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[86.134.201.218]) by mx.google.com with ESMTPS id fp3sm11208889wib.7.2012.09.01.23.07.57 (version=SSLv3 cipher=OTHER); Sat, 01 Sep 2012 23:07:58 -0700 (PDT) From: Terry GW0EZY To: References: <000001cd8810$7b23f220$716bd660$@com> <002d01cd8853$3f197af0$bd4c70d0$@com> <68C1B4735C85472DA442B70F4963742A@AGB> In-Reply-To: <68C1B4735C85472DA442B70F4963742A@AGB> Date: Sun, 2 Sep 2012 07:07:56 +0100 Message-ID: <000001cd88d1$4ce8a5b0$e6b9f110$@com> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac2IYIoso5jbR31cQJm2oziT+SvWaQAbvPCA Content-Language: en-gb X-Gm-Message-State: ALoCoQm+z/cPtgClKZNvwGtNjuPHBeCR8OjD+i//VGxigUBFs0yIpZSRVtuprcRUMc7U0TLEwBDWozm8rM+sQrAGYzzpXfO0vblXoLbnWtUsDi22zGukZ00mu4HMH562ErRy/TeTE1bHtdKX3/6ZLQctPQRO50KHRmVAPI0F5NoAsIeR6K/+UVtrKcdJMkRpjxGhD2iJNeRD X-Spam-Score: 0.9 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Graham Fell asleep over the keyboard at 23:00 so took a guess and left the system at 136.227 OP32. SDR14/SpectraVue was set up with dual channel receive "dial" frequencies 136.000 and 136.227 kHz with mono output so the OP32 decoder was seeing both OP32 sub-bands and could dual decode VO1NA and the "normal" stations DF2JP DF6NM etc. Bet it wasn't designed to do that as the decoder sees an extra 3dB of noise in this arrangement but it seems to have sorted all the signals out. [...] Content analysis details: (0.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.212.181 listed in list.dnswl.org] 1.6 SUBJ_ALL_CAPS Subject is all capitals -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 903ce439c63f3d003fd332ac7920b8c3 Subject: RE: LF: VO1NA Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01CD88D9.AEAD0DB0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_60_70,HTML_MESSAGE, SUBJ_ALL_CAPS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d4ad45042f829444c X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0001_01CD88D9.AEAD0DB0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Graham Fell asleep over the keyboard at 23:00 so took a guess and left the system at 136.227 OP32. SDR14/SpectraVue was set up with dual channel receive "dial" frequencies 136.000 and 136.227 kHz with mono output so the OP32 decoder was seeing both OP32 sub-bands and could dual decode VO1NA and the "normal" stations DF2JP DF6NM etc. Bet it wasn't designed to do that as the decoder sees an extra 3dB of noise in this arrangement but it seems to have sorted all the signals out. Now off to the Telford rally. 73 and thanks for the test Terry From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Graham Sent: 01 September 2012 17:33 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VO1NA Thanks Terry This where it becomes a little messy The mid band audio frequency's are OP32 = 1550 Hz and OP8 = 1650 Hz So for a carrier frequency of 137.777 KHz , that gives Rx dial set usb of 136.227 for OP32 and 136.127 for OP8 As the pass bands are 100 Hz wide , then these will be +/- 50 Hz max So depending on the Rx setting accuracy , you could round down to the last , 20 Hz or 7 Hz Eg my Skanti R5003 tunes in 100 Hz steps , so 136.2 or 136.1 , would put me 27 Hz off , which all being well , leaves 20 Hz or so to the filter edge All Joe needs to post in advance is the selected mode speed as a change of speed , will need a Rx re-set . I don't think Joe's TX P/C is web linked , so there will not be a TX beacon , 73-G. NB:: Now if you want , that could also be translated to a dial set for LSB as the Opera mode is only 1 tone ........ but I don't think we will go there just yet .. but would that drop dfc39 out of the rx pass band .... I wonder .. From: Terry GW0EZY Sent: Saturday, September 01, 2012 4:05 PM To: rsgb_lf_group@blacksheep.org Subject: RE: LF: VO1NA Yes no problem. Please could you confirm the "dial" frequency? If Opera could specify left or right audio channels I could do both sub-bands as SDR-IQ/SpectraVue provides a two channel Rx with output on L and R channels. Maybe SL could do the split for Opera. I'll keep an eye on BS to see when to set up. 73 Terry From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Graham Sent: 01 September 2012 12:20 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VO1NA Terry Joe was asking about running Opera beacon on 137.777 as he is fixed frequency , but problem is arranging a monitor group as operations are now 136.000 usb Is it possible you could monitor 137.777 using Op mode , If Joe runs overnight again ? Im sure we can arrange others to join in Tnx Graham From: Terry GW0EZY Sent: Saturday, September 01, 2012 8:07 AM To: rsgb_lf_group@blacksheep.org Subject: LF: VO1NA Joe Screen grab of your signals last night. Strongest appears around 04:30 UTC with interesting deep QSB dip about 1 hr later. Still copy at 07:00 UTC. SDR14 with Wellbrook LFL1010 untuned loop 73 Terry GW0EZY ------=_NextPart_000_0001_01CD88D9.AEAD0DB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Graham

 

Fell asleep over the keyboard at 23:00 so took a guess and left the = system at 136.227 OP32.

 

SDR14/SpectraVue was set up with dual channel receive = “dial” frequencies 136.000 and 136.227 kHz with mono output = so the OP32 decoder was seeing both OP32 sub-bands and could dual decode = VO1NA and the “normal” stations DF2JP DF6NM etc. Bet it = wasn’t designed to do that as the decoder sees an extra 3dB of = noise in this arrangement but it seems to have sorted all the signals = out.

 

Now off to the Telford rally.

 

73 and thanks for the test

 

Terry  

 

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of = Graham
Sent: 01 September 2012 17:33
To: = rsgb_lf_group@blacksheep.org
Subject: Re: LF: = VO1NA

 

Thanks  Terry 

 

This where  it  becomes a little =  messy 

 

The  mid  band  audio  = frequency's    are     OP32  =3D  =  1550 Hz   and OP8 =3D 1650  Hz =

 

So  for a  carrier  frequency  = of  137.777  KHz  , that  gives   Rx = dial  set usb   of  136.227    for  = OP32    and   136.127  for  OP8 =

 

As the  pass  bands  are  100 = Hz  wide  , then  these will  be   = +/-  50 Hz  max  

 

So  depending  on the Rx  = setting  accuracy , you  could  = round  down  to the  last  ,  20 Hz  = or  7 Hz

 

Eg my  Skanti  R5003 tunes  in 100 = Hz  steps  , so  136.2  or  136.1 , would  = put  me  27 Hz  off  , which  all  = being  well  , leaves 20 Hz  or  so  to = the  filter  edge

 

All  Joe needs  to  post  in  = advance  is the selected  mode  speed  as  = a  change  of  speed  , will  need  = a  Rx  re-set . I don't  think  = Joe's   TX P/C is  web linked , so  there  = will  not  be a  TX  beacon = ,

 

 

73-G.

 

NB::  Now  if you  want , that  = could also  be  translated  to a  dial  = set   for  LSB as the  Opera  mode  = is  only  1  tone ........  but  I don't  = think we will  go  there just yet  .. but  = would  that  drop  dfc39  out of the  rx = pass  band .... I wonder ..

 

 

 

 

 

 

 <= /o:p>

From:= = Terry = GW0EZY

Sent:= = Saturday, September 01, 2012 4:05 PM

Subject: RE: LF: = VO1NA

 

Yes no problem. Please could you confirm the “dial” = frequency?

 

If Opera could specify left or right audio channels I could do both = sub-bands as SDR-IQ/SpectraVue provides a two channel Rx with output on = L and R channels. Maybe SL could do the split for = Opera.

 

I’ll keep an eye on BS to see when to set = up.

 

73 Terry

 

From:= owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_g= roup@blacksheep.org] On Behalf Of Graham
Sent: 01 = September 2012 12:20
To: rsgb_lf_group@blacksheep.org=
Subject: Re: LF: = VO1NA

 

Terry

 

Joe  was   asking  about  = running  Opera  beacon  on  137.777  as he = is  fixed  frequency , but  problem  is  = arranging  a  monitor  group  as  = operations  are  now  136.000 usb   =

 

Is it  possible  you  could  = monitor  137.777  using  Op mode  , If Joe  = runs overnight  again ? Im sure  we can  arrange  = others  to  join in 

 

Tnx

 

Graham

 <= /o:p>

From:= = Terry = GW0EZY

Sent:= = Saturday, September 01, 2012 8:07 AM

Subject: LF: = VO1NA

 

Joe

 

Screen grab of your signals last night. Strongest appears around = 04:30 UTC with interesting deep QSB dip about 1 hr later. Still copy at = 07:00 UTC.

 

SDR14 with Wellbrook LFL1010 untuned loop

 

73 Terry GW0EZY

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