[Milsurplus] Just had to comment - chirp

[mstangelo at comcast.net]

How does one eliminate chirp in a master oscillator power amplifier, MOPA design? Lightly couple the crystal to the tube, regulate the voltage, or design a separate oscillator?

Thinking back I had issues with the Ameco AC-1 which was my first transmitter with a MOPA design.

Besides the Ameco or CONAR transmitter does anyone recall another MOPA transmitter used by Hams?

Mike N2MS

> On 08/19/2024 7:13 PM EDT Ken Gordon <kgordon2006 at frontier.com> wrote:
> 
>  
> Well, IMHO it depends very much on the AMOUNT of chirp. Sure, al little is fine, but a yoop 
> can make it hard to copy at speeds greater than 20 WPM.
> 
> Personally, I will make great efforts to remove as much chirp as possible...and I want NO 
> clicks.
> 
> Minimizing chirp isn't really all that difficult for most rigs....even for the Conar.
> 
> Ken W7EKB
> 
> 
> On 19 Aug 2024 at 21:21, sbjohnston--- via Milsurplus wrote:
> 
> > 
> > Clicks can take up a lot of bandwidth so it is understandable that
> > they would be of concern.  Same with hum on the carrier.  But chirp
> > or yoop takes up only a little extra bandwidth and I've never felt it
> > was too a big deal for routine contacts.  Actually helps discern one
> > signal from another and gives character, right?  
> > 
> > I'd love to have a time machine to go back and hear how the bands
> > sounded in the decades before I was a ham.  I bet they were more
> > interesting than today. 
> > 
> > The only Official Observer card I ever received was for operating "out
> > of band".  I was on 40m CW with my crystal controlled HW-16 and he
> > was hearing me 455 or 910 kHz away from my actual frequency (I don't
> > recall which).   
> > 
> > Even as a Novice I remember thinking that this seemed more likely a
> > receiver problem on his end than a transmitter issue at my station. 
> > I was in QSO with another station at the time the OO report mentioned,
> > so clearly at least some of my energy was inside the band.
> > 
> > I set up my station to match my logged conditions of that date and
> > time and listened with my Knight R-100 shortwave receiver (my only
> > other piece of gear in those early days) for a spurious out of band
> > signal - nothing heard.  It is not impossible that I had a spurious
> > emission that he heard, but it would be a remarkable coincidence that
> > it was 455 or 910 kHz from the main signal.
> > 
> > If he was having a receiver problem, I bet he wrote a lot of cards
> > that day for all those stations he was hearing out of the band.
> > 
> > 
> > Steve WD8DAS  
> >