2400Re: [O_P_E_R_A_] RE: JA1ODJ >> KL7L Alaska 3461 Miles 136 KHz , -37 dB s/n 5%Fade
- Nov 7, 2013So far I see a bunch of flags and callsigns and what frequency they are listening on, but it doesn't say OPERA for most.
On 6 Nov 2013 at 14:05, g0nbd@... wrote:
To: <O_P_E_R_A_@yahoogroups.com>From: <g0nbd@...>Date sent: 06 Nov 2013 14:05:21 -0800Subject: [O_P_E_R_A_] RE: JA1ODJ >> KL7L Alaska 3461 Miles 136 KHz , -37 dB s/n 5%FadeSend reply to: O_P_E_R_A_@yahoogroups.com
Originally it was provided to give a over view of psk data mode activity , but its now evolved to show all modes on all bands , use the pull down menus to select mode /time etc , for a general over view , ensure you have selected 'anyone' in the call option
there is a data base that can be searched by SQL via the web , this recovers a excel spread sheet file
Just set the parameter senderCallsign=xxxxx rather than receiverCallsign=xxxxx
callsign=xxxxx does both send and receive reports
---In email@example.com, <bcarling@...> wrote:
Thanks. I am ready to try it but didn't understand some of that . First of all, what is "psk-reporter?"
On Nov 6, 2013, at 4:00 PM, <g0nbd@...> wrote:
No the mode is in use from audio to light , usage may be tracked with the psk-reporter , usage on the lower bands is notable as the on/off keying and low s/n offers a alternative to the traditional qrss system , and provides accurate s/n (average) and fade pattern as % along the time lime . OP32 lower decode limit is round -40 dB s/n [ref to path-sim] with the advent of the 73Khz band OP64 -43 s/n was added to the range and linked to the psk-reporter as 4000 meter's,
A combination of AFC/FEC and noise limiting provides excellent results in difficult circumstances , using only 'normal' Ham band equipment , the shorter 30 second / 60 second modes provide good scatter propagation on vhf/uhf , the afc tracking aircraft Doppler
136 activity increases during the winter months (northern) at the moment Pacific stations are achievingquite substantial range with limited power levels and Ae systems , the modes immunity to Doppler spread makes it very suitable for propagation via polar path where spreading disrupts mfsk/fsk
73-G,Question - is OPERA only used on the 136 kHz band?
On 4 Nov 2013 at 14:15, g0nbd@... wrote:
Up to -32 dB now !
Rx at Mon, 04 Nov 2013 13:19:46 GMT
From JA1NQI in Japan
Loc QM05DV by KL7L
Distance: 3444 miles bearing 272°
Frequency: 0.136 MHz (2200m), OPERA, -32dB
Dont think you can do much better than a mini-whip , its all down to local noise , I think some of the JA stations have remote systems , the other view is all that wire could be radiating on 136 , by coupling ?
G,Hi G,TNX for the links. Lots of interesting equipment at LFengineering. I'm wondering about there preamp for VLF/LF. This is what I'm thinking. Build the DK7FC VLF active E probe circuit and use their preamp or simply use their preamp and add a 4 to 1 audio transformer for second output connection to a sound card for the Dreamers Band RX? I'm wondering if this setup would be any better then DK7FC circuit?Are you kidding me...? I Hope the JA station picture is just an optical allusion. Look at all those mains wires. I would be afraid to stand next to his tower much less climb it. How on Gods green earth does he hear anything @ 136 KHz? You go dude..!Rich
From: "g0nbd@..." <g0nbd@... >
Sent: Friday, October 25, 2013 3:49 PM
Subject: RE: Re: [O_P_E_R_A_] RE: JA1ODJ >> KL7L Alaska 3461 Miles 136 KHz , -37 dB s/n 5%FadeTx station details
Carrier 200W specifies power as 100W (50% duty cycle).
Good contact with manageable 'safe' power levels !
I wonder what kind of antenna he's using?Rich
From: "g0nbd@..." <g0nbd@... >
Sent: Friday, October 25, 2013 12:24 AM
Subject: [O_P_E_R_A_] RE: JA1ODJ >> KL7L Alaska 3461 Miles 136 KHz , -37 dB s/n 5%Fade
JA1ODJ >> KL7L Alaska 3461 Miles 136 KHz , -37 dB s/n 5%Fade F irst JA/USA decode using OP32 on 136KHz , [no details of tx station yet] 73-G,
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