On 5/26/2023 7:53 PM, Jeff Blaine wrote:
Saw the interview. Fascinating. The guys have done a ton of work and
that approach makes sense for these environmentally hyper-sensitive QTH.
Makes sense for lots of locations. Using batteries to buffer a smaller
gen that can support a power amp but r
Saw the interview. Fascinating. The guys have done a ton of work and
that approach makes sense for these environmentally hyper-sensitive QTH.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 5/25/2023 9:57 PM, j...@kk9a.com wrote:
Tim Duffy's AA7JV R.I.B. interview is on Youtube:
http
Tim Duffy's AA7JV R.I.B. interview is on Youtube:
https://www.youtube.com/watch?v=1XqBhp7M2Uk
John KK9A
N1RR Wrote:
George, Jim,
Where can we find George's work for these items ??
-Charlie N1RR
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
The RIB is an interesting concept.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 5/24/2023 4:05 PM, Jim Brown wrote:
On 5/24/2023 11:10 AM, Charles Morrison wrote:
Where can we find George's work for these items ??
Just looked at his AA7JV qrz page, where there's extensive descript
On 5/24/2023 11:10 AM, Charles Morrison wrote:
Where can we find George's work for these items ??
Just looked at his AA7JV qrz page, where there's extensive description
of their Oceania trip and Radio In A Box, with lots of photos. George's
deep pockets are the result of some important mass-m
On 5/24/2023 11:10 AM, Charles Morrison wrote:
Where can we find George's work for these items ??
I heard him present it at Visalia in 2019; he presented it the next
month at Dayton.
73, Jim K9YC
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
George, Jim,
Where can we find George's work for these items ??
-Charlie N1RR
On Wed, May 24, 2023 at 5:06 AM Jim Brown wrote:
> George's work on this system is first class engineering, and has
> revolutionized TopBand expeditions, allowing simultaneous use of the two
> best small signal modes,
George's work on this system is first class engineering, and has
revolutionized TopBand expeditions, allowing simultaneous use of the two
best small signal modes, CW and FT8, by expeditions transmitting high
power. He developed the system so that the expedition wouldn't miss the
one or two "mag
I have built, for DXpedition use, a very selective RX front-end for 160 m
for simultaneously operating CW and FT8 on shared TX and RX antennas with
800 feet of separation. The LC filter had 8 dB loss at 1825 kHz and it was
about 10 dB down from that at 1840 kHz (-8dB at 1825 and -18dB at 1840).
"Any new ideas on high performance preamps for 160m?? "
The only thing I can suggest is to build the front end of the
preamp as if it were a JW Miller style crystal radio, followed by the
amp itself. Yep, crystal radio. Those sets had a bandwidth of ~10khz.
Super selective and, yes, on 160m the
Hi Folks
I am following the conversation about LOG RX antennas, I understand the pain
from a noise city lot on 160m. it is hard. I am using Waller Flag's
vertical, since 2006, and horizontal since 2010, however vertical noise is
so bad with new solar panels and EV charges , on top of LED lights
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