SSB ops clear down to 7000 kHz on 40m, Grrrr
Nigel Holmes
Holmes.Nigel at ABC.NET.AU
Sun Jan 22 22:46:54 EST 2006
marine practise when ops used ssb in telegraphy channels was to sit 100-200 Hz below lower edge of telephony signal and why wouldn't you? - with a nominal 250-3000 Hz telephony signal you've got 500+ Hz between any sidebands to place a cw transmission.
the same deal went for fsk where again a cw conversation could nestle between the mark & space
without any fuss.
at VIM the station's tunable receivers were R&S EK890 and a Kenwood R-5000
Nigel
-----Original Message-----
From: Boat Anchor Owners and Collectors List
[mailto:BOATANCHORS at LISTSERV.TEMPE.GOV]On Behalf Of Glen Zook
Sent: Saturday, 21 January 2006 3:20 AM
To: BOATANCHORS at LISTSERV.TEMPE.GOV
Subject: Re: [BOATANCHORS-TEMPE] SSB ops clear down to 7000 kHz on 40m,
Grrrr
Come on over to my house and I'll turn on my Collins
75S-3A with the 200 Hz filter that came in it from the
factory. We will then see about copying a CW signal
through an SSB signal.
You cannot do this with the wider SSB filters that
most equipment use for CW receiving. But, with a
good, narrow, filter you can most certainly copy a CW
signal through an SSB signal.
Been doing it for decades.
Also, those people with a good cebreal filter can also
copy CW through SSB.
Glen, K9STH
--- "Mike D." <hrg at CIFNET.COM> wrote:
Actually, I have never had a problem with copying CW
through an SSB station. In fact, if you use a good CW
filter you probably won't even know that the SSB
station is operating.
It is my opinion this comment is completely false.
Glen, K9STH
Web sites
http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco
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