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Re: LF: Titanic acty

To: <[email protected]>
Subject: Re: LF: Titanic acty
From: "Walter Staubach" <[email protected]>
Date: Sun, 15 Apr 2012 21:19:47 +0200
References: <000c01cd1a16$4402a880$0401a8c0@xphd97xgq27nyf> <158CD65E21CC4DF18FEFD2AC05A133B2@AGB> <33B9FBF225314F3CAF2E89A0BE6AE36D@standard9dmup1> <[email protected]>
Reply-to: [email protected]
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Wolf,
my progblem is - I have only one wire for 600m, 80m and 40m. So switching with all the inside- and outside coils and tuning takes a lot of time. I think it is the same with DI2AF.
73
Walter DI2AG / DJ2LF

----- Original Message ----- From: "wolf_dl4yhf" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 15, 2012 1:40 PM
Subject: Re: LF: Titanic acty


Greetings all,

Nice activity on MF last night. Would have liked a bit more crossband activity (especially from the DI stations) but none of them seems to have been active for xband QSO with those poor fellows without tx permission on 500 kHz.

I could significantly improve the rx quality at the club station (DF0WD) so a couple of QSOs was possible with "armchair" copy this end (rx on MF). Thanks everyone involved, especially Finbar and Graham.

The big difference was a large resonant tuning coil (which will one fine day be used as a loading coil). 20 cm long, 15 cm diameter, 60 turns of 1.8 mm enamelled copper wire neatly separated by a plastic wire ("Maurerschnur" in german, can't translate that into english). L approx. 320 uH, and Q at 500 kHz about 500 (calculated). The primary's ends were connected to a 10 meter vertical wire, and the "MF earth" on an earthstake located as far away from the shack and mains as possible. A secondary winding with few turns (tapped for 50 ohms) acted as insulation between "shack earth / mains ground" and "antenna earth", spaced a centimeter above the primary coil layer. When connecting "ground" and "antenna earth", there was tremendous QRM (only OK2BVG, G3KEV, and IQ2MY audible). With separate grounds, DI2AG, DI2AF, DI2AM, many UK, PA and OK stations were nicely audible after sunset.

(crossband) QSO were made with EI0CF, GB100MGY, OK2BVG, IQ2MI. Sorry to have missed you Mal, you were very solid copy during your QSO with Finbar.

All the best,
  Wolf






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