ping professor

[DrDeath]

I'm not out to flame you, but I just took a look at your website. You claim
your amp with 2 2SC2879s will put out 387 watts PEP. Yet Toshiba's data
sheet states that this transistor is only rated at 100 watts PEP each. Even
Texas Star, who over rates their amps is only claiming 350 watts for a
comparable device which has more features and is $90.00 less. Not to
mention, yours looks like it was made in your garage. Your web site even has
conflicting data. You claim 60% efficiency in your specs, yet your RF amp
basics link states class AB to be 45%efficient.

[Professor]

All good questions...
The Toshiba datasheet "characterizes" that device at 100W PEP. That's a
conservative level, and it doesn't mean the output is limited to that
figure. My ratings are given at the 1dB compression point. That point
is kind of a standard in RF amplifier circles as a point where
lineararity degrades to an unacceptable level. The link states that the
"approximate efficiency" of an AB biasing scheme amplifier is 45%. That
number certainly has some latitude based on the level of bias and is
highly dependent on the quality of impedance matching. The 45% is based
on typical products available to you out there. As for Texas Star...
they have a pretty good product in the amp arena. Since they mass
produce, they can certainly offer their product at a lower price.
However, the quality of their components and overall workmanship is
often not optimum. The SkyWave design has some features that others
don't offer. These may not be obvious but for those operators who are
concerned about low harmonic content and high reliability... these
features sure help. Agreed, the SkyWave is not for everyone... and
hasn't been designed as such. I'm glad to see that you have taken
interest in this topic. Hope that helps.

Professor
www.telstar-electronics.com

[DrDeath]

"Professor" > wrote in message
oups.com...
> All good questions...
> The Toshiba datasheet "characterizes" that device at 100W PEP. That's a
> conservative level, and it doesn't mean the output is limited to that
> figure. My ratings are given at the 1dB compression point. That point
> is kind of a standard in RF amplifier circles as a point where
> lineararity degrades to an unacceptable level. The link states that the
> "approximate efficiency" of an AB biasing scheme amplifier is 45%. That
> number certainly has some latitude based on the level of bias and is
> highly dependent on the quality of impedance matching. The 45% is based
> on typical products available to you out there. As for Texas Star...
> they have a pretty good product in the amp arena. Since they mass
> produce, they can certainly offer their product at a lower price.
> However, the quality of their components and overall workmanship is
> often not optimum. The SkyWave design has some features that others
> don't offer. These may not be obvious but for those operators who are
> concerned about low harmonic content and high reliability... these
> features sure help. Agreed, the SkyWave is not for everyone... and
> hasn't been designed as such. I'm glad to see that you have taken
> interest in this topic. Hope that helps.
>
> Professor
> www.telstar-electronics.com
>
It certainly helps. I disagree with Texas Star having a good product. I have
owned several of them over the years and I am not impressed. I ordered a
667V and there were parts not even soldered to the board.

[Professor]

LOL... like I said... texas Star and others have their quality issues.
I noticed that you commented that my amps looked like they were built
in a garage. Well... you're close... the basement... LOL
Hey, before you knock the looks of my amps... take a look at some of
the others out there... inside and out. I consider most of these amps
nothing more than prototypes. You be the judge.
http://www.amateurlinearamplifiers.com/cgi-bin/cart.cgi?words=Insides%20of%20Amplifiers&user=060107113839&action=search

Professor
www.telstar-electronics.com

[I AmnotGeorgeBush]

From: (Professor)
LOL... like I said... texas Star and others have their quality issues. I
noticed that you commented that my amps looked like they were built in a
garage. Well... you're close... the basement... LOL Hey, before you
knock the looks of my amps... take a look at some of the others out
there... inside and out. I consider most of these amps nothing more than
prototypes. You be the judge.
http://www.amateurlinearamplifiers.com/cgi-bin/cart.cgi?words=Insides%20of%20Amplifiers&user=060107113839&action=search
Professor
www.telstar-electronics.com
_
I like the Canadian connection! A most excellent business strategy.

[fcc@data.orgyour name]

http://www.amateurlinearamplifiers.com/cgi-bin/cart.cgi?words=Insides%20of%20Amplifiers&user=060107
113839&action=search

That looks like a porno book for amp junkies to mastrurbate to......

[DrDeath]

> wrote in message ...
> http://www.amateurlinearamplifiers.com/cgi-bin/cart.cgi?words=Insides%20of%20Amplifiers&user=060107
> 113839&action=search
>
> That looks like a porno book for amp junkies to mastrurbate to......
>
>
Get back in line for your government cheese dogie.