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Date: Sun, 10 Feb 2013 00:00:47 +0000
From: g3zjo <g3zjo@psk31.plus.com>
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Subject: Re: LF: Re: WSPR Test
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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
>>>
>>>
>
>
>