[Lowfer] TH in EN90xn Solid Copy Now

[Michael Sapp]

Garry & All: Thanks. Only reason I caught TH was that I was working on a 
1950s Sparton table radio on the test bench and happened to look over at the 
computer screen and notice TH traces getting stronger on 189.36 in QRSS3 
slow. So I switched to QRSS3 Normal for awhile and got lucky with the 
evening first-bounce D/E -layer propagation...

Dex wrote me that he sees about 10Hz +/- slow thermal drift on TH and that 
Carl makes manual adjustments to it's frequency from time to time. So be 
aware of the thermal drift issue on TH as running ARGO too far into the time 
domain might not be wide enough to see a signal on the waterfall in QRSS30 
which only is +/- 5 Hz when  189360 is dead center of the waterfall 
scale....QRSS20 slow would probably be a better choice for trace detection. 
I do see other trace carriers here from time to time in that 189350 to 
189370 range, so it can be a bit of a hunt....

73 Mike wa3tts


----- Original Message ----- 
From: "Garry" <k3siw at sbcglobal.net>
To: <lowfer at mailman.qth.net>
Sent: Saturday, October 29, 2016 9:09 AM
Subject: Re: [Lowfer] TH in EN90xn Solid Copy Now


> Nice capture Mike! I listened for TH around midnight local time here but 
> saw nothing, even with ARGO at QRSS30. Surprising since not only was NDB 
> DIW coming in strongly on 198 kHz USB but plenty of low-powered 25 watters 
> in SC were also copyable. For example, GM, CFY, FDW, LQK, and CKI, working 
> down in frequency from 521 kHz. However, as local sunrise neared I did see 
> traces of TH even with ARGO at QRSS3, slow. Not strong enough to make out 
> the Morse letters though.
>
> In between I spent some time looking for TAG but had no copy. Propagation 
> hasn't been favoring E-W paths but N-S paths have been doing fairly well - 
> NDB GPI in Columbia on 309 kHz has been coming through well most of the 
> night.
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
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