Tom,
Thanks for all your contributions and comments. I searched the DXE web
site and was unable to find the limiter you mentioned. Could you be
more specific?
Also, a clarification about data on your web site re the RDF table in
the "How low noise receiving antennas really work" page - I assume the
"small 4 square" refers to a designs (yours) such as the DXE active 4
and 8 squares with whip antennas. Could you confirm that?
I'm considering 80/160 receiving antennas and have the space for three
Beverages 0.75 to 1.0wl 160m long bidirectional (NE/SW, E/W, NW/SE) made
from coax, QTH is Redmond, WA. Also, I'm considering the DXE 4 and 8
square active arrays with a radius of 0.15 wl (80') on 160m but can't
get more than about 1/4 wl from a 160m vertically polarized delta loop.
My 80m rotatable dipole is at 100' up and the tower base at least 100'
from the nearest 8 square antenna, so hopefully that interaction is minimal.
Your inputs would be appreciated.
Grant Saviers KZ1W
On 11/14/2012 5:07 AM, Tom W8JI wrote:
By the way Buck, there is more to this than some people will tell you.
The DXE switch uses a unique RF limiter that kicks in hard at about 23
dBm. Below that level there is no intermod at all!! It will not
deteriorate the receiver, like normal cheap back-to-back diode systems.
If you need a receiver limiter and do not want to hurt receiver
dynamic range on modern receivers, it takes far more circuitry than
cheap back-to-back diodes.
73 Tom
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Topband reflector - topband@contesting.com
_______________________________________________
Topband reflector - topband@contesting.com
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