Markus - I looked at the audio coming out of my
sound card using Opera 2 and certainly the keying on waveform, in my
opinion is pretty fast rise and the click is very tangible
In
fact what I see is for shorter keying periods the key on rise is slower -
but if theres a substantial gap the next audio tone on is very harsh and the key
click hits the audio agc very hard.. Now, this may be my sound card, but turning
levels down doesnt appear to change the ramp up rate at key on looking on
the scope. I dont get the same with other keyed audio tone problems that
have a more softkeying ramp. Just my observation here, wonder if it can be
made a little softer if its more than my local conditions
here.
Over the pole wise Im still seeing nothing from Europe and
only the first tinges of DCF39 being visible at dot 60 slow - just.
Laurence KL1X Alaska
To:
[email protected]From:
[email protected]Date: Thu, 30
Aug 2012 11:09:20 -0400
Subject: LF: Opera frequency usage
Sorry, no joy
here from John's Op-8 last night, due to several adverse conditions:
- relatively high QRN levels. Little one can do about it - the ol' rule
"listen when QRN is low, transmit when it's high" is probably the best guide for
intercontinental LF work.
- wrong RX frequency: I had set up my 2 Hz wide recording on 137561 and
went to bed before John's update arrived...
In my opinion, splitting subbands
for different Opera submodes is not a good idea. I don't see a technical need
for it, and it eats up a lot of bandwidth, especially with the software's
automatic frequency selection. Anyway the 137.5-.6 band overlaps typical WSPR
usage (137.4-.6). And the area above 137.6 (especially the DCF gap around
137.63) would be the best choice for QRSS-3 or 10 QSOs.
- DK7FC was active on a nearby frequency during most of the night. In
conjunction with the noise blanker the RX is desensitized by the a nearby strong
signal. The problem is exacerbated by high density of keyclicks in Opera (5 to
8x more than QRSS), and that most seem to apply hard keying. Trying to
interleave operating times (eg. even vs odd days, or hours) is probably not a
satisfactory solution.
If we seriously consider using Opera for intercontinental work, I believe
that we should include it in the existing splitband scheme, with widely spaced
subbands for East-to-West and West-to-East operation (the well-proven "TA" and
"Eu" slots). For example, we could place a narrow Opera slot beneath each of the
QRSS segments. So, open to discussion, here is one proposal for slow-mode band
usage:
137.77-137.78 W->E DX QRSS, DFCW 30..180
137.76-137.77 W->E
DX Op 32
137.60-137.75 mid range QRSS, DFCW 3..10
137.50-137.60 mid range Op
2..8
137.40-137.50 WSPR
136.17-136.18 E->W DX QRSS, DFCW 30..180
136.16-136.17 E->W
DX Op 32
Best 73,
Markus (DF6NM)
-----Ursprüngliche Mitteilung-----
Von: John Andrews <
[email protected]>
An: rsgb_lf_group
<
[email protected]>
Verschickt: Do, 30 Aug 2012 4:15
am
Betreff: Re: LF: LF acty
Stephan,
Actually, Jay was talking about transmitting OP8 also tonight. Not sure
of his plans. I will run XES until well after your sunrise.
John, W1TAG/WD2XES
On 8/29/2012 7:17 PM, Stefan Schäfer wrote:
> Hello John, Joe, LF,
>
> Wow, now there is much going on tonite again. Another time i don't know
> if i should RX or TX and in which mode...
> I think i will not have a chance to decode W1TAG in OP8, however VO1NA
> in OP32 could be possible and would be my best rx-distance in OP.
> Furthermore i want to provide test signals for YV7MAE, so i'm now
> sending DFCW-90, after sending DFCW-180 to VK.
>
> John, will you transmit OP8 until the morning? Has Jay a chance to
> receive me in OP8 later or will you nearly overload his RX? :-)
>
> 73, Stefan/DK7FC
>
> PS: Our russian friends are doing a good job! Many stations, with good
> receivers and transmitters!
>
>
> Am 30.08.2012 00:33, schrieb John Andrews:
>> Forgot about the split Opera band for the two data rates. The actual
>> frequency tonight will be 137.621 kHz. Stick with 136.0 USB for a dial
>> setting.
>>
>> John, W1TAG/WD2XES
>
