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Re: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB

To: [email protected]
Subject: Re: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB
From: "Mike Dennison" <[email protected]>
Date: Tue, 19 May 2015 11:15:31 +0100
In-reply-to: <[email protected]>
References: <[email protected]>, <[email protected]>, <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Well, I am running around 400mW ERP (as stated on my Opera beacon) 
from a transmitter with 800W RF output giving 3,2A into an inverted-L 
14m high with 5x14m parallel top wires. Antenna efficiency (assuming 
80% tx PA efficiency) is 0.05%.

I imagine G6AVK is running a lot less - from the reports it must be 
about 70mW ERP which suggests perhaps 0.1% antenna eficiency. His 
successes show how useful Op32 is.in producing reception at 1000km+ 
with that power level.

Mike, G3XDV
===========
 
> There  is  a  interesting  question  ..
> 
> Two  LF stations ,  quite  close , similar  times ,  Colin   running 
> 80  watts  carrier  power.. 
> 
>  what    power / Ae  efficiency    difference     produced     + 7 
>  and  +8 dB  at the  Rx's  ?
> 
> 73-G
> 
> 
> Rx at Mon, 18 May 2015 00:34:21 GMT
> From G3XDV by DF1VB/3 Loc JO31SK
> Frequency: 0.136 MHz (2200m), OPERA, -33dB
> Distance: 536 km bearing 91°
> 
> 
> Rx at Mon, 18 May 2015 00:34:21 GMT
> From G3XDV by EB3FRN-1 Loc JN01MC
> Frequency: 0.136 MHz (2200m), OPERA, -32dB
> Distance: 1194 km bearing 174°
> Using: Opera v1.5.7/Rptr V1.6
> Antenna: RX Op32
> 
> 
> 
> From: Graham 
> Sent: Monday, May 18, 2015 12:31 AM
> To: [email protected] 
> Subject: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40
> dB 
> 
> 
> Just 80 watts , just on the   Op32 decode  limit ,  dynamic  with  5  
> dB  in hand ?
> 
> 73-G,
> 
> 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB in Montbrio
> with .w + Bottom loaded Inverted L 11m x 21m
> 
> 23:16 136 G6AVK de DF1VB/3 Op32 Deep Search 297 mi -40 dB in Dortmund
> with .w + Bottom loaded Inverted L 11m x 21m
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> From: Graham 
> Sent: Saturday, May 16, 2015 12:36 AM
> To: [email protected] 
> Subject: LF: 22:54 136 G6AVK de DF1VB/3 Op32 Deep Search 297 mi -41 dB
> in Dortmund
> 
> 
> 
> 
> 
> 
> -----
> No virus found in this message.
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> Version: 2015.0.5941 / Virus Database: 4342/9815 - Release Date:
> 05/19/15
> 




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