I received a number of replies to my question about RDF. Many thanks to
all. The consensus was that 2 dB difference is the magic number. Thanks
again for your interest, and I look forward to seeing all of you on
Topband.
73,
Mike, W5UC
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Topband Reflector Archives -
Recently, I have been intrigued by the antenna parameter RDF. Please,
can someone tell me, by how much can RDF change(dB) before the
difference in performance of the antenna will be noticeable to the user?
Thanks 73,
Mike, W5UC
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Topband Reflector Archives -
On 9/12/2013 11:48 PM, Jim Brown wrote:
On 9/12/2013 4:06 PM, Herb Schoenbohm wrote:
the nation's station which was WLW for sure
Another interesting point -- WLW was a 50kW clear channel station, and
one of a handful that had their frequency to themselves at night for
all of North America,
Greetings fellow Topbanders:
Please, an antenna question. For the last several years I have use a
Inverted L on 160. Rscently I became able to run more power (from 450
watts up to 1 KW output. At that point it appeared that I had developed
an arc somewhere in my antenna system, so I
On 8/25/2013 6:29 PM, Charlie Cunningham wrote:
Gee, that's really interesting, Andy! I also built a much simpler
oscilloscope when I was a teenager and new ham! Yours was a really elaborate
and impressive 'scope project! Congrats!
Glad to hear from someone who has experience with the KAZ and
Two weeks ago today I shipped my FT-1000MP off to Byron, WA4GEG for
service tune -up. The rig was back here on this past Tuesday, a total
of 13 days including the weekend. It came home in great shape, working
like a champ, and with all issues addressed. There was no effort to fix
things
The CQ 160 contest was a large disappointment this year here in EM21.
At least at this location, Europe was weak or not heard. Please, I would
like to know what others were hearing. I saw few, if any EU postings on
VE7CC from others in this area.
At least I am enjoying the winter. It was a
I received several great responses to my query about Filament chokes.
All were very helpful, and provided information that will allow me to go
forward with this project. Many thanks to all
73,
Mike, W5UC
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Topband Reflector
Hello Fellow Topbanders:
I have just started the process of converting a MLA-2500 amplifier from
it's original 8875 tubes to Gi-7b tubes. Current;y I can run only abut
400 watts on Topband, (not from the MLA=2500, I have no tubes for it)
The conversion requires a RF Choke in the filament
On 12/11/2012 1:36 PM, Jeff Blaine wrote:
I am considering installing one of these hi-z or DXE buffered-type receiving
4-square arrays for 160/80. The best place on the property is on the north
west corner - in a location about 400’ from the transmit vertical. It’s got a
clear shot NE to EU
On 12/9/2012 6:14 AM, Arthur Delibert wrote:
Interesting to see this report. A few years ago, OH2BO wrote on this
reflector that for DX signals traveling through the polar regions, he watches
the solar wind, and expects very good conditions when the solar wind speed is
below 300 km/sec and
On 12/8/2012 4:08 PM, Guy Olinger K2AV wrote:
Alas, will I never see the likes of 1957-58 ever again for working EU on 6M
using an end-fed window screen for an antenna? On the other hand, now
that I have a couple really good trees to support 160m TX antenna, maybe I
don't care. So
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