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Re: LF: OP8 on 478.477 kHz

from [Graham] [Permanent Link][Original]
To: <[email protected]>
Subject: Re: LF: OP8 on 478.477 kHz
From: "Graham" <[email protected]>
Date: Tue, 11 Nov 2014 22:55:52 -0000
Importance: Normal
In-reply-to: <[email protected]>
References: <2798AC58C0E648CFA0FB96187FCCD7CD@AGB> <[email protected]> <[email protected]> <C9A203DC79C943E7A2D55EE2395023D4@AGB> <[email protected]>
Reply-to: [email protected]
Sender: [email protected] 
Hi Joe ,
Well, spot s/n this side where similar ? not sure if the monitors decode the first tx's or may be later last night ? Ive noticed on 500/477 that some times , areas become no-go at times , not too sure as to why , may be some of L's , pesky protons turn up in the wrong place ? skip is very defined as well , strange ,bit like 6 meters .
Opera was designed to run on standard ham kit tx/rx set ups . the test 'CW' waveform was the 20 wpm self test from the Racal MA1723 , which has envelope shaping , the DSP samples at a much higher rate than the TX baud rate , so pulses , static etc only affects a small % of the signal , its not possible to 'loose lock' as each pulse is self syncing
Yes .. Rf can be fascinating. , unless its just set fire to the shed or producing purple flames , at the end of the Ae )
On frequency ?, no such thing with the Opera system . as long as the carrier is inside the red-lines on the waterfall or a few Hz in from the band edges , then that's all that is needed , best to keep away from the dead-centre, that can be a little busy , a guard band of 3 or 5 Hz should be enough, may be a little in from the band edges as well to allow for RX off sets
Phase and ultra stability , that's only for the Train-Spotters and 'Pixel' deep sea monsters from below 2000 mtrs :) the DSP will take care of drift / phase and envelope distortion ,noting that narrow filters will reduce the minimum decode levle , due to 'ringing' and slew the s/n , which is based on 2.4 KHz ssb b/w
The ras-pi project is suffering from distributed attention , Dave seems to of fixed memory leakage and other strange attributes , the last air-tests produced quite good signals , but its only one of many things , hes linked to , on the brighter side , the latest issue of the U3 , has opera and can be programmed for multi mode sequential beacons , allowing wspr+opera etc , next is linking to the psk-map to show tx activity .. 

Good  luck  tonight   Joe

73-Graham



--------------------------------------------------
From: <[email protected]>
Sent: Tuesday, November 11, 2014 6:28 PM
To: <[email protected]>
Subject: Re: LF: OP8 on 478.477 kHz


Hi Graham,

It seems like poorer condx but it could be TX trouble too. There's
a sharp spike & ringing on the leading edge of the square wave as
it goes from the 4427 to the hexfet gate. Putting more uF  across
the Vdd of the 4427 didn't help and there is still hissing unless
one stands on the left foot with one's hand in the pocket.
RF is fascinating.

Let's have another go tonight.  Oh by the way, am I on frequency?
I miss the accurate QRG reports of Markus'  OPDS.

73
Joe

On Tue, 11 Nov 2014, Graham wrote:


Joe,
Condx changed from last night ? Quick check on the psk data base showing , No decodes east coast usa 
still  into   UK  & EU

Reliable  path  though ?

73-G,


     G8HUH 600m OPERA 3550 km 01:45:46
     F6CNI 600m OPERA 4052 km 02:06:48
     2E0ILY 600m OPERA 3533 km 02:38:21
     PA3ABK 600m OPERA 4045 km 02:59:23
     F5WK 600m OPERA 4017 km 02:59:23
     G3XDV 600m OPERA 3720 km 02:59:23





     -34 OPERA 0.477 11/11/2014 00:00 Canada VO1NA GN37OR G8HUH IO81MG
     -29 OPERA 0.477 11/11/2014 00:53 Canada VO1NA GN37OR G3XDV IO91VT
     -29 OPERA 0.477 11/11/2014 01:03 Canada VO1NA GN37OR G8HUH IO81MG
     -25 OPERA 0.477 11/11/2014 01:24 Canada VO1NA GN37OR G8HUH IO81MG
     -30 OPERA 0.477 11/11/2014 01:24 Canada VO1NA GN37OR G3XDV IO91VT
     -33 OPERA 0.477 11/11/2014 01:24 Canada VO1NA GN37OR 2E0ILY IO82QV
     -26 OPERA 0.477 11/11/2014 01:45 Canada VO1NA GN37OR G8HUH IO81MG
     -29 OPERA 0.477 11/11/2014 02:06 Canada VO1NA GN37OR F6CNI JN19QB
     -34 OPERA 0.477 11/11/2014 02:38 Canada VO1NA GN37OR G3XDV IO91VT
     -31 OPERA 0.477 11/11/2014 02:38 Canada VO1NA GN37OR 2E0ILY IO82QV
     -32 OPERA 0.477 11/11/2014 02:59 Canada VO1NA GN37OR G3XDV IO91VT
     -32 OPERA 0.477 11/11/2014 02:59 Canada VO1NA GN37OR F5WK JN18HP
     -34 OPERA 0.477 11/11/2014 02:59 Canada VO1NA GN37OR PA3ABK JO21IT








--------------------------------------------------
From: <[email protected]>
Sent: Monday, November 10, 2014 7:28 PM
To: <[email protected]>
Subject: Re: LF: OP8 on 478.477 kHz


Hi Laurence and Graham, Group,

An XE reception would be nice, but more ERP would improve the
odds.  OK with me on the claim, Graham -- thanks for promoting the
op stuff.  Will try again tonight, pending the mood of the TX wrt
hissing fits &c.

73
Joe

On Mon, 10 Nov 2014, Laurence KL7 L wrote:
No decodes last night but it was a stretch - if its any consolation I did see timed carriers around 478.5 in qrss but they were weak 

Laurence KL7L/XE3
Wspr tonight 475kHz


On Nov 10, 2014, at 10:53, "Graham" <[email protected]> wrote:


Joe,
Nice to see your call pop up on 477 ! first decode of you for me , so that completes the 'First Atlantic two way data qso' 
on MF  ,
Only a short time between tx/rx each way change of mode and a re-allocation of the band etc , but apart from that , jobs a good one as they say hihi 

73-Graham
G0NBD


10  Rx  stations

DL-SWL 600m OPERA 4400 km 02:57:24
DF2JP 600m OPERA 4188 km 04:00:30
PA3ABK 600m OPERA 4045 km 05:24:37
F4DTL 600m OPERA 4005 km 02:57:23
LA3EQ 600m OPERA 3958 km 04:00:30
F1AFJ 600m OPERA 3949 km 05:56:11
G3XDV 600m OPERA 3720 km 02:15:20
2E0ILY 600m OPERA 3533 km 05:03:35
G0NBD 600m OPERA 3495 km 01:33:15
W3NF 600m OPERA 2149 km 01:54:17


39  reports  held  in the  psk-map  data  base ,
-29 OPERA 0.477 09/11/2014 22:44 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -29 OPERA 0.477 09/11/2014 22:45 Canada VO1NA GN37OR DF2JP JO31HH RX Op8 -29 OPERA 0.477 09/11/2014 23:16 Canada VO1NA GN37OR G0NBD IO83LK RX Op8 -29 OPERA 0.477 09/11/2014 23:16 Canada VO1NA GN37OR F1AFJ JN06HT RX Op8 -29 OPERA 0.477 10/11/2014 00:09 Canada VO1NA GN37OR W3NF FM19MH Op8_||||||||||_~27dB -32 OPERA 0.477 10/11/2014 00:09 Canada VO1NA GN37OR F1AFJ JN06HT RX Op8 -30 OPERA 0.477 10/11/2014 01:33 Canada VO1NA GN37OR G0NBD IO83LK RX Op8 -32 OPERA 0.477 10/11/2014 01:33 Canada VO1NA GN37OR W3NF FM19MH Op8_||||||||||_~27dB -30 OPERA 0.477 10/11/2014 01:43 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -30 OPERA 0.477 10/11/2014 01:43 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -27 OPERA 0.477 10/11/2014 01:54 Canada VO1NA GN37OR W3NF FM19MH Op8_||||||||||_~27dB -30 OPERA 0.477 10/11/2014 02:04 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -31 OPERA 0.477 10/11/2014 02:04 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -34 OPERA 0.477 10/11/2014 02:15 Canada VO1NA GN37OR LA3EQ JO28XJ RX Op8 -27 OPERA 0.477 10/11/2014 02:15 Canada VO1NA GN37OR G3XDV IO91VT RX Op8 -31 OPERA 0.477 10/11/2014 02:25 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -30 OPERA 0.477 10/11/2014 02:25 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -27 OPERA 0.477 10/11/2014 02:46 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -25 OPERA 0.477 10/11/2014 02:46 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -33 OPERA 0.477 10/11/2014 02:57 Canada VO1NA GN37OR F4DTL JN18FP RX Op8 -31 OPERA 0.477 10/11/2014 02:57 Canada VO1NA GN37OR DF2JP JO31HH RX Op8 -32 OPERA 0.477 10/11/2014 02:57 Canada VO1NA GN37OR DL-SWL JO52HP RX Op8 -32 OPERA 0.477 10/11/2014 03:07 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -31 OPERA 0.477 10/11/2014 03:18 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -31 OPERA 0.477 10/11/2014 03:18 Canada VO1NA GN37OR F1AFJ JN06HT RX Op8 -28 OPERA 0.477 10/11/2014 03:28 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -27 OPERA 0.477 10/11/2014 03:49 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -33 OPERA 0.477 10/11/2014 04:00 Canada VO1NA GN37OR LA3EQ JO28XJ RX Op8 -30 OPERA 0.477 10/11/2014 04:00 Canada VO1NA GN37OR DF2JP JO31HH RX Op8 -32 OPERA 0.477 10/11/2014 04:11 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -24 OPERA 0.477 10/11/2014 04:11 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -32 OPERA 0.477 10/11/2014 04:32 Canada VO1NA GN37OR F1AFJ JN06HT RX Op8 -29 OPERA 0.477 10/11/2014 04:42 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -34 OPERA 0.477 10/11/2014 04:42 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -30 OPERA 0.477 10/11/2014 05:03 Canada VO1NA GN37OR 2E0ILY IO82QV RX Op8 -29 OPERA 0.477 10/11/2014 05:03 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -33 OPERA 0.477 10/11/2014 05:24 Canada VO1NA GN37OR PA3ABK JO21IT RX Op8 -33 OPERA 0.477 10/11/2014 05:56 Canada VO1NA GN37OR F1AFJ JN06HT RX Op8 





--------------------------------------------------
From: <[email protected]>
Sent: Monday, November 10, 2014 3:20 PM
To: <[email protected]>
Subject: Re: LF: OP8 on 478.477 kHz


Hi Graham, Jean-Pierre and group,

Thank-you JP and Graham for the reports.  This was the first attempt
with the new exciter comprising 7493, 7400 and 4427 chips wired on a bit of perfboard on the bottom of this (poor) photo. Above this are 2 earlier breadboards with 74161 and 4011 chips and above that a 10 MHz ref.osc amp and 4020 divider chip. To the left are the Arduino and DDS60 boards and an antenna changeover relay. The jack for the CW key is on the LHS of the 
perfboard.
Seeing 10 reports on pskreporter last night was gratifying but there is 
still work ahead... the TX has hissing fits from time to time. QRO is
in the future when some cores and caps can be sourced for a new PA.

73
Joe VO1NA


On Mon, 10 Nov 2014, F1AFJ wrote:


Hi Joe ,
Good receipt of your signal this night , in spite of my WSPR beacon in 
working .

73  J-P f1afj

Le 09/11/2014 21:35, [email protected] a écrit :

Dear Group,

The TX seems to have stopped hissing and appears to be working.
40 watts to the monopole until 1000 UTC 10 Nov.

Reports welcomed.
73
Joe VO1NA







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