james wrote:
Go and do some research. Gain increases as frequency decreases. The
major problem of using this device at 27 MHz is keeping the gain low
enough so that the amp will be stable. Any amp using this part at
27MHz will have to have a lot of feedback to minimize gain.

Yes the gain would be high at 27MHz... however... having too much gain
is never really a big problem... you can always throttle it back. It's
having too little gain that comes to get you... LOL

www.telstar-electronics.com

On 5 Jan 2007 10:16:50 -0800, "Telstar Electronics"
wrote:

+++james wrote:
+++ Go and do some research. Gain increases as frequency decreases. The
+++ major problem of using this device at 27 MHz is keeping the gain low
+++ enough so that the amp will be stable. Any amp using this part at
+++ 27MHz will have to have a lot of feedback to minimize gain.
+++
+++Yes the gain would be high at 27MHz... however... having too much gain
+++is never really a big problem... you can always throttle it back. It's
+++having too little gain that comes to get you... LOL
+++
+++www.telstar-electronics.com
**********

right, keep on thinking man. Get a unity gain with the right feedback
and you have an oscillator.

james

On Sat, 06 Jan 2007 02:31:08 GMT, james wrote
in :

On 5 Jan 2007 10:16:50 -0800, "Telstar Electronics"
wrote:

+++james wrote:
+++ Go and do some research. Gain increases as frequency decreases. The
+++ major problem of using this device at 27 MHz is keeping the gain low
+++ enough so that the amp will be stable. Any amp using this part at
+++ 27MHz will have to have a lot of feedback to minimize gain.
+++
+++Yes the gain would be high at 27MHz... however... having too much gain
+++is never really a big problem... you can always throttle it back. It's
+++having too little gain that comes to get you... LOL
+++
+++www.telstar-electronics.com
**********

right, keep on thinking man. Get a unity gain with the right feedback
and you have an oscillator.


Especially with a high input impedance and large internal capacitance.
Try to run them puppies hard outside the recommended frequency range
and -=POOF=-!!!

Frank Gilliland wrote:
Especially with a high input impedance and large internal capacitance.
Try to run them puppies hard outside the recommended frequency range
and -=POOF=-!!!

Nonsense Frank... I have built amplifiers at 40MHz with these MRF173s
with no problem.
That's like saying since a 2N3055 has an Ft=2.5MHz... that you couldn't
use for an audio amp... or they would blow up... LOL

www.telstar-electronics.com

On 6 Jan 2007 06:23:18 -0800, "Telstar Electronics"
wrote in
. com:

Frank Gilliland wrote:
Especially with a high input impedance and large internal capacitance.
Try to run them puppies hard outside the recommended frequency range
and -=POOF=-!!!

Nonsense Frank... I have built amplifiers at 40MHz with these MRF173s
with no problem.


Uh-huh. That's why you are unloading them at a fraction of the market
price, right?


That's like saying since a 2N3055 has an Ft=2.5MHz... that you couldn't
use for an audio amp... or they would blow up... LOL


Incredible..... how do you manage to stick your foot so deep into your
mouth? The 2N3055 is bipolar, has a relatively low input impedance,
and is -INTENDED- for frequencies from DC through audio and up. Not
only that, your implication is that the transition frequency (Ft) is
the intended operation frequency when in fact it is the point at which
the transistor exhibits unity gain, making it pracitically useless at
that frequency.

So where's that schematic, Brian?

Frank Gilliland wrote:
Incredible..... how do you manage to stick your foot so deep into your
mouth? The 2N3055 is bipolar, has a relatively low input impedance,
and is -INTENDED- for frequencies from DC through audio and up. Not
only that, your implication is that the transition frequency (Ft) is
the intended operation frequency when in fact it is the point at which
the transistor exhibits unity gain, making it pracitically useless at
that frequency.

Frank, don't know any nice way of saying it... you're just plain
stupid.

www.telstar-electronics.com

On 6 Jan 2007 08:49:45 -0800, "Brian 'Hack-and-Quack' Griffey"
wrote in
.com:

Frank Gilliland wrote:
Incredible..... how do you manage to stick your foot so deep into your
mouth? The 2N3055 is bipolar, has a relatively low input impedance,
and is -INTENDED- for frequencies from DC through audio and up. Not
only that, your implication is that the transition frequency (Ft) is
the intended operation frequency when in fact it is the point at which
the transistor exhibits unity gain, making it pracitically useless at
that frequency.

Quack, quack, quack, quack, quack, quack, quack, quack, quack, quack,
quack.


Your feathers are a bit ruffled, Brian.