What is CCW?
Amateur Radio Coherent CW was invented by Ray Petit, W7GHM. He is also the
inventor of Clover now manufactured by HAL Communications. The first
amateur QSO was by Andy McCaskey, WA7ZVC using a Ten-Tec PM-1. CCW was
promoted by Chas. Woodson (Woody), W6NEY a professor at Stanford
Jerry
The new mode FT8 is not all that new, actually, there are several aspects to
consider, like detect the signal, decode the signal detected, make a
decision to accept the decoded signal. The improvement on signal to noise
ratio concept is very old, just the internet made it possible with
Chuck, I suspect something wasn’t quite right with your setup? At my QTH in W3
I can hear multiple FT8 signals on 1840kc USB (2.4khz bandwidth) from before my
sunset until after sunrise. They are whining/droning carriers for 13 seconds
every 15 seconds. Only for that less than 2 seconds every
Hi,
we use 4ports-RX-splitter
https://www.ebay.com/itm/4-WAY-HF-ANTENNA-SPLITTER-COMBINER-RX-0-1-50-MHz-SO-239-connectors/322564884873?hash=item4b1a5d8989:g:JJ4AAOxyM89Sbujo:rk:1:pf:0
73! de Eugene RA0FF
http://www.qsl.net/ra0ff/
>Вторник, 25 декабря 2018, 8:17 +11:00 от Chuck Dietz :
>
>I
I think I understand much of what you are saying, but I know that I was on 160
meter FT=8 two nights ago with the speaker up fairly loud. I only heard noise.
I set the AGC off and adjusted the RF gain so that it did not overload. Still
no hint of any signals, but I decoded two stations!
Just
Although I have finished my FT8 testing, there is one final thought I
would like to leave with you, and also to correct one statement I made
earlier. Someone thought FT8 measured the noise in the interval when
the FT8 signals were off, and I replied that would result in a real S/N
number.
Corrected the autotransformer turns/tap on the 2-way splitter examples...
http://no3m.net/wp-content/uploads/2018/12/splitters.png
On 12/24/18 1:57 PM, Eric NO3M wrote:
Frank
If you really want a 3-port splitter, see here:
http://no3m.net/wp-content/uploads/2018/12/splitter-3.png
Two more
Frank
If you really want a 3-port splitter, see here:
http://no3m.net/wp-content/uploads/2018/12/splitter-3.png
Two more common alternatives using 2-port splitters:
http://no3m.net/wp-content/uploads/2018/12/splitters.png
73 Eric NO3M
On 12/24/18 8:00 AM, Frank VO1HP wrote:
Does anyone
Hi Frank,
I don't know anything about 3-way splitters, but if I were in your
situation I think I would sacrifice 1 dB and make a 4-way splitter using
3x 2-way splitters. 2-way is much more commonly used and documented, and
quite probably easier to achieve than 3-way. The 4th port is simply
All, As Tree noted I've been able to get into Eastern Central and
Norther Europe this past week. Truly a very rare case from this far
south. The northern guys have an hour more darkness than at my latitude.
The openings have been somewhat spotty. I do not rely on RBN spots.
Most RBN do not
Does anyone have a schematic for a 75ohm three port splitter using #73
binocular cores. I have those on hand. Need to feed beverage to two
TS590SG’s and Skimmer SDR in CQWW160.
73 Frank VO1HP
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Merry Christmas and Happy New Year:
On 160 m. (probably due to the close proximity to my inverted L) my
NCC-1 rx antenna phasing box would snap crackle and pop on transmit,
most likely the result of RF getting into the nine relay coils inside.
If you employ phased rx antennas and a tx antenna,
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