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RE: LF: Re[2]: Re: QRSS OP WSPR

from [Bob Raide] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: RE: LF: Re[2]: Re: QRSS OP WSPR
From: Bob Raide <[email protected]>
Date: Fri, 27 Sep 2013 17:43:08 -0400
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G;
Another issue is the freq!  Gary shows 72.4 as cleaner on his grabber.  Some of the Europeans are saying 74.550 is best.  Gonna try WSPR 15 tonite on 74.550 and see what shakes.  Gotta give QRSS 60 a chance and then back to an OP mode-Bob
 
From: [email protected]
To: [email protected]
Date: Fri, 27 Sep 2013 22:34:03 +0100
Subject: Re: LF: Re[2]: Re: QRSS OP WSPR

Thats  the  problem   3 dB =  1000 watts 
 
Your looking  from a  good  SDR Rx    op32  = -40 dB    OP65  must  be  -43 / -44 dB  bottom  limit  , but then  Markus   has  cunningly  devised  a  post  process  , correlation  system that  pattern  matches  the  OP keying  signature  for  each  call  , that  gives  another  7 db or so   +   taking  things to  -53    , that  7 db is   x4  power  , an  extra  4Kw   free , noting that  the  OP system is  averaging and will  make use  of  any  qsb  , that  -43  is  average  over 65  mins
 
In this  situation  , with  minimal  efficiency  ,  max  AE system  , Max  TX power , Rx sites  are  well  sorted  this side  ,   the  only  option  left  is  time , if  op65   wont   cross  the  pond  ,   Jose  has a   OP130 option   , that's  a  long  cycle  , but  its  another  3  dB  and  double  the  sample  size  , after  that   stability is a  problem
 
from the  first  decodes   OP16   would  of  made  it  locally , that  would  give  a  qsb  profile , as to  what  go's on , Gus  sm6bhz  is  starting  to  think OP8 is  better  than  OP32 , hes  putting  in some  good  ranges  in the  night  , but  he  has  quite a  substantial   Ae  ..
 
Design  =  efficiency  =  TA   :- )
 
73-G,

From: Bob Raide
Sent: Friday, September 27, 2013 10:08 PM
Subject: RE: LF: Re[2]: Re: QRSS OP WSPR

G;
If I could handle more voltage at the base of my vertical I have the capability of going to 5 KV plate volts @ 2 amps plate current.  I would have to use a keyed CW mode to run this rig like that.  But it would kick ass.  I wouldn't want to run a steady state keydown carrier much over 4-5 KW.  So OP 65 would have 3+ db jump over anything else right off the bat!  But can't handle the ant input voltage-this is a log house and wood constructed garage for the shack-fire dept over 2 miles away in town-this place would burn to the ground-Bob
 
From: [email protected]
To: [email protected]
Date: Fri, 27 Sep 2013 21:55:50 +0100
Subject: Re: LF: Re[2]: Re: QRSS OP WSPR

We have still  the  last  working  OP2   qso  mode , which  can  send   ' I have two cats' 
But  the  decode   s/n is   -20 dB , ROS-MF-2   is  round  -26 dB  -28dB   about the  same
as  wspr-2  , but a  full  free  running  data  mode
 
At  speeds  less  than  1  baud  , would  any one  use  such a  mode , there  was  a  ROS  0.1 Baud
7/8  db lower  , but  very  very  slow  !  ..
 
In the  start , was the  problem  of  translating   audio  to  rf  on 136/500  , but  now  that
seems  to  be  much  less  of a  problem
 
73-G,

From: Alex R7NT
Sent: Friday, September 27, 2013 9:40 PM
Subject: LF: Re[2]: Re: QRSS OP WSPR

Dear LF enthusiasts!
my opinion is not very original in English - in Russian I would write A4+++ :-)

"CQ R7NT K"
QRSS20  -  28' 40'"  simple TX, visual decode, subjective report, random time, QSO mode....
DFCW20  - 11' 4"      little more complicated TX, visual decode, subjective report, random time, QSO mode....

"any call ++"
Qp32  - 32'    simple TX, software based decode/report, random time, no QSO mode....
WSPR-15 - 15'  little more complicated TX, software based decode/report, 00', 15', 30', 45' times to start, no QSO mode........

QRSS20 ~~=DFCW20 ~~=OP32 ~~=WSPR-15

Comparing OP32 and WSPR-15 (OP8/WSPR-2) is equally as comparing QRSS20 and DFCW20 (QRSS3/ DFCW3)
I personally like DFCW, JT9-5..10 more.... but I have the little choise now....
...maybe WOLF agn?

73! Alex R7NT  136.73.ru
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