Jerry, you are quite right regarding the design. But I do wonder if
everyone knows the difference or if TT is simply selling them as a "better"
processor. If everyone has the right information, most of the time they
will make reasonably good decisions. Had a boss one time that taught me
that anytime you make a mistake, its due to not having all the facts to
consider. The assumption is that with all the facts, reasonable people make
good decisions.
73's
David
Wd9cmd
----- Original Message -----
From: "Jerry Volpe" <kg6tt@arrl.net>
To: <tentec@contesting.com>
Sent: Friday, May 29, 2009 4:31 PM
Subject: [TenTec] Yaesu FT-1000D RF Compressor versus Ten-Tec 715 RF
Clipper... not the same.
> Quote:
>
> "Dear Rick,
>
> With all due respect, I'm interested in finding out why you are using
> the Ten Tec RF processor with a 1000D when the 1000D has one of the
> best RF speech processors ever to be included with a ham rig, built
> right into one of the rig's IFs where an RF processor belongs."
>
>
>
> There is another issue at work here when comparing the Yaesu design to the
> Ten-Tec 717....
>
> A check of the FT-1000D User Manual confirms that Yaesu included an RF
> Speech Compressor circuit... whereas the Ten-Tec Model 715 is an RF
> Clipper.... not a compressor. There are rather significant differences to
> how compressor and clipper circuits work, with clippers being more complex
> in design therefore generally more costly.... which is why most
> transceivers use either audio compression, audio clipping or RF
> compression for speech processing circuits. Then of course all audio
> compressors are not alike.... all RF compressors are not alike, etc.
>
> There have been more than a few studies over the years comparing the
> maximum possible 'clean(ish)' increase in average voice for a RF
> compressor versus a RF clipper circuit. Ten-Tec provides a copy of one of
> those studies with each 715 and I believe it can be downloaded from their
> website as well. I suggest a good place to begin is to allow each person
> to do their own investigation and afterwards make up their own minds as to
> what is right for their needs.
>
> 73,
> Jerry, KG6TT
>
> --
> Ralph Jerald "Jerry" Volpe
> Amateur Radio Operator KG6TT
> ARRL Member & VE
> FISTS 12304
>
> 788 Chestnut Drive
> Fairfield, CA 94533
>
> kg6tt@arrl.net
>
> 510 325-7724
> 707 399-8838 FAX
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
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