Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: MF: EbNaut

To: [email protected]
Subject: Re: LF: MF: EbNaut
From: Paul Nicholson <[email protected]>
Date: Wed, 02 Mar 2016 13:02:34 +0000
In-reply-to: <CAA8k23TFKizMx9COj2Gt6A0ge2OP9S-GoVCqKsPWVzYGk7h7Jw@mail.gmail.com>
References: <[email protected]> <[email protected]> <[email protected]> <CAA8k23TFKizMx9COj2Gt6A0ge2OP9S-GoVCqKsPWVzYGk7h7Jw@mail.gmail.com>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2

Congratulations Joe and Markus!  A new record, I make
that 4555 km and with a dB or two to spare.

That's really is a milestone for coherent at MF.  I wonder
if the propagation would stand longer symbols at that
distance.   Perhaps try 2 seconds?

> 00:30  2.2  0.8   0

Only losing 1.4 dB at most.   Maybe things get better at
very long range.

The next target would be 5418 km to Domenico.

Andy wrote:

> Consider using a Tee input low-pass filter,

I was using a Pi.   The next build will use a T if I'm
not using an antenna loading coil.

> A shunt C input will give large current spikes when hit
> with the square wave from a voltage mode Class-D PA

That explains then, why the spike went away when I reconfigured
for current mode.

Now it is all beginning to add up.  My next attempt at a PA
hopefully wont have so many elementary mistakes.
--
Paul Nicholson
--

<Prev in Thread] Current Thread [Next in Thread>