[Lowfer] Beacon DIR on the air...

[Mike-WE0H]

What are you resonating the vertical with?

Mike
WE0H



Jim wrote:
>>> 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..."
> ______________________________________________________