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

[Rob Atkinson]

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