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dual receiver SDRs for diversity reception / phasing  View Printable Version 
Thursday, January 17 2019

IRCA
I haven't seen an answer so I will jump in.

Digital phasing has the advantage that the phase shift is independent of hardware and perfectly linear across the MW band, Slight changes to ferrite permeability are not a problem when you do the phase shift with a simple transform.

Recording 2 channels and phasing them post facto really doesn't require a different wav file for each channel. It does require that the PC software be able to locate the samples in each file that were sampled at the same time..

As far as your problems with finding time to play back files, I'll pass on that and view it as a generic problem that is not caused by phasing.

Chuck

 

TP 16 Jan Victoria version.  View Printable Version 
Thursday, January 17 2019

IRCA
Dialing back a bit from yesterday... no sign of any Chinese today


pretty darn good audio (all of it understandable by a native speaker, at least briefly):

774 came close

Reasonable audio at times during the period (much of it understandable by a native speaker, though often battling with splash or noise):

594 JOAK 1558UT

774 JOUB 1520UT

not so reasonable audio, occasional words or phrases in splash or noise could be understood by a native speaker:

567 JOIK 1549UT

747 JOIB 1532UT, rare fade up

828 JOBB 1525UT, only appearance this morning

972 HLCA 1524UT

1566 HLAZ male/female vocal, woman in Chinese 1553; exactly one hour later, man in Russian

Burbles in the splatter and noise (if lucky, language might be guessed at by cadence of talk, or parallel established by changes in talk or music)

603 soft vocal music, likely HLSA

666 JOBK //594 1535UT

693 JOAB //774 1537UT

702 NHK2 //774 1522UT

891 JOHK //594 1539UT

954 man talking, Japanese intonation 1552UT

1242 JOLF 1600UT, cuckoo pips after man and woman in apparent Japanese

1287 man and woman talking, Japanese intonation 1554UT

1422 man and woman , Japanese intonation 1606UT

1575 man and woman talking, SE Asian language? 1556UT

Strongish het, no or "near imaginary" audio (either undermodulated or ravaged by splatter)
1134 1332 1386 1494 1503 1593 seemed to be Asian;
1017 seemed to be DU


best wishes,

Nick


Nick Hall-Patch
Victoria, BC
Canada

 

Re: dual receiver SDRs for diversity reception / phasing  View Printable Version 
Thursday, January 17 2019

IRCA

 

Re: dual receiver SDRs for diversity reception / phasing  View Printable Version 
Thursday, January 17 2019

IRCA
You could save some words and make your message simple by simply saying that no one is doing after the fact phasing.

Lest anyone wonder why live phasing has a bit of support but after the fact phasing doesn't: it's because the former only requires the RF signals to be synchronized while the latter requires USB and PC to be synchronized.

Chuck


 

Yet another!!  View Printable Version 
Thursday, January 17 2019

IRCA


<https://en.wikipedia.org/wiki/KQRR>

On 16/01/2019 7:06 PM, Phil Bytheway via IRCA wrote:

Subject:
Yet another!!
From:
Phil Bytheway <phil_tekno@yahoo.com>
Date:
16/01/2019, 7:06 PM
To:
"irca@hard-core-dx.com" <irca@hard-core-dx.com>

To:
"irca@hard-core-dx.com" <irca@hard-core-dx.com>


I'm being haunted.
So, for the 3rd time, I'm listening to what sounds like Russian on 1520 with Everett nulled.... for like 20 minutes (1750-1810 PLT). Music and a woman talking just after the hour.

No break, no ID.... is it me or what??

Phil Bytheway




 

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