I prefer target practice,it prolongs the fun for a few more minutes. Their receivers for 220 arent much better,the TCXO model makes a great microphone but a lousy receiver...
Chuck Kelsey wrote: >A sledgehammer will correct it as well ;-) And the advantage is that you'll >never have to worry about tuning later on. > >Chuck >WB2EDV > > > >----- Original Message ----- >From: "Eric Lemmon" <[EMAIL PROTECTED]> >To: <[email protected]> >Sent: Monday, May 23, 2005 9:30 PM >Subject: Re: [Repeater-Builder] Transmit Noise > > > > >>>Don, >>> >>> >>You have it right; the correct term is "microphonics." The IEEE Standard >>Dictionary of Electrical and Electronics >>Terms defines microphonics as "The noise caused by mechanical shock or >>vibration of elements in a system." >> >>Tube-type amplifiers are extremely prone to microphonics, since they have >>grids and plates that can be vibrated >>easily. Solid-state devices are much less prone. >> >>IMHO, the most frequent culprit of microphonics in recent radio equipment >>is the thin aluminum shield can over a >>frequency-determining coil/capacitor combination. Vibration at an audio >>rate- such as a human voice- may vibrate the >>thin shield enough to affect the capacitance to ground of the enclosed >>tuned circuit and lead to modulation of the RF >>within. Total encapsulation with wax or epoxy usually corrects this >>effect, but it makes it difficult to tune the >>circuit later. >> >>73, Eric Lemmon WB6FLY >> >> >> >>> >>> > > > > > > > > > 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/
