I've been using a TT-715 and Heil HC-4 to drive my OMNI-VII to 100 W PEP to
break a few pileups. The OMNI-VII is set for TX BW = 2500, TX Roll Off =
300 Hz, TX EQ = 0 dB, Speech Proc = 50%. The 715 is set up initially to its
manual suggested values. Using a FLEX-1500 as a panadapter (station monitor)
and its audio output via Virtual Audio Cable (VAC) to Audacity (Free Audio
Editor and Recorder), I record my transmissions both in audio and screen
shots of the FLEX-1500 panadapter view of the signal to get a optimum
setting / configuration.
By listening to the recorded audio from Audacity, I hear the over the air
audio, not the microphone monitor mixed with the sound of my own voice and
head resonance in my ears. In addition Audacity has a number of tools which
can be used to analyze each recording of speech processing for best
intelligibility. What I wind up with is a narrow bandwidth transmitted
signal with higher average power. It lacks low frequency elements, but the
HC-4, TT-715, and OMNI-VII are pretty much competitive to un-processed
signals into smaller (600 W) amps. I'm not trying to have great rag chew
audio but rather a transmitted audio to make a QSO in weak signal to large
noise conditions. If I want good audio, I turn the processor off.
While I have a Titan-425, I prefer to chase SSB DX and contest with the
OMNI-VII barefoot at 100W and the TT-715 on.
73 ES DX,
Gary -- AB9M
-----Original Message-----
From: John Rippey
Sent: Thursday, June 13, 2013 5:51 PM
To: tentec@contesting.com
Subject: [TenTec] RF Speech Processor
There is a series of ongoing exchanges on the Yahoo Group for the new
Kenwood TS=990S in which some people say they're finding the average PEP is
not as good as it should be, with or without the speech processor. Rob
Sherwood has opined that this is typical in his experience with DSP rigs,
and says as an aside that he has not found external units that plug into
the mic jack of any value, and that he didn't care for Orion's internal
speech processing among others.
(There is an interesting YouTube video by NA1A, an ESSB guru, in which he
easily breaks into various DX pileups. On the video, "Duke," who is located
in Irvine, CA, claims his success in breaking pileups is due to his
Optibeam antenna. I'm more inclined to think he has squeezed the maximum
speech power out of his audio processing setup which is, needless to say,
very sophisticated.)
In any event, I'm wondering if anyone's had experience using the Ten-Tec
Model 751 in breaking pileups or whatever? Maybe someone's used a scope and
a good watt meter?
John, W3ULS
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