Re: LF: Good OP8 results .. Q 136 OP32 Test ?

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Wow, i can see EA7HAZ. That is a nice "goal". There are a few stations on that pskmap that i never heared from on the reflector. That looks like a real chance to get some newcomers. At least i have some hope!
Well, now i am not in Heidelberg and cannot transmit this night but i may give it a try soon again.

Good luck for Mike!

73, Stefan/DK7FC


Am 22.07.2012 21:17, schrieb Graham:

Ok Stefan,

 

Well , we can only  wait  and  watch  ! , there  are  14  monitors  at the  moment , just  hope  , switched  to  OP32

It is  summer , may be  136  activity  was  not  expected , could be  on vacation etc ?

 

Audio  band  for  OP32  is   100 Hz  1500  to  1600 Hz  with  +/-   2 Hz   total  system  stability  requirement  , this  should not  be a  problem

 

GL 73 -G..

From: Stefan Schäfer

Sent: Sunday, July 22, 2012 7:05 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Good OP8 results .. Q 136 OP32 Test ?

Hi Graham,

I do not doubt that W1VD will decode me on OP32 these days. But are there others like VO1NA? I also wrote an email to him but got no answer so far. What about VE1VDM?

73, Stefan

Am 22.07.2012 18:09, schrieb Graham:

Remarkable   results  using   OP8  on on  136  from  Stefan,  Mike and  Tom  both  reaching  TF3HZ    1858 Km   and   RN3AGC / RX3QFM , though  not  at the  same  s/n level !, but  both  decoding  inside the  OP8 limits

 

While the condx, appeared  not to  support  TA propagation  , this  would  be a  good  opportunity  to  to  test the  OP32 mode

 

Could we ask, those using  Opera OP8   on 136 to  change to  OP32  for  any overnight  or  other  beacon  activity for comparison ?

 

OP32  offer's  a  6 dB lower  decode s/n  , but  with  X4   longer  tx 'times'  may  provide  range  extension greater than  predicted  by  s/n , the  system working  by  average  power  along the  time  line , being  able to  take  advantage of  qsb  and  flash  events ..

 

Thanks  All

 

Graham

G0NBD

 

INFO :-

 

Follow the progress of Op8 tests and other 136 activity on Mikes Blog,

http://g3xdv.blogspot.co.uk/

400 mW   ERP >>  136kHz Op8 to Iceland and Russia

Transmitted an Opera8 beacon again overnight on the 136kHz band and got reports
from RN3AGC, RX3QFM and TF3HZ (-32dB). The Icelandic station produced five
decodes between 0022 and 0202. Best distance was 2681km to RX3QFM. Highlights
were as follows:

02:02 136 G3XDV de TF3HZ Op8 1858 km -35 dB in Reykjavik
01:37 136 G3XDV de TF3HZ Op8 1858 km -31 dB in Reykjavik
01:12 136 G3XDV de TF3HZ Op8 1858 km -32 dB in Reykjavik
00:47 136 G3XDV de TF3HZ Op8 1858 km -32 dB in Reykjavik
00:47 136 G3XDV de RX3QFM Op8 2681 km -33 dB in KO91OO
00:22 136 G3XDV de TF3HZ Op8 1858 km -32 dB in Reykjavik
00:22 136 G3XDV de RN3AGC Op8 2483 km -34 dB in Moscow
23:57 136 G3XDV de RN3AGC Op8 2483 km -31 dB in Moscow