>The FT-102 was reviewed in QST - October of 1983. John has a pretty good
>memory. 3rd and 5th order imd was down 40 db.
>
3rd down 40db plus 5th down 40db does not equal 40db total IMD, which
would still be over the 40db limit..
>A real sleeper with regard to distortion in rigs with 12 volt finals is the
>Heath SB-104. Almost all rigs with 12 volt finals have to stretch to get
>-30 db for 3rd order distortion. The SB-104 (and A model) used a combiner
>and combine two push-pull amplifiers using 60 watt transistors to get 100
>watts total output. I recall the 3rd order distortion was -38 db.
>
Clever. Another solution is switch the 12VDC at c. 100kHz, and use a FWD
to produce 24VDC. [Trio-Kenwood TS-700]
cheers, Colin
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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