There is a 6 page article about
Op , but its in Spanish
73
-G.
--------------------------------------------------
From:
"Minto Witteveen" <
[email protected]>
Sent: Saturday, February
09, 2013 11:37 PM
To: <
[email protected]>
Subject: LF:
Re: WSPR Test
> 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:
[email protected]> 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:
[email protected]>> 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
>>>
>>>
>
>
