[Amps] Audio BW -- Please just let us operate!!
R.Measures
r at somis.org
Fri Aug 27 10:32:33 EDT 2004
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 at 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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>>>
>>>
>>> STEVEN GRANT W4IIV
>>>
>>> ---------------------------------
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>>
>
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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