David wrote:
Andy,

Thanks. I am using single-ended output from the SA602 as well as for the
SA605 input. I decouple the unused output/input with 100n Cap in each
case.

How do you know the match is working correctly ? My concern is that when
I build the circuit and sweep it with a sig gen and tune it for peak,
how do I know the match to is correct in the first place.

Regards

David





For RF matching and filter responses, I like to use RFSIMM99 which is an
impedance analysis program using Sparameters.

The Sparameters are generally for active devices, but it also does a nice
job with resistors, inductors, and capacitors. One trick it has is a
tolerance analysis routine using monte carlo to choose randomg component
tolerances. Very useful when testing to see if a particular circuit is
likely to be tempermental, or if it will tolerate component variation.....

Just do a websearch for RFSIMM99 and you will find the program, it is
freeware.



Jim Pennell
N6BIU



--

21:45 Pacific Time Zone
Jun 6 2006

International Time
04:45 UTC
07.06.2006

Jim,

I have RFsim99.

Do you have an example model for the filter ?

thanks

David

Jim wrote:
David wrote:
Andy,

Thanks. I am using single-ended output from the SA602 as well as for the
SA605 input. I decouple the unused output/input with 100n Cap in each
case.

How do you know the match is working correctly ? My concern is that when
I build the circuit and sweep it with a sig gen and tune it for peak,
how do I know the match to is correct in the first place.

Regards

David





For RF matching and filter responses, I like to use RFSIMM99 which is an
impedance analysis program using Sparameters.

The Sparameters are generally for active devices, but it also does a nice
job with resistors, inductors, and capacitors. One trick it has is a
tolerance analysis routine using monte carlo to choose randomg component
tolerances. Very useful when testing to see if a particular circuit is
likely to be tempermental, or if it will tolerate component variation.....

Just do a websearch for RFSIMM99 and you will find the program, it is
freeware.



Jim Pennell
N6BIU

Andy,

What did you use to measure the voltage on the top of the tank ? I have
a 300MHz scope but the probe still seems to load down the circuit being
measured.

Thanks

Regards

David

Andy wrote:
Andy write:

I found an App note on the web that will
show you how to use it.


http://www.ece.utah.edu/~cfurse/micr...E/L15/L15.html

You can probly find more by doing a google search on :

" Rp Impedance Matching "