Hi Duane, This group is truly amazing, I would like the two pages describing the building of the sweep modulator. I can get the rest later when it is scanned. I understand it makes good reading.
Thanks Ted [EMAIL PROTECTED] ----- Original Message ----- From: "ka8gvh" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, May 02, 2005 6:30 PM Subject: [Repeater-Builder] Re: GE Datafile Bulletin 1000-6 & Appendix A >I found it, buried, deep in my Lynchburg Library. > > Scanning all 54 pages will be a chore. I have the two pages of > appendix A "How to Build a Simple Sweep Modulator" ready to email to > those that want it. > > The first three chapters would be a great addition to the Repeater- > Builders web site. I count about 30 graphics in those 3 chapters and > appendix. OCR the rest. I could make a trip to Kinko's and get copies > made, but would much rather give the book to someone who will post it > for all to use. Suggestions? Volunteers? > > Duane Hall > AB8QU > > ----------------------- > > GE Datafile Bulletin 1000-6 > April 1967 > I-F Alignment of Two-Way Radio FM Receivers > James J. Carrington - Specialist - Service Data > 54 Pages > > Table of contents > > Introduction > Chapter 1 - I-F Filters used in FM Receivers > I-F Transformers > Ceramic Filters > Crystal Filters > Mechanical Filters > Chapter 2 - How to tell when IF alignment is needed. > Reasons why I-F realignment may eventually become necessary. > Symptoms of misalignment > False Indications of Misalignment > Tests to see if realignment is needed > Chapter 3 - Alignment Procedures > General Alignment Information > Peaking Method > Peak and Dip Method > Resistor Loading Method > Sweep Method (Oscilloscope Alignment) > Chapter 4 - Tips for Aligning Particular GE Recievers > Pre-Prog > Prog > Prog Portables > TPL and Business Mate > Pacer > Accent 450 > Message Mate Rxrs > Voice Commander and Voice Director Rxrs > Porta-Mobil and Motorcycle > Mastr Pro and IMTS > Mastr Executive > Appendix A - How to Build a Simple Sweep Modulator > Appendix B - How to Build a Low-Frequency Sawtooth Generator > > Summary - > This bulletin describes the types of I-F filters used in two-way > radio FM receivers and tests which can be used to determine when I-F > alignment is needed. The four methods of alignment commonly used are > discussed and tips for aligning particular GE recievers are > presented. Particular emphasis has been placed on the sweep alignment > method. The appendix provides instructions for building a simple > sweep modulator and a low frequency sawtooth generator. > > > From chapter 3 > "...I-F circuits do not normally require realignment. Realign IF's > only when you are sure it is needed. In other words, Think before you > twiddle!..." > > > > > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
