[Lf] Nags Head

[Nan and Sandy Sanders]

 Frank, times are in GMT. I think we need to sit down together and go over 
the files before you put them on the net. I also have more files for you. I 
will try to do a 1 db step cal of the receiver this weekend.
				Sandy

----------
From: 	Frank Gentges[SMTP:gentges at itd.nrl.navy.mil]
Sent: 	Thursday, January 06, 2000 10:39 PM
To: 	Nan and Sandy Sanders
Cc: 	'lf at amrad.org'
Subject: 	Re: [Lf] Nags Head




Sandy,

Boy, if you can make it that would be good news.  Bring your loop if you
can.  I would like to try it again with a tuned preamp to reject Loran-C.
It may throw a null at England but still a super bet for LOWFers.

I got a 2500 watt generator since last year and have visions of taking it
down.  I need to add a good filter to clean up any noise.  Glenn has a
low noise inverter.  However, inverter setups seem to be really sensitive
to setup details to be quiet.  My last effort was a disaster.  If Glenn's
was put into same setup it might be noisy too.

As capacitance is added to the 110 volt lines the switching transients
get worse, much worse to more than overcome the attenuation the filter
capacitance might help with.  The DC line cannot tolerate inductance in a
filter as the switching surge sags the instantaneous voltage and the
inverter craps out.  Leads around the vehicle conduct the noise and
radiate it till it is a deafening roar of interference and LF DXing is
hopeless.  A couple of weeks in a screen room...... but YMMV.  Best bet
is inverter and batteries in a metal box.  Richard O'Neill did that last
year in his station wagon.  I will try to bring a 24volt 40 AH Nicad 
battery.

I think I saw a message from you about the time reference  on these
charts.  I am going over them and it looks like the signal dies at 11:05
each day.  That is 1105 Hrs in some time zone.  What is it?

Frank K0BRA

On Thu, 6 Jan 2000, Nan and Sandy Sanders wrote:

>
>
>  Frank, It looks like I may be able to go after all. Will know for sure
> this weekend.
>  What are our ac power needs? I would like to leave the generator at 
home.
> Didn't Glen have an inverter with slow switching transistors ? Would it 
be
> large enough to run all we need? The only thing I would bring is the 
Cubic
> and it only needs about 40 watts. I have about 200Ah of fresh deep cycle
> batteries and one 90Ah that is a little on the old side and could be
> connected for 24V and regulated down to 13.6V.
> 				Sandy
>
> _______________________________________________
> lf mailing list
> lf at amrad.org
> http://www.amrad.org/mailman/listinfo/lf
>

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