CW is my love, always will be, RTTY is #2.
That said, I've decided to give the new
modes a go, especially seeing as the
software to do so is open source and
provided for us to use.
Its been a long time since I worked a new
one on 160 but I needed E5-S and saw them
on 160 running the FT8
Sold , awaiting funds
Tnx Ed N5DG
On 9/11/2017 5:31 PM, Ed Stallman wrote:
Selling my Hi- Z Receive 4 sq , removed from service this past spring
. Replaced with 8 circle array. Posting here before going to QTH
classified .
On desk controller
4 Antenna preamps
Phase combiner
Long / Short
Grant, and others.
It is sort of possible to filter high impedance type RX 4-squares. The
source impedance of a 2 foot long 1 inch dia. tubing vertical is a few ohms
resistance depending on the ground situation and approximately a 60 picofarad
series capacitance. For the Hi-Z systems the
Selling my Hi- Z Receive 4 sq , removed from service this past spring .
Replaced with 8 circle array. Posting here before going to QTH classified .
On desk controller
4 Antenna preamps
Phase combiner
Long / Short delay lines
4 phasing line to each vertical
This RX antenna worked fine for me on
The Achilles heal of active whip receive antennas is the
inability to do filtering ahead of the amplifier.
I have spent many hours
brainstorming this problem, and have yet to devise a
solution. Especially one with 40 dB rejection.
I am thinking that if there was any way to
do this, DXE would be
I was asked by a DXpedition leader if it was practical to bandpass
filter the input (antenna side) of the DX Engineering 4 sq's they plan
to use (I have one). Given the few acres of the island and 5 feet ASL
there isn't space to get adequate antenna separation and of course both
transmit
