Re: SCR app notes and file size

["1sclunn" <1sclunn@msn.com>]

were is Jon sheer 's controller web site????
----- Original Message -----
From: <RodHower@aol.com>
To: <ev@listproc.sjsu.edu>
Sent: Sunday, March 24, 2002 7:18 AM
Subject: SCR app notes and file size


> This is somewhat on topic and off topic.
>
> Lee Hart was kind enough to send application notes on analog AC controls
> and an SCR control for brush DC motors.
> Lee even built a control based on this app note.
> The SCR app note is particularly good with information that is helpful for
> new designs utilizing MOSFET's and IGBT's.
> As Lee stated "An important reason to study old designs is that they
> illuminate our way
> for the future. For instance, the highest-tech SCR controllers used
> resonant switching to maximize efficiency and life. With MOSFETs and
> IGBTs, our designs look like the early SCR controllers without resonant
> switching. But designers are just beginning to recognize that resonant
> switching maximizes efficiency and life for MOSFETs and IGBTs, too."
>
> I converted this app note to PDF format and sent it to Jon Sheer to post
> on his controller web site.
>
> I tried to make the file as small as possible without sacrificing
> readability.
> Unfortunately it is still 1.3Mb (the document is 19 pages total).
>
> This is still a big document, although very worthy of downloading.
>
> My question to the list is, how can I make this document smaller?
> It requires scanning 15 pages of 8.5 by 11" pages.
> If you have a detailed method, please email suggestions to me off list.
>
> Thanks,
> Rod
>
>