[Lowfer] WOLF!

[John Andrews]

Jay,

Tnx for the report. I'm running into issues with the timed mode set at 
30 minutes. Works OK for a while, and then at a 15 minute point, 
substitutes the RX sample rate for the TX, and the frequency goes awry. 
At this point, I'm just going to let it run. Have a small fan at half 
speed on the center coil in the LPF. All else seems cool. The 
transformer in the outside tuning network is probably warm, but I doubt 
if there will be any disasters at 32F.

JA

On 1/1/2016 7:18 PM, jrusgrove at comcast.net wrote:
> JA
>
> Tnx WOLF signal. Even with reception off the back of the antenna it's
> not much of a challange at this distance.
>
> t:  24 f: 0.005 a:-0.1 dp: 79.5 ci: 4 cj:278 WD2XES HNY WOLF -
> t:  48 f: 0.005 a:-0.1 dp: 81.8 ci: 4 cj:278 WD2XES HNY WOLF -
> t:  96 f: 0.005 a:-0.1 dp: 81.9 ci: 4 cj:278 WD2XES HNY WOLF -
> t: 192 f: 0.010 pm:61.03 jm:404 q: 14.2 14.0 WD2XES HNY WOLF -
> t: 288 f: 0.000 pm:178.3 jm:404 q: 19.3 19.2 WD2XES HNY WOLF -
> t: 384 f: 0.000 pm:249.6 jm:404 q: 16.9 16.9 WD2XES HNY WOLF -
> t: 480 f: 0.000 pm:322.7 jm:404 q: 21.5 21.4 WD2XES HNY WOLF -
> t: 576 f: 0.000 pm:432.9 jm:404 q: 22.6 23.0 WD2XES HNY WOLF -
> t: 672 f: 0.000 pm:461.5 jm:404 q: 23.4 23.9 WD2XES HNY WOLF -
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
> ----- Original Message ----- From: "John Andrews" <w1tag at charter.net>
> To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands"
> <lowfer at mailman.qth.net>
> Sent: Friday, January 01, 2016 3:13 PM
> Subject: [Lowfer] WOLF!
>
>
>> As no year should ever go by without someone running WOLF at LF, my
>> 2016 contribution will be made tonight. WD2XES will run WOLF(10) on
>> 137.350 kHz, starting at 2000Z. The setup is rigged to start at the
>> top of each hour, and run for 30 minutes. The second half of the hour
>> will be used for receiving, and for tuning network cool-down!
>>
>> For those who are new to the subject, WOLF is a BPSK mode, 10 bits per
>> second in this case. It sends a highly error-corrected 15 character
>> message over and over, repeating every 96 seconds. The text of the
>> message is under the xmit operator's control. If you join the half
>> hour in progress, you still probably decode the signal. The point of
>> the repetition is to "build up" the copy over a long period of time,
>> allowing weak signal reception on the order of QRSS60 detection limits.
>>
>> WOLF GUI software is available at:
>> http://www.qsl.net/d/dl4yhf/wolf/index.html
>>
>> Do NOT dredge up the earlier command-line version on Stewart Nelson's
>> site unless you are a real glutton for punishment.
>>
>> For casual use with a "big" signal, you may just be able to run the
>> program without any frequency or sampling rate corrections. But
>> nailing down your actual sampling rate will significantly improve your
>> luck with weak signals. Your receiver calibration should be within 1
>> Hz for best results. Due to some changes at this end, the WD2XES
>> frequency is about 5 milliHertz high, due to DDS synthesizer
>> round-off. The old exciter was more accurate, but is now enjoying a
>> well-deserved retirement.
>>
>> I'd be happy to answer any questions, and of course to get reception
>> reports. Have fun.
>>
>> John, W1TAG/WD2XES
>>
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