MU 4CX250B <mailto:4cx250b@miamioh.edu>
Tuesday, November 07, 2017 2:35 PM
I’d hazard a guess that most of the SSB splatter one hears comes from
flat-topping (over-driving or under-loading) a linear amplifier. Someone
should market a modern, improved version of the old Heathkit monitor
scope!
I’m not sure it’s worth worrying about the relative IMD performance of
different transmitting tubes.
73,
Jim w8zr
Sent from my iPhone
On Nov 7, 2017, at 1:16 PM, Larry via Amps <amps@contesting.com> wrote:
jim,
i just finished the CQ WW SSB and except for a very few stations the
quality of signals was good. i am using an Icom IC-7800.
i believe that if each of us take the time to contact the offending
station
and explain, in a polite manner that they were "spattering". try to help
them correct the problem. the bands would clean up rapidly. every time
that
i do it the problem is solved and the offending station is grateful.
no one
wants to be rude to others. it's a friendly hobby after all.
complaining does no good.
73,
larry
n7dd
-----Original Message-----
From: Jim Brown <jim@audiosystemsgroup.com>
To: amps <amps@contesting.com>
Sent: Tue, Nov 7, 2017 7:30 pm
Subject: Re: [Amps] Alpha 87 (not 87A)
On 11/7/2017 10:03 AM, Steve Wright wrote:> It's an even more serious
mistake to overtly self-police when there > are no issues to fix.I don't
understand what you mean by "self-police."> FURNISH THE COMPLAINT.Every
time I tune my RX to the SSB part of any active band, I hear splatter
where
the suppressed sideband should be, and beyond the cutoff of the TX
sideband
filter on the active sideband. And I see the distortion on a good spectrum
display that I'm certain is not being generated in the receiver. It is all
too common for a SSB station to be occupying 10 kHz of a band (and I'm not
talking about stations TRYING to transmit "hi-fi.)" And I typically
observe
this on many signals, not just a few. It is not unusual for this splatter
to be as strong as only 10-15 dB below the intentional signal. Casual
ragchewers seem to be the worst offenders, although some contesting lids
are in that club.Why does this matter? Because many of us want to work the
weaker stations on either sid
e of that splattering rig. And because FCC Rules require that our
transmitted signal observe the minimum bandwidth required for the means of
transmission. And because using more than that bandwidth is selfish is
piggish. It's the equivalent of those obnoxious teenage (and older)
drivers
with super loud audio systems driving down the road with their windows
open, cranked up so loud that you feel the vibration of the bass.In
school,
in WV, I learned that with rights come responsibilities. Our licenses
allow
us to run high power to big antennas, but they also require that our
signals be clean.73, Jim
K9YC_______________________________________________Amps mailing
listAmps@contesting.comhttp://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps