[Lowfer] Beacon DIR on the air...

[Paul Daulton]

Jim I show you at 410 miles on Bali distance calculator. I have rec set for qrss 30 at 172.945khz for tonight. We'll see I hope. Good luck
Paul k5wms

Quoting Bill Ashlock <ashlockw at hotmail.com>:
> 
> Jim,
> 
> Are you sure that it is 9 ma? This would be .09v (90mv) measured across a 10 ohm
> series resistor. Check things out by NOT using a matching coil - just a loading
> coil in series with the antenna and your final. If your antenna + loading coil Q
> is up to par you should see a lot more current going into the final at
> resonance. 
> 
> Bill
> 
> > From: w4jbm at bellsouth.net
> > To: lowfer at mailman.qth.net
> > Date: Sat, 3 Oct 2009 12:58:14 -0400
> > Subject: Re: [Lowfer] Beacon DIR on the air... 
> >
> > > > The final is a slightly modified LEK design. It's operating at 11
> > > > volts and pulling 9 mA (measured at the xmitter). 
> > >
> > > Any hope of getting it up to full power?
> >
> > I can crank the voltage up a bit without things overheating (I'm using a 12
> > volt supply and have a diode in-line for protection, so between that and
> > line-loss I'm down to the 11 volts). I've tried different taps on the
> > matching coil and this is where I get the best signal strength. (I can draw
> > more current going closer to ground, I just see the near field signal
> > strength drop instead of rise when I do that.)
> >
> > I think the fundamental problem is that the antenna impedance is too low and
> > I'm not able to get it matched at all. Building an RF current meter and also
> > looking at something like a 1:3 RF transformer are on the to do list. 
> >
> > So the short answer is that I think I'm down 10 dB for now. Or maybe a 2E26
> > would load up better. :-)
> >
> > 73 de
> > Jim W4JBM
> >
> > Receiver - Ten Tec RX320D
> > Antenna - Butternut Vertical (SW) and mini-whip (LF)
> > Location - Bowdon Junction, GA  USA (33.6581,-85.1249 EM73)
> >
> > http://www.hamuniverse.com/w4jbm/
> >
> > "With a soldering iron in one hand, a schematic in the other, and a puzzled
> > look on his face..."
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Paul Daulton K5WMS
beacon WMS 187.492 khz qrss30/slow 24/7
Jacksonville,Ar 72076
em34wu