[TenTec] RF Speech Processor

[GARY HUBER]

Thanks Dave,

I'm also at 348 for DXCC, needing only VP8-S and FT8W to complete the 
current DXCC list. After 40 years in the hobby and more than twenty in the 
telecommunications industry working with telephones, cellphones, and 
commercial two - way radios, I have some appreciation for transmitting audio 
in the 300 to 3000 Hz range so that it can be decoded easily by the human 
ear at the far end of the circuit.

Having hearing disabilities in both ears has also caused me to do additional 
reading on Fletcher and Munson's research and significant experimenting with 
the Heil HC-4, TT-715, OMNI-VII, FLEX-1500, and Audacity for processed audio 
for DXing.

I've also worked up some good settings for AM using the TT-705 microphone, 
200 HZ low end roll-off and 3400 Hz BW in the OMNI-VII, using Audacity but 
that's a story for another time and was not what the thread originator asked 
about.

73 ES DX,
Gary -- AB9M
-----Original Message----- 
From: dhhdeh at comcast.net
Sent: Friday, June 14, 2013 7:57 AM
To: tentec at contesting.com
Subject: [TenTec] RF Speech Processor



Gary is 100% correct if your objective is to work rare DX in a competitive 
environment. This can be configured as he describes with great success 
towards that end.



Back in the 1970's one of my good friends and DX mentor who was, and is, a 
top DX'er around here (#1DXCC, Worked All Counties X4, Worked All Oblasts, 
high scores in the DX contests etc) ran a TR-7 with no on-board processor 
into two VOMAX RF processors in series (very similar to the TT 234 and 
today's digital 715) into a L4-B and then to a 4 element wide spaced 20m 
monobander at 75 feet. A big gun DX'er he was.



It wasn't pretty sounding but there was no pileup of that era that he could 
not crack with more than three calls. None.
I used to tell him that it sounded like "war" mode but it worked marvels for 
his DXing objective back then.



My experience with the 715 using it with my Omni V.9, Corsair II and now my 
Omni VII is that it gives my signal the presence similar to having a 600 
watt amp in line. And if I really need that contact, I occasionally use it 
in series with the rig's on-board SP with similar results to what Gary 
describes, being careful of how much of each to use. No tower, beam or 
linear  here and with #348 for DXCC..... It works.



73 de N1LQ-Dave
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