EMRFD Message Archive 2731
Message Date From Subject 2731 2009-02-22 12:03:20 Wes Hayward New softward for EMRFD readers.
Yesterday I posted some info on the third printing of EMRFD and
described the new software that is to be included with it. That
software is now available to the folks who already have EMRFD. Just
go to my web site (w7zoi.net) where you can download a Zip file that
contains all of the programs, the manual as a PDF, and some sample
data files. The ZIP is a large file.
Enjoy. Let me know when you find the bugs -- I'm sure there will be
some.
73, Wes
w7zoi2732 2009-02-22 12:23:54 Wald, 3Z6AEF Re: New softward for EMRFD readers.
Wald 3z6aef
Wes Hayward napisał:
> Hi all,
>
> Yesterday I posted some info on the third printing of EMRFD and
> described the new software that is to be included with it. That
> software is now available to the folks who already have EMRFD. Just
> go to my web site (w7zoi.net) where you can download a Zip file that
> contains all of the programs, the manual as a PDF, and some sample
> data files. The ZIP is a large file.
>
> Enjoy. Let me know when you find the bugs -- I'm sure there will be
> some.
>
> 73, Wes
> w7zoi
>2733 2009-02-22 14:51:50 bob bailey Re: New softward for EMRFD readers.
I ran into a small problem with the files in the zip package.
reading the pdf manual it states to run the set up file to install the programs, the problem is I cant find the set up file.
where is it ?
bob
WB7DMX
2734 2009-02-22 17:12:17 Wes Hayward Re: New softward for EMRFD readers.
Whoops. That statement in the early part of the new manual is there
to go with the League package. It does not really apply here.
There is no SETUP.exe.
There is nothing to the installation other than to merely copy all
files to a directory. Just set up a suitable folder or directory
such as "My Ladpac" and then copy everything in the ZIP to the folder.
When you then want to run a program, examine the folder with Windows
Explorer and double click on the program you wish to run.
Sorry about the confusion.
73, Wes
w7zoi2735 2009-02-22 22:43:16 Vincenzo Calandra Re: New softward for EMRFD readers.
Hi Wes,
only a great thanks...
> Hi all,[...]
>
> Yesterday I posted some info on the third printing of EMRFD and
> described the new software that is to be included with it. That
> software is now available to the folks who already have EMRFD. Just
73 de IZ5GVP Enzo (vcalandra@libero.it)
[Non-text portions of this message have been removed]2736 2009-02-23 07:14:22 f2dc2003 Re: New softward for EMRFD readers.
73
Roland F2DC
===================================
2746 2009-02-27 04:44:37 Heikki Ahola (OH... Re: New softward for EMRFD readers.
inclusion of the mixed form of the TTC. Referring to the previous
discussions about different forms of bandpass filters and their
design, I wonder if this mixed form has more or less replaced the
series resonance type. This mainly because I am in the process of
designing and building a bunch of bandpass filters for my equipmnent
and still considering diffrent approaches. I find the series resonance
type quite attractive because the coupling between resonators does not
require tiny capacitors, which in the 50 MHz regi2750 2009-02-27 12:47:33 Wes Hayward Re: New software for EMRFD readers.
No, the new mixed form of the TTC does not replace the one with series
resonators. If you are building a circuit where is is especially
difficult to find suitable coupling capacitors, the form with series
resonators is still a good choice. It is also good if you are looking
for a strong low pass character in the stopband. The form with
series resonators has the practical disadvantage that the variable
capacitors are not grounded. This can introduce practical problems
when you build the filter. The new form has the virtue that all
trimmers are grounded.
If very small coupling capacitors are needed, you can always use the
classic gimmick where two wires are twisted together. Merely trim
the length of the resulting cap to obtain the desired filter shape.
In the case of a TTC, make the two coupling capacitors equal in size.
I presented the equations for the series resonator design in a piece