[Milsurplus] Chirp and yoop on film

Thu Sep 5 19:32:43 EDT 2024

In this film you can see and hear a one-tube Novice transmitter cranking along, as monitored on an S-40 receiver... 

https://www.youtube.com/watch?v=DLjrr8Mgu5A&t=694s

The crystal might be getting some warmth- don't hold that key down very long!

This movie is a time-machine into ham radio of 50-60 years ago.  Toward the end of the YouTube video there are even some recordings of how the AM phone bands sounded even earlier.

Steve WD8DAS   

sbjohnston at aol.com   
http://www.wd8das.net/   
http://af4k-crystals.com/   
--------------------------------------------------------------------   
Radio is your best entertainment value.   
--------------------------------------------------------------------   

Mein Ohr ganz nah am Weltempfänger...

On Monday, August 19, 2024 at 03:03:30 PM HST, <milsurplus-request at mailman.qth.net> wrote: 

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Today's Topics:

  1. Re: Just had to comment - chirp (mstangelo at comcast.net)
  2. Re: Just had to comment - chirp (Hubert Miller)
  3. Re: Just had to comment - chirp (B. Smith)

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Message: 1
Date: Mon, 19 Aug 2024 20:12:20 -0400 (EDT)
From: mstangelo at comcast.net
To: "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Just had to comment - chirp
Message-ID: <102131627.719142.1724112740616 at connect.xfinity.com>
Content-Type: text/plain; charset=UTF-8

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??
> >

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Message: 2
Date: Tue, 20 Aug 2024 00:59:54 +0000
From: Hubert Miller <Kargo_cult at msn.com>
To: "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Just had to comment - chirp
Message-ID:
    <SN1PR20MB20296AA6A57C972CCE2F88B2E48D2 at SN1PR20MB2029.namprd20.prod.outlook.com>

Content-Type: text/plain; charset="us-ascii"

Philmore had a one tube Novice type transmitter, but not many sold, quite rare. 
I have the 'Novice pair' from the 1950s 'How To Become a Radio Amateur' booklet, but actually using it is a ways off.
-Hue Miller 

------------------------------

Message: 3
Date: Mon, 19 Aug 2024 21:02:29 -0400
From: "B. Smith" <smithab11 at comcast.net>
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Just had to comment - chirp
Message-ID: <a8d13031-ccbe-463b-b20a-e94c46586927 at comcast.net>
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