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From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <5116977F.50108@npton.plus.com> <51169844.60906@psk31.plus.com> <511699B8.4000208@iup.uni-heidelberg.de> <51169C65.2060800@psk31.plus.com> <5116A1E6.5040806@iup.uni-heidelberg.de> <5116A6CF.3040609@psk31.plus.com> <17CDB7B27CCF4FFC8EBE21149BDE815D@PcMinto> <5116D582.9010004@psk31.plus.com> <D0D204B7880144B1BC4892133337ACB8@PcMinto> <5116E32F.7040505@psk31.plus.com>
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Date: Sun, 10 Feb 2013 00:59:19 -0000
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Subject: Re: LF: Re: WSPR Test
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Ed..

Longer TX periods gave more time for propagation or QRM to give zero
results,

We have  times  of  2,4,8,16 , dropped  16  as that  was  ott  , most  made 
TA  to  usa  with  2 , but 4  gave  another  -3 dB  ... 8 ? well  may  be  , 
dose seem  to  work  over distance

WSPR does it better quicker.

Is that  wspr  15  ?

G..



--------------------------------------------------
From: "g3zjo" <g3zjo@psk31.plus.com>
Sent: Sunday, February 10, 2013 12:00 AM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Re: WSPR Test

> Hi Minto
>
> Transmit only, Opera is very simple, I think the PIC code of your message 
> is still available from the software GUI menu, the timing is merely bits / 
> message time. Yes I just sat and coded it without writng down any 
> protocol, its easier than WSPR.
> The main thing that annoys me with OPERA on MF is the long TX periods. 
> Longer TX periods gave more time for propagation or QRM to give zero 
> results, I feel WSPR does it better quicker.
>
> Same here on final builds but the present nest needs to be less quick 
> flash, bang, vapour resistant.:-)
>
> Eddie
>
> On 09/02/2013 23:37, Minto Witteveen wrote:
>> Hi Eddy,
>>
>> Where did you get the description of the OPERA protocol? And did you 
>> write the encoding yourself?
>>
>> I found a protocol description of Opera on Andy’s (G4JNT) website, but it 
>> is reverse-engineered, and I seem to remember him complaining about 
>> undocumented (and unannounced) protocol changes.. So I am not sure how up 
>> to date his description is.
>>
>> I understand that Opera is quite efficient, so I am still somewhat 
>> interested… but not in just simply generating Opera timings with an 
>> obfuscated and secret external program and then parsing this through my 
>> PIC/AD9850 TX. Where is the fun in that?
>>
>> As for  a final build.. there is no such thing here @pa3bca… As soon as 
>> it’s finished (i.e. I cannot think of additional things or software to 
>> add) it will probably start gathering dust somewhere. Or (more likely) I 
>> will attach a key(er) and use it for CW. Beaconing for beaconing’s sake 
>> is not for me.
>>
>> 73’s and please keep us posted on results.
>> Minto pa3bca
>>
>>
>>
>>
>> --------------------------------------------------------------------------
>>
>> Ceterum censeo Carthaginem delendam esse
>> -----Original Message----- From: g3zjo
>> Sent: Sunday, February 10, 2013 00:02
>> To: rsgb_lf_group@blacksheep.org
>> Subject: Re: LF: Re: WSPR Test
>>
>> Hi Minto
>>
>> Nice one.
>>
>> There is a 4066 on my Modulator / Mixer board too,  unused here, I can
>> reconfigure and plug in the Key. I am not sure of any ultimate
>> configurations for a final build, it is still at the experimental stage.
>> I have a CW / OPERA QRSS Module too, I  have coded and tested OPERA it
>> is OK but I can't get to love it.
>>
>> 73 Eddie G3ZJO
>>
>> On 09/02/2013 22:22, Minto Witteveen wrote:
>>> I too have built a standalone 472 100 Watt TX with a PIC (and an 
>>> AD9850). The software I have written so far now handles CW, QRSS, DFCW 
>>> and WSPR-2 and WSPR-15  (thanks to Andy who wrote up a nice description 
>>> of the WSPR protocol).
>>> Even with a simple ‘air cooled’  10 MHz crystal  (40 MHz with 4x PLL) 
>>> running the PIC timekeeping is quite good, and it seems good enough to 
>>> have the PIC running for more than a day and still getting WSPR decodes. 
>>> If I run it from a 12.8 TXCO it will be even better.
>>> I now sync the TX (for WSPR) by getting the PIC out of reset exactly on 
>>> an even minute….
>>>
>>> I am not sure if I am going to implement Opera. There is too much 
>>> obscurity here for my liking. Apart from the difficulty of getting a 
>>> good and complete description of the protocol it’s the secrecy itself 
>>> that has no place in radio amateurism (at least that is how I think 
>>> about the issue).
>>>
>>> As for being a despicable  appliance operator: notice the 4066? Here I 
>>> can attach a key..
>>>
>>> The PIC board will disappear. Possibly I will add a PIC to the DDS board 
>>> (will have to reposition the 7805 for it to fit). Either that or I will 
>>> add a small board with the PIC and connectors for the LCD display, the 
>>> RS232 for a terminal and possibly a rotary encoder.
>>> Add a 24V 150 Watt Meanwell switching PSU and it’s a neat little 
>>> self-contained package.
>>>
>>> See attachments for a photo of the current setup and a quicly drawn 
>>> schematic
>>>
>>> 73's Minto pa3bca
>>>
>>>
>>>
>>>
>>> --------------------------------------------------------------------------
>>>
>>> Ceterum censeo Carthaginem delendam esse
>>> -----Original Message----- From: g3zjo
>>> Sent: Saturday, February 09, 2013 20:43
>>> To: rsgb_lf_group@blacksheep.org
>>> Subject: Re: LF: Fwd: WSPR Test
>>>
>>> Yes I know it is always nice to see home brew, even from despicable
>>> appliance operators.:-)
>>>
>>> Some recycling of some of my 500KHz rock bound modules.
>>>
>>> Eddie
>>>
>>> On 09/02/2013 19:22, Stefan Schäfer wrote:
>>>>
>>>> Am 09.02.2013 19:58, schrieb g3zjo:
>>>>> No time reference just very accurate PIC timing which is good for 
>>>>> weeks.
>>>>
>>>> Ah yes. BTW when using e.g. a netbook in /p WSPR tests it is totally
>>>> sufficient to sync the PC clock manually to your wrist watch (which
>>>> was synced at home), if necessary. So it is not really a pro-argument
>>>> for Opera that no timing is required. I've recently tested that at
>>>> home with my own transmissions...
>>>>
>>>>> PA, yes tiny by your standards, but it is the PA that has been
>>>>> growing recently.
>>>> :-)
>>>>
>>>>>> Pictures please!
>>>>> Oh dear do you really like rats nests?
>>>> ...and dirty fingers, yes ;-)
>>>>
>>>> 73, Stefan
>>>>
>>>>>
>>>>> Eddie
>>>>
>>>>
>>
>>
>>
>
>