Usually you get more punch as seen on the wattmeter and the receiver
S-meter with strong lows. Sometimes you get better copy on a weak signal
with a little enhancement of the highs for better articulation. That's
not really highs up at 2 to 3 kHz, probably more mid range 1200 to 1500
Hz. I tend on SSB, HF or VHF and up, to use my DSP audio filter to roll
off about 2100 Hz so any power you put in the audio spectrum above that
is wasted making QRM. That would correspond to receiving with an 1800 Hz
filter with the carrier about 300 Hz from the lower corner which is
typical. On my S-line I'd be receiving with a 2100 Hz filter so anything
above 2400 Hz is wasted. Stock filter in more classic Tentecs is 2.4 KHz
so maybe 2700 to 2800 would be heard.
Close talking most microphones will provide a bass boost.
I've had complaints on 2M FM from those using handhelds with 3/4"
speakers when I've used an EV664 on FM though on a decent speaker it has
to be well supplied with lows. But on the tiny speaker it made for lots
of distortion as the speaker cone ran out of room to move. The 664 does
make wattmeters rise as well as S-meters on SSB from its extended bass
response.
73, Jerry, K0CQ
On 12/6/2010 1:21 PM, CSM(r) Gary Huber wrote:
Recently I experimented with the TX equalization on my OMNI-VII by
attenuating the lows and increasing the highs. What I found was, it didn't
help, at least in contests it didn't, even with the amp on. I get better and
unsolicited reports with the TX equalization set for flat!
73 es DX,
Gary - AB9M
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