[Lowfer] WH2XND in EN90xn....

[Michael Sapp]

Hi Jim: OK, thanks for info.  I switched to only a single receiver ( FT-847 
with 1800Hz Inrad xtal filter) and my better external sound card and had XND 
copies up until about 1000 UTC. Best around -19 although they have not 
posted yet on the database. Last time that happened the spots posted later 
in the day....

Antenna here is an 18' x 70' x 18' EWE with 10.5:1 type75 binocular 
transformers on each end with a pair of 150~175 ft RG6QS feed lines to shack 
with a common mode choke scheme.

LF converter listening on SW transformer and NE transformer terminated in 
about 80~90 ohms in the shack.

Homebrew LF converter consists of 3.0 MHz Isotemp OCXO, single-ended Norton 
2N5109 LO driver amp, RAY6 MiniCircuits Level 23 DBM, W1VD (web page) design 
2N5109 LF preamp,  7th order 500kHz Butterworth LPF, 3.3MHz diplexer,  and a 
high-Q IF preselector (W1VD 500khz preselector scaled to 3.2~3.5 MHz)....

A few -30 SNRs last nite so my "filter compression" on the SNR numbers not 
too adverse---but necessary to quell the suburban noise environment here....

XIQ tells me XND was likely running more power than indicated with antenna 
improvements made...

73, Mike wa3tts



----- Original Message ----- 
From: "Jim Davey" <k8rz at etcmail.com>
To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Cc: "Frank Lotito" <k3dz at live.com>; "Steve Gocala KB8VAO" 
<kb8vao at ix.netcom.com>
Sent: Tuesday, January 27, 2015 8:43 AM
Subject: Re: [Lowfer] WH2XND in EN90xn....


> Hi Mike:
>
> Have also heard him last two nights north of Atlanta in EM84aj, a little
> closer than you.  Best report shown; most at -21 to -25
>
> 2015-01-27 04:38   WH2XND   0.475630   -14   0    DM33xt    1   K8RZ
> EM84aj    2578   81
>
>
> Rx here is SDR-IQ and Clifton Z1501F e-probe with 0.5m whip.
>
>
> 73 Jim K8RZ
>
>
>
>
>
>
> On 1/27/15, 1:06 AM, "Michael Sapp" <wa3tts at verizon.net> wrote:
>
>>Hi All: Not sure what his actual ERP is but...
>>
>>       2015-01-27 05:24   WH2XND   0.475625   -28   0   DM33xt   1
>>WA3TTS   EN90xn   2915   66
>>
>>
>>
>>I was running two receivers with the IF out from my RAY6 Mini Circuits
>>DBM converter split.  The WA3TTS capture was my
>>
>>FT-847 receiver in USB mode with 1800Hz Collins xtal filter and some
>>moderate audio DSP and noise reduction.  ACER Aspire One
>>
>>(Atom) PC with the internal sound card at 16 bits and 48K sample rate.
>>
>>
>>No copy on WH2XND with my FT-817 and TCXO-9 IF receiver with 500Hz
>>Collins CW Mechanical  filter
>>
>>(~2500Hz wide at 60dB down ) into the Xonar USB external sound card and
>>ACER V5 dual core at 24 bits 48K sample rate running as WA3TTS/2.
>>
>>
>>IF Splitter was a Merrimac PBD-20-100 and LF converter LO an Isotemp
>>OCXO127-19.
>>
>>
>> So the better RF front end and audio DSP in the FT-847 and lower quality
>>16bit internal sound card and Atom based PC beat the FT-817 and 24bit
>>external Xonar sound card with and dual-core PC.....
>>
>>
>>Based on other prior experience, if I had the Xonar 24bit external sound
>>card and ACER dual core machine on the FT-847 I might have been able to
>>squeak another 2dB SNR into the XND capture....
>>
>>
>>Very neat  630M WSPR2 Capture.... first "1W" 630M station received here
>>at that kind of distance, usually 1200 miles or so is about my limit for
>>a "1W" 630M station....
>>
>>73 Mike wa3tts
>>
>>
>>
>>
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