Jordan, Joe answered your question accurately. The benefit of running the oscillator all the time is stability. It won't hurt anything to have the oscillator running all the time as long as the exciter is not keyed (Keyed A+ active)
I often *must* keep the channel element running on my 220 true FM conversions. All the audio stages are DC capacitively coupled with relatively LARGE value capacitors. If I don't keep the osc. running all the time, the frequency "swoops" when the exciter is keyed until all the capacitors charge to their stable resting voltages. Once you unkey the caps discharge again and the whole process repeats the next time the exciter is keyed. Keeping the channel element and first stage running all the time eliminates this problem. The only annoyance is that you can hear the oscillator running when you are within a few hundred yards of the site (It's just amazing how far a little power will go!!!) In *most* situations there is no advantage either way. (running at all times or not) If hearing the oscillator running all the time bugs you, do the keying mod. If not, don't worry about it. Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 ----- Original Message ----- From: "twoway_tech" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, May 29, 2007 5:56 PM Subject: [Repeater-Builder] Re: Micor oscillator mod question > > So,is there any point to leaving the oscillator on all the time? > > jordan > > --- In [email protected], Kevin Custer <[EMAIL PROTECTED]> > wrote: >> >> twoway_tech wrote: >> > I just modified my micor UHF for the exciter to be on all of the time. >> > I am not for sure that I really like this mod. The oscillator signal >> > seems to carry pretty far. Can someone tell me exactly what is gained >> > by wiring the exciter to be on all of the time. Is it just for faster >> > transmit response time? >> > Thanks & I'm sure there will be more questions to come! >> >> Station? We use the (unused) antenna switch logic (on the SCM) to >> control the channel element ground. >> Works great, less filling... >> >> Kevin >> > > > > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.472 / Virus Database: 269.8.3/824 - Release Date: 5/29/2007 > 1:01 PM > >
