516 watts PEP, huh? You are ignorant.

http://www.telstar-electronics.com/SkyWave%202879AB.pdf

On Fri, 29 Sep 2006 02:03:34 GMT, "U-Know-Who"
wrote in :


516 watts PEP, huh? You are ignorant.

http://www.telstar-electronics.com/SkyWave%202879AB.pdf



Yeah, it's a great piece of science fiction.....

You -can- run the transistors that hard..... they will splatter all
the way up into the UHF band for about 10 seconds then burn up. The
transistors are designed for 100 watts PEP each but the IMD product
jumps dramatically above 60 watts PEP. Then there's his claim of 55%
efficiency from a Class AB amp..... and built with transistors that
are only rated for 35% efficiency. Hey, if you believe that, I have
some really nice farmland for sale just off the coast of Montana!

My favorite part is his "compression region" scam. Audio compression
can be a good thing in radio communications, but he's using the term
as a euphamism for non-linear amplification of the -radio- signal. Not
only that, he arbitrarily designates a "1% compression point" as some
sort of threshold beyond which harmonics -might- cause a problem. Let
there be no confusion he Harmonics -will- be a problem beyond this
point, especially if you run AM because you will need to reduce your
carrier (dead-key) to less than one fourth of this threshold. So don't
expect to run more than 30-50 watts AM from this amp or you will have
a lot of ****ed-off neighbors.

But I'll give him credit where credit is due: If you want an amp that
-LOOKS- like it was professionally made then his is the one to buy.
Just don't use it and compare the performance with the spec sheet or
you'll be sorely disappointed (if not furious!).

U-Know-Who wrote:
516 watts PEP, huh? You are ignorant.

http://www.telstar-electronics.com/SkyWave%202879AB.pdf

Actually it will do that... and more, if you will accept compression
distortion. I suggest you great electronics wizards go to
http://www.rf-amplifiers.com/index.php?topic=peak_power and read the
defibition of PEP. Or maybe you think the people at EMPower don't know
what they're talking about either... LOL

www.telstar-electronics.com

Frank Gilliland wrote:
My favorite part is his "compression region" scam. Audio compression
can be a good thing in radio communications, but he's using the term
as a euphamism for non-linear amplification of the -radio- signal.

Frank, you're showing your ignorance once again. If you knew
anything... you would know that all RF amplifiers are power rated to a
1dB compression point. That is the point where linearity starts to
deteriorate. I suggest you look here...
http://www.rf-amplifiers.com/index.php?topic=rf_power
Now don't you feel stupid?... you should... LOL


www.telstar-electronics.com

On 29 Sep 2006 05:53:39 -0700, "Telstar Electronics"
wrote in
. com:

Frank Gilliland wrote:
My favorite part is his "compression region" scam. Audio compression
can be a good thing in radio communications, but he's using the term
as a euphamism for non-linear amplification of the -radio- signal.

Frank, you're showing your ignorance once again. If you knew
anything... you would know that all RF amplifiers are power rated to a
1dB compression point. That is the point where linearity starts to
deteriorate. I suggest you look here...
http://www.rf-amplifiers.com/index.php?topic=rf_power
Now don't you feel stupid?... you should... LOL


Where's any 2SC2879 data sheet that specifies its "1% compression
point"?

On 29 Sep 2006 05:40:05 -0700, "Telstar Electronics"
wrote in
om:

U-Know-Who wrote:
516 watts PEP, huh? You are ignorant.

http://www.telstar-electronics.com/SkyWave%202879AB.pdf

Actually it will do that... and more, if you will accept compression
distortion. I suggest you great electronics wizards go to
http://www.rf-amplifiers.com/index.php?topic=peak_power and read the
defibition of PEP. Or maybe you think the people at EMPower don't know
what they're talking about either... LOL


Yep, their 'defibition' is right on the money. Now I suggest -you- do
a little math with power dissipation and efficiency ratings. BTW, how
did you get your distortion figures?

Frank Gilliland wrote:
Yep, their 'definition' is right on the money.

Want to refute my 516W PEP figure any more?... LOL

www.telstar-electronics.com

Frank Gilliland wrote:
BTW, how
did you get your distortion figures?

The 1dB compression point was calculated using an HP spectrum analyzer
I have access to at work. It was also used to get the harmonic
readings.

www.telstar-electronics.com

On 29 Sep 2006 06:36:22 -0700, "Telstar Electronics"
wrote in
. com:

Frank Gilliland wrote:
Yep, their 'definition' is right on the money.

Want to refute my 516W PEP figure any more?... LOL


I didn't dispute it in the first place. This has to be about the tenth
time you failed to understand what I wrote. Do you have lysdexia or
some other communication deficit?

Frank Gilliland wrote:
Where's any 2SC2879 data sheet that specifies its "1% compression
point"?

Frank, I'm surprised at you.
It doesn't... that parameter doesn't apply to the transistor itself...
only a final amplifier. After all, how would Toshiba know what
frequency or class of operation were being used? Both of these, as well
as the actual amplifier circuit chosen are critical to where the
compression point will lie.

www.telstar-electronics.com