNATIONAL MARCONI DAY 30/4/2011
From: Gary - G4WGT <[email protected]>
Date: Sun, 1 May 2011 10:22:50 +0100
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Hi Dennis,

Alan G3NYK has an ERP spreadsheet calculator which should be a good estimate & make the calculations easier. Calculators at the bottom of the page & you will find the page here :-


73

Gary - G4WGT.



On 1 May 2011 09:49, DENNIS EASTERLING <[email protected]> wrote:
Hi Luis
 
In answer to your question, I calculated using the following web site:
www.smeter.net/antennas/simple-t-antennas.php and then followed the link to TAntenna which provided a simple Basic program tantenna.exe by A.J.Edwards G4GGQ.   Probably the easiest way is to use a google search for T Antennas and follow the links.
 
The outcome is probably inexact as my antenna is really of the unbrella type with the tops sloping down, however when I converted from true 'T' to the present setup, no difference was noticed or reported.   See attached sketch.
 
73 Dennis M0JXM
----- Original Message -----
From: Luis EA3WX
Sent: Saturday, April 30, 2011 7:32 PM
Subject: Re: LF: Re: GB4FPR 502 KHZ INTERNATIONAL MARCONI DAY 30/4/2011

Hi Dennis,
 
A question, please. I am beaconing on 502,25 KHz. My transmitter puts 35 W into a T antenna, high 20 m and an horizontal capacitor top of 10 m.
 
With others ham fellows we are discussing what ERP I am sending, but we have no results. Can you tell me how measure or are you calculating or estimating this ERP?
 
Thanks, 73
 
Luis, EA3WX
 
Sent: Saturday, April 30, 2011 8:55 PM
Subject: LF: Re: GB4FPR 502 KHZ INTERNATIONAL MARCONI DAY 30/4/2011
 
Hi Graham
 
I tried sending to you 1630-1635 and 1940-1945 local times today Saturday 30 04 2011, but no reply.   I guess you could not hear me, or I you.   I send CW 25watts into a 'T' aerial 20m top and 10m vertical.   Estimated erp 250mW max.   Anyway, I hope you had a good day with plenty of DX.
 
73 Dennis M0JXM
 

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