On 7 Jan 2007 08:15:32 -0800, "Telstar Electronics"
wrote in
.com:

Frank Gilliland wrote:
Brian's amp should be pushing 18dB. If it isn't then he screwed up the
matching of the transistor input and output impedances. That's one
reason why I want to see his schematic.

Frank, wrong as usual. Here is an excerpt from
http://rfdesign.com/microwave_millim...fiers_improve/

"Consequently, the gain of a push-pull amplifier is the same as that of
an individual amplifier,


In the document this refers to amplitude gain, not power gain. That's
why the rest of the sentence says:


where the output power is twice that of an
individual amplifier.


You must have missed that part, huh?


Thus, push-pull amplifiers are frequently used
for combining power of individual amplifiers.


Works for me.


However, there is more to
these amplifiers than combining power. This topology of amplifiers
helps cancel even harmonics and intermodulations and improves the
even-order intermodulation product."


Good citation, Brian. Too bad you can't understand what it means.


Oh, let me guess... the man who wrote this article (director of
engineering at Mini-Circuits) doesn't know what he's talking about
either... LOL

Frank... you just keep getting better & better.


LOL!!! Where's that schematic, Brain?

Frank Gilliland wrote:
In the document this refers to amplitude gain, not power gain. That's
why the rest of the sentence says:


where the output power is twice that of an
individual amplifier.


You must have missed that part, huh?


Thus, push-pull amplifiers are frequently used
for combining power of individual amplifiers.


Works for me.


However, there is more to
these amplifiers than combining power. This topology of amplifiers
helps cancel even harmonics and intermodulations and improves the
even-order intermodulation product."


Good citation, Brian. Too bad you can't understand what it means.

Nice try Frank...

www.telstar-electronics.com

On 7 Jan 2007 09:10:20 -0800, "Telstar Electronics"
wrote in
. com:

Frank Gilliland wrote:
In the document this refers to amplitude gain, not power gain. That's
why the rest of the sentence says:


where the output power is twice that of an
individual amplifier.


You must have missed that part, huh?


Thus, push-pull amplifiers are frequently used
for combining power of individual amplifiers.


Works for me.


However, there is more to
these amplifiers than combining power. This topology of amplifiers
helps cancel even harmonics and intermodulations and improves the
even-order intermodulation product."


Good citation, Brian. Too bad you can't understand what it means.

Nice try Frank...


Do you actually need me to draw you a picture?

Frank Dullard wrote:
Do you actually need me to draw you a picture?

Please do Mr. Dullard... I hope your drawing skills are better than
your electronic skills.

www.telstar-electronics.com

Frank Gilliland wrote:
Good citation, Brian. Too bad you can't understand what it means.

"Consequently, the gain of a push-pull amplifier is the same as that of

an individual amplifier, where the output power is twice that of an
individual amplifier. Thus, push-pull amplifiers are frequently used
for combining power of individual amplifiers. However, there is more to

these amplifiers than combining power. This topology of amplifiers
helps cancel even harmonics and intermodulations and improves the
even-order intermodulation product."


Frank, not sure which part of this paragraph (taken from RF design
site) you don't understand. It says that the gain of a push-pull amp is
the same as for a single device. Read it a few times Frank... maybe
it'll sink in... LOL

www.telstar-electronics.com