Message-ID: <DEF0879101734958AE61D0D590E070DF@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <CAK59VFNOneVPmCEjVc1kK3FpvfmCX5qp_gZo5-AFy58Hmiq-6g@mail.gmail.com> <500FF064.1030109@iup.uni-heidelberg.de>
In-Reply-To: <500FF064.1030109@iup.uni-heidelberg.de>
Date: Wed, 25 Jul 2012 14:51:35 +0100
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Subject: Re: LF: 4X OP32 report
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Stefan

''OP32 is really slow''

Yes  but  twice  as  fast as  OP64 , for this  you  can  watch a  DVD  ! 
and OP4H, can go out  for the  night  hihi

But OP32 has  6 dB more sensitivity  , showing  down to  -40 dB  , in say 
Mikes case , that's  from  800 watts to  3200 ! quite a  saving , but as the 
system is  one-shot , the  dcode is  representing  the  Tx period , 
interesting  the  decodes  start  at -28 / stop  at -23 , the  signal  must 
rise and  fall  quickly ?

Pity  nothing decoded  in the  US last night , but  signal 's in 1500 /2000 
mile  range where  quite  substantial ...
from this , it seems  that propagation  on 136  is  really  linked to the 
seasons ? as  Gary , was using  a  small   35  ft  top loaded  vertical  and 
300 or  so  watts  , for  the  first  TA decode  by Joe,  using the original 
OP8  mode

Was /is the  second HOP propagation   available , if the  signal  was 
round  -20dB at  2000  miles  range  , in winter  time  would  the  second 
hop   loose  20 dB  reducing to  -40dB ?..surely not  as  Gary's   decode's 
where 10 dB over the lower limit of OP8..... is anyone  watching  the  dfc39 
signal ?

One  point  from previous  trials , If  Spec-lab  is  used  with  Opera  , 
then  SL must  be  set to  48Khz  sample  rate , or  OP can loose  low level 
decode sensitivity.

Monitors ,

Yes  many  Op stations  may  not  normally   use the  136  band  , but  as 
you  notice , with  some  warning , then  stations will  tune in,
and the  web/linked  beacon , shows  activity , so  stations  can  switch 
over , during  the  tx  !

73 -G..


And thanks to  Chris  for  monitoring  !


--------------------------------------------------
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
Sent: Wednesday, July 25, 2012 2:11 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: 4X OP32 report

> Thanks Chris.
>
> OP32 is really slow, so the entertaining factor is just 1/4. In OP8 it is 
> nice to do something else on the PC and watch the reports each few 
> minutes.
>
> Another effect seems to be that one day is needed until a number of 
> listensing stations appear on the map. Yesterday there was not so much 
> going on (relative) while there were many stations on the band over the 
> weekend and on monday. I expect tonite the activity will be higher again. 
> So i'll give it another try in 32...
>
> 73, Stefan
>
>
> Am 25.07.2012 12:03, schrieb Chris 4X1RF:
>> Stefan, LF,
>>
>> OP32 last night report in Haifa:
>>
>> 02:15    136 DK7FC Op32 -23 dB
>> 01:38    136 DK7FC Op32 -23 dB
>> 01:05    136 DK7FC Op32 -26 dB
>> 00:22    136 DK7FC Op32 -24 dB
>>     ***********  25/07/2012  ***********
>> 23:50    136 DK7FC Op32 -24 dB
>> 23:08    136 DK7FC Op32 -26 dB
>> 22:34    136 DK7FC Op32 -28 dB
>>     ***********  24/07/2012  ***********
>>
>> I've temporarily lost control of my Bucharest grabber so no reports from 
>> that end this time, should be fixed soon.
>> Thanks for the test,
>>
>>
>> 73s
>> Chris 4X1RF
>