[TenTec] Yaesu FT-1000D RF Compressor versus Ten-Tec 715 RF Clipper... not the same

[Walter Hopper]

Good to hear from you Rob...  I miss seeing your mother.  Hope she is doing
well.
Do you remember Emily Walker?  She was in that Novice class that I taught
years ago.  She is in charge of the "gifted students" of DeSoto County now.
Her father, Joel Walker, was a good ham friend of mine... and he recently
passed.  I have kept up with you and Barney Cagle.... and sure glad that
both of you are doing exceedingly well.  I congratulate you guys.

Walt

On Sat, May 30, 2009 at 11:15 AM, Rob Atkinson <ranchorobbo at gmail.com>wrote:

> Hi Walt, it's good to hear from you!  I hope everything gg okay in
> Hernando.
>
> Jerry, I disagree with you but having said my piece I'll leave it at
> that.  I would like to see this study from Ten Tec that you mention as
> I think I would find it interesting reading.
>
> My main purpose now is to extend an apology to Rich N7TR as it was not
> my intent to cast him in a poor light and I regret and am sorry for my
> earlier comments so far as they seemed to use him as a punching bag.
> Please forgive me.
>
>
> 73,
>
> Rob / K5UJ
>
>
> 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
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