On Aug 27, 2004, at 7:18 AM, Will Matney wrote:
Dale, and everyone else on the reflector,
I would like to hear a debate about using so called speech processors.
To my understanding, they're just an amp running almost wide open with
clipping. The makers of these amps "claim" that they will not cause
splatter, then every OP I've heard say they do. So which is it, the
pros and cons?
A problem with speech processing is that using one is a tacit admission
that one's equipment is too small. Another problem is the feculent
sound they produce at the Rx end.
Will Matney
The worst spectrum hogs are those that overdrive their amps and AM
with modified speech amps. The splatter is awful.
Dale
On Aug 27, 2004, at 7:36, Steven Grant, W4IIV wrote:
hey Joe
the issue is not the bassiness itself, the issue is that bass uses
up so much power.
i cannot copy a bass boosted signal at S-9
the op has to boost his high end so his "audience" can copy him, so
in this case we have 2 issues: 1) splatter caused by all that bass
2) increased hi frequency components that do make the signal wide
steven W4IIV
Joe Isabella <n3ji@yahoo.com> wrote:
I decided to break this out separately because I've heard this same
story over and over and over
again. Anyone running some extended low-end content is "wide". I
already stated this before, but
"bassiness" does not = wide bandwidth. If any of you don't
understand that the higher frequencies
(in a properly adjusted transmitter) are the only way that a signal
is "wideband", and that highly
compressed, overdriven audio (often heard during contest periods or
DX-peditions) can be twice as
wide a 6k SSB signal, then I suggest you go back and study radio
theory. Don't make comments
without ID'ing, or make gross noises during my QSO -- I may very
well be running 3k audio with
some enhanced low frequency content, not any wider than you. My EQ
settings (which are stored in
memories) and my rig's TX BW setting compliment each other. I don't
try to cram "10lbs. of audio
in a 5lb. radio", as many of you think. What can be accomplished
with a little patience and some
experimentation is truly outstanding audio that's narrower than
"overdriven contest audio", even
if you only run 3kHz. I typically run a little more than that (about
3.2), and I will continue to
do so (try and measure it over the air -- I think you'll find it
difficult). I have spent less on
my audio gear (about $400) than many of you spent on a couple mics.
I can mimic Heil's HC-4,
HC-5, or Goldline with a flick of an EQ setting, and still ends up
sounding much better due to the
external adjustable compression, downward expander, and customized
EQ'ing.
Oh and BTW, I haven't even TOUCHED my rig as far as modifications.
The audio isn't going directly
to a "balanced modulator", it enters the rig and follows the same
path it would if I just plugged
a mic into it (straight into the audio CODEC, via a couple audio
pre-amps). So don't give me that
garbage about "hacked rigs" or "ripped out filters". That's another
myth.
I'm on vacation in the Keys -- just got here today. Sorry to stir
the pot like this, but I just
can't stand to see inaccurate information and obviously emotional
opinions without substantiation
go unanswered. You got spectral plots (from a *REAL* spectrum
analyzer, not these garbage
"bandscopes"), show me -- if not, you're trying to push up a rope.
You won't hear from me for a
few days. Have a great weekend!! Now, where's my beer...
Buenos Nachos!! Joe,
N3JI
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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